WO2020087120A1 - Method and appliance for assisting putting on rehabilitation monitoring sensor post knee surgery - Google Patents

Method and appliance for assisting putting on rehabilitation monitoring sensor post knee surgery Download PDF

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Publication number
WO2020087120A1
WO2020087120A1 PCT/AU2019/051193 AU2019051193W WO2020087120A1 WO 2020087120 A1 WO2020087120 A1 WO 2020087120A1 AU 2019051193 W AU2019051193 W AU 2019051193W WO 2020087120 A1 WO2020087120 A1 WO 2020087120A1
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WO
WIPO (PCT)
Prior art keywords
band
claws
appliance
rod
shoulders
Prior art date
Application number
PCT/AU2019/051193
Other languages
French (fr)
Inventor
Jacek Kowalski
Original Assignee
Australian Unity Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2018904151A external-priority patent/AU2018904151A0/en
Application filed by Australian Unity Limited filed Critical Australian Unity Limited
Publication of WO2020087120A1 publication Critical patent/WO2020087120A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813Specially adapted to be attached to a specific body part
    • A61B5/6828Leg
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1113Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114Tracking parts of the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1121Determining geometric values, e.g. centre of rotation or angular range of movement
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683Means for maintaining contact with the body
    • A61B5/6831Straps, bands or harnesses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/02Jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J1/00Manipulators positioned in space by hand
    • B25J1/04Manipulators positioned in space by hand rigid, e.g. shelf-reachers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J1/00Manipulators positioned in space by hand
    • B25J1/06Manipulators positioned in space by hand of the lazy-tongs type
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2505/00Evaluating, monitoring or diagnosing in the context of a particular type of medical care
    • A61B2505/09Rehabilitation or training
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04Constructional details of apparatus
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0219Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1126Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb using a particular sensing technique

Definitions

  • the present invention is in the area of rehabilitation equipment.
  • magnetometers and accelerometers have seen increasing use for monitoring human movement during exercises.
  • One such case is application of such devices for monitoring rehabilitation process post knee replacement operation.
  • the monitoring device typically consists of two sensors of which one is positioned near the top of the leg femur area and the other near the bottom of the tibia area.
  • the sensor wirelessly transmits movement data such as extension and flexion angles as well as the frequency of knee bending cycles to a data collection device for analysis.
  • the purpose of the rehabilitation exercises is regaining full leg extension and sufficient flexion to allow walking and standing up from a sitting position.
  • the monitoring sensors are either fixed by means of adhesives or
  • the objective of the invention presented herein is to provide an appliance for assisting patients who have undergone knee operation, such as knee replacement, in putting a movement sensor on the lower leg tibia area as far away from the operated knee as possible.
  • the invention resides in an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
  • an elongated hand grabber device having movable claws where each claw is capable of moving toward and away from one another;
  • the band when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
  • the appliance comprises:
  • the hand grabber device having pins attached to the claws; and b) the band having spaced apart shoulders rigidly attached to the band and the shoulders having pin accommodating holes therein, wherein the pins are adapted to fit within the holes of the shoulders so that as the claws move toward another the shoulders are caused to move toward one another which in turn causes the mouth of the c-shaped/u- shaped band to widen so that the band is able to fit and placed on the lower leg of the patient and further the pins are adapted to disengage from the holes when the claws are caused to move away from one another.
  • the hand grabber device comprises a movable linkage
  • the movable linkage mechanism is adapted to convert the linear movement of the rod to rotational movement of the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves linearly in a second direction opposite to the first direction the claws are caused to move away from one another in order to allow the band to return to an unexpanded state and allow the band to be released from the hand grabber device.
  • the rod is situated and extends through a tube where a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube such that linear sliding of the rod controls the movement of the movable linkage mechanism and the claws.
  • the movable linkage mechanism comprises:
  • each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube; and b) plurality of link elements where each link element is pivotally connected at one end to a respective claw and pivotally connected at the other end to a clevis that is rigidly connected to the first end of the rod.
  • a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
  • the tube has a handle that is situated on and adjacent the handle
  • the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube.
  • the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force to the shoulders of the band so as to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders.
  • the flexible material is made from plastic or spring steel.
  • the band is horse-shoe shaped.
  • the shape and configuration of the band is such that the legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient.
  • the band comprises a soft padding material to provide comfort when the band is worn on the lower leg.
  • the inventions resides in an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
  • an elongated hand grabber device having: i. plurality of movable claws where each claw is capable of moving toward and away from one another, the claws having pins attached to the claws;
  • a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube;
  • a movable linkage mechanism attached to and situated between the claws and the rod wherein the movable linkage mechanism is adapted to convert linear movement of the rod to rotational movement to the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves in a second direction the claws are caused to move away from one another in order to allow the band to return to an unexpanded state and allow the band to be released from the hand grabber device; and
  • a handle situated on and adjacent the second end of the tube the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube;
  • the band ii. plurality of spaced apart shoulders rigidly attached to the band, the shoulders having pin accommodating holes therein wherein the holes are adapted to accommodate the pins so that as the claws move toward another the shoulders are caused to move toward one another which in turn causes an open mouth of the c-shaped/u-shaped band to widen so that the band is able to fit and be placed on the lower leg of the patient and further the holes are adapted to allow the pins to disengage from the holes when the claws are caused to move away from another, wherein when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
  • the movable linkage mechanism comprises:
  • each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube;
  • a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
  • the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force the shoulders of the band so as to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders.
  • the flexible material is made from plastic or spring steel.
  • the band is horse-shoe shaped.
  • the shape and configuration of the band is such that legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient.
  • the band comprises a soft padding material to provide comfort when the band is worn on the lower leg.
  • the invention resides in a method of putting on a
  • the invention resides in a method of putting on a
  • Figure 1 is a perspective view of an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery in accordance with a preferred embodiment of the invention.
  • Figure 2 is a perspective view of the appliance shown in figure 1 prior to the sensor being applied to a leg.
  • Figure 3 is a perspective view of the appliance shown in figure 1 with the sensor in position to be applied to a leg.
  • Knee replacement surgery is commonly used to replace the damaged portions of the knee with plastic and metal parts or the whole joint with an artificial one. It requires a major surgery, hospitalization and rehabilitation. Due the growing demand for knee replacement surgery and increasing cost of providing medical services more and more patients undergo rehabilitation at home under occasional supervision of a physiotherapist.
  • the problem described above is solved with the appropriate horse shoe shaped band made of flexible material such as suitable plastic or spring steel equipped with at least two rigidly attached handles and a hand grabber device used for applying force to the handles in order for the band to open up which allows for putting it on the lower leg.
  • the band has a movement sensor attached to it.
  • a hand grabber device 21 such as the one shown in
  • Figures 1 to 3 is used for holding a band 1 by shoulders 2 rigidly attached to the band 1 in order to put it on the lower leg as shown in Fig 3, preferably above and adjacent to the ankle.
  • the band 1 is made from a flexible and expandable material, such as
  • the shape and configuration of the band 1 is such that the legs of the c-shape/u-shape band are able, due to the flexible and expandable nature of the band 1 , to expand outward when the band is about to be applied to the lower leg of a patient so that the portion of the lower leg fits within the band 1. Further the shape and configuration of the band 1 when in an unexpanded at rest state and applied to the lower leg of a patient, allows for the band 1 to contour and be retained to the lower leg of the patient.
  • the movement sensor 4 is attached to the band 1.
  • the band 1 is equipped with soft padding 3 which increases the comfort when the band 1 is attached and worn on the lower leg.
  • the shoulders 2 attached to the band have two holes near the free ends of the shoulders 2 in order to facilitate engagement with the claws 8 of the hand grabber device 21.
  • the claws 8 are equipped with pins 7 that fit into and engage with the holes in the shoulders 2 of the band 1.
  • the pins 7 are rigidly attached to claws 8 by rivets 6.
  • the claws 8 are released to disengage from the band 1.
  • the claws 8 are movably connected to arms 14 by rivets 15 at one end of the arms 14.
  • the other ends of the arms 14 are attached to tube 5.
  • the claws 8 are also movably connected to link elements 9.
  • the link elements 9 are movably connected to clevis 12 by means of rivet 11.
  • the clevis 12 is rigidly connected to rod 13 inserted into and through the tube 5.
  • a compressor spring is situated at the clevis end of said rod 13 so that the compressor spring allows controlled movement of the claws 8 from a band engaging position to a band release position.
  • the arms 14, link elements 9 and clevis 12 define a movable linkage mechanism in order transfer linear movement of the rod 13 to rotational movement of the claws 8. All the movably attached elements are separated by a spacer such as shown by 16.
  • a handle 17 is situated on the tube 5 adjacent an end of the tube 5 that is distal to the end of the tube that is adjacent the clevis 12.
  • a trigger lever 19 is pivotally attached via a pin 20 to the handle 17.
  • the trigger lever 19 is connected to the rod 13 such that activation of the trigger lever 19 causes the rod 13 to move linearly within the tube 5 where the linear movement of the rod 13 causes rotational movement of the claws 8, via the combined action of the compressor spring and the movable linkage mechanism, so that when the rod moves in one linear direction LE the claws 8 rotate toward one another to cause the shoulders 2 to move toward another so that the legs of the c-shaped/u-shaped band 1 expand outwardly from one another in order to open the mouth of the band wider so as to allow the band 1 to be placed and fit on the lower leg of a patient.
  • the trigger lever is released and the rod moves linearly in the opposite direction LR such that the legs of the c-shaped/u-shaped band 1 return to the unexpanded position and the claws 8 rotate away from each other so that the pins 7 disengage from the holes within the shoulders 2 to allow the hand grabber 21 to disengage from the band 1 so that the band 1 is retained on the lower leg of a patient.
  • the hand grabber 21 can also be used to remove a band from the lower leg of the patient.
  • the pins 7 of the claws 8 of the hand grabber 21 are aligned with the holes in the shoulder of the band 1 and then the rod 13 is caused by action of the trigger lever 19 to move linearly in the direction LE so that the pins enter within the holes of the shoulders 2 and cause the shoulders 2 to move toward one another and thus expanding the c-shaped/u-shaped legs whereby the band 1 is able to be removed from the lower leg of the patient.
  • a nut 18 is situated at the free end of said rod 13 and is used to set and allow for the control and adjustment of the length of movement of the rod 13 relative to the action of the trigger lever 19.
  • a method of placing said band 1 on the lower leg is demonstrated in Figures 2 & 3.
  • a preferred method comprising the steps of:

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Abstract

An appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery has an elongated hand grabber device (21) with movable claws (8). Each claw (8) can move toward and away from one another. A horse-shoe shaped band (1) with the sensor (4) attached thereon is removably attachable to the claws (8) of the hand grabber device (21). When the claws (8) are moved toward one another the band (1) expands so that the band (1) is able to be easily slid and fitted around the lower leg of a patient. When the claws (8) are moved away from one another the band (1) returns to its unexpanded state so that the band is retained on the leg. Further movement of the claws (8) away from one another allows the band (1) to disengage from the hand grabber device (21).

Description

Method and Appliance for Assisting Putting on Rehabilitation Monitoring Sensor
Post Knee Surgery
Technical Field
[0001] The present invention is in the area of rehabilitation equipment.
Background Art
[0002] Modern small form factor electronic devices such as gyroscopes,
magnetometers and accelerometers have seen increasing use for monitoring human movement during exercises. One such case is application of such devices for monitoring rehabilitation process post knee replacement operation.
[0003] The monitoring device typically consists of two sensors of which one is positioned near the top of the leg femur area and the other near the bottom of the tibia area. The sensor wirelessly transmits movement data such as extension and flexion angles as well as the frequency of knee bending cycles to a data collection device for analysis. The purpose of the rehabilitation exercises is regaining full leg extension and sufficient flexion to allow walking and standing up from a sitting position.
[0004] In order to achieve the full recovery it is important to begin rehabilitation exercises as soon as possible after the operation. One of the challenges with rehabilitation is the patient’s compliance especially in the case of rehabilitation at home with limited supervision by a physiotherapist. In this scenario the use of the monitoring appliance can not only motivate the patient to diligently perform the prescribed exercises but also allow the physiotherapist to objectively assess the patient’s progress.
[0005] The monitoring sensors are either fixed by means of adhesives or
strapped to the leg. Due to extensive post operational scars, swelling and pain around the knee area the sensors must be placed as far away from the scars as possible. However, the problem faced by patients, especially elderly ones who are the most likely to have knee replacement operation, is that due to very limited knee bending ability and often insufficient flexibility they cannot place the tibia sensor sufficiently far away from the swollen knee to avoid pain.
Definitions
[0006] It is acknowledged that the term‘comprise’ may, under varying
jurisdictions, be attributed with either an exclusive or an inclusive meaning. For the purpose of this specification, and unless otherwise noted, the term ‘comprise’ shall have an inclusive meaning - i.e. that it will be taken to mean an inclusion of not only the listed components it directly references, but also other non-specified components or elements. This rationale will also be used when the term‘comprised’ or 'comprising' is used in relation to one or more steps in a method or process.
Object of Invention
[0007] The objective of the invention presented herein is to provide an appliance for assisting patients who have undergone knee operation, such as knee replacement, in putting a movement sensor on the lower leg tibia area as far away from the operated knee as possible.
Summary of the Invention
[0008] In accordance with a first aspect the invention resides in an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
a) an elongated hand grabber device having movable claws where each claw is capable of moving toward and away from one another; and
b) a c-shaped/u-shaped band having the sensor attached thereon, the band is removably attachable to the claws of the hand grabber device,
wherein when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
[0009] Preferably, the appliance comprises:
a) the hand grabber device having pins attached to the claws; and b) the band having spaced apart shoulders rigidly attached to the band and the shoulders having pin accommodating holes therein, wherein the pins are adapted to fit within the holes of the shoulders so that as the claws move toward another the shoulders are caused to move toward one another which in turn causes the mouth of the c-shaped/u- shaped band to widen so that the band is able to fit and placed on the lower leg of the patient and further the pins are adapted to disengage from the holes when the claws are caused to move away from one another.
[0010] Preferably, the hand grabber device comprises a movable linkage
mechanism attached to and situated between the claws and a rod wherein the movable linkage mechanism is adapted to convert the linear movement of the rod to rotational movement of the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves linearly in a second direction opposite to the first direction the claws are caused to move away from one another in order to allow the band to return to an unexpanded state and allow the band to be released from the hand grabber device.
[0011] Preferably, the rod is situated and extends through a tube where a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube such that linear sliding of the rod controls the movement of the movable linkage mechanism and the claws.
[0012] Preferably, the movable linkage mechanism comprises:
a) plurality of elongate arms where each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube; and b) plurality of link elements where each link element is pivotally connected at one end to a respective claw and pivotally connected at the other end to a clevis that is rigidly connected to the first end of the rod.
[0013] Preferably, a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
[0014] Preferably, the tube has a handle that is situated on and adjacent the
second end of the tube, the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube.
[0015] Preferably, the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force to the shoulders of the band so as to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders.
[0016] Preferably, the flexible material is made from plastic or spring steel.
[0017] Preferably, the band is horse-shoe shaped.
[0018] Preferably, the shape and configuration of the band is such that the legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient.
[0019] Preferably, the band comprises a soft padding material to provide comfort when the band is worn on the lower leg.
[0020] In a second aspect the inventions resides in an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
a) an elongated hand grabber device having: i. plurality of movable claws where each claw is capable of moving toward and away from one another, the claws having pins attached to the claws;
ii. a tube through which a rod is situated and extends
through, a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube;
iii. a movable linkage mechanism attached to and situated between the claws and the rod wherein the movable linkage mechanism is adapted to convert linear movement of the rod to rotational movement to the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves in a second direction the claws are caused to move away from one another in order to allow the band to return to an unexpanded state and allow the band to be released from the hand grabber device; and
iv. a handle situated on and adjacent the second end of the tube, the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube; and
b) c-shaped/u-shaped band having:
i. the sensor attached thereon; and
ii. plurality of spaced apart shoulders rigidly attached to the band, the shoulders having pin accommodating holes therein wherein the holes are adapted to accommodate the pins so that as the claws move toward another the shoulders are caused to move toward one another which in turn causes an open mouth of the c-shaped/u-shaped band to widen so that the band is able to fit and be placed on the lower leg of the patient and further the holes are adapted to allow the pins to disengage from the holes when the claws are caused to move away from another, wherein when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
[0021] Preferably, the movable linkage mechanism comprises:
a) plurality of elongate arms where each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube; and
b) plurality of link elements where each link element is pivotally
connected at one end to a respective claw and pivotally connected at the other end to a clevis that is rigidly connected to the first end of the rod.
[0022] Preferably, a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
[0023] Preferably, the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force the shoulders of the band so as to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders.
[0024] Preferably, the flexible material is made from plastic or spring steel.
[0025] Preferably, the band is horse-shoe shaped.
[0026] Preferably, the shape and configuration of the band is such that legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient. [0027] Preferably, the band comprises a soft padding material to provide comfort when the band is worn on the lower leg.
[0028] In a third aspect the invention resides in a method of putting on a
rehabilitation monitoring sensor on the lower leg of a patient post knee surgery using the appliance as described in the first and second aspects, the method comprising the steps of:
a) placing the band on the hand grabber device by aligning and
positioning the shoulders of the band, via the holes in the shoulder, onto the pins of the claws;
b) positioning the appliance such that the claws of the hand grabber device are situated by and adjacent a lower portion of the leg; c) squeezing the trigger lever to move the rod linearly in the first
direction that causes the movable linkage mechanism to cause the claws to move toward one another such that the claws apply a force to the shoulders of the band so that the shoulders move toward each other so the band expands;
d) once the band has expanded, moving the appliance such that the band is slid on and fitted around the lower leg;
e) once the band is in position on the lower leg, releasing the trigger lever such that the rod moves in the second direction which in turn causes, via the movable linkage mechanism, the claws to move away from each other and the band returns to its unexpanded state so that the band is retained on the lower leg; and
f) moving the rod further in the second direction so that the pins of the claws disengage from the holes of the shoulder of the band releasing the band from the hand grabber device.
[0029] In a fourth aspect the invention resides in a method of putting on a
rehabilitation monitoring sensor on the lower leg of a patient post knee surgery using the appliance as described in the first and second aspects, the method comprising the steps of:
a) placing the band on the hand grabber device; b) positioning the appliance such that the portion of the hand grabber device with the band is situated by and adjacent a lower portion of the leg;
c) expanding the band such that the band is able to fit over and onto the lower portion of the leg;
d) placing the band on the lower portion of the leg;
e) releasing the band from the hand grabber device such that band returns to an unexpanded state so as to be retained on the lower portion of the leg; and
f) moving the hand grabber device away from the lower portion of the leg.
[0030] Any other aspects herein described
Brief Description
[0031] The invention will now be described, by way of example only, by reference to the accompanying drawings:
[0032] Figure 1 is a perspective view of an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery in accordance with a preferred embodiment of the invention.
[0033] Figure 2 is a perspective view of the appliance shown in figure 1 prior to the sensor being applied to a leg.
[0034] Figure 3 is a perspective view of the appliance shown in figure 1 with the sensor in position to be applied to a leg.
Description of the Preferred Embodiments)
[0035] The following description will describe the invention in relation to a
preferred embodiment of the invention, typically an appliance for assisting putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery. The invention is in no way limited to the preferred embodiment as it is purely to exemplify the invention only and that possible variations and modifications would be readily apparent without departing from the scope of the invention. [0036] Knee replacement surgery is commonly used to replace the damaged portions of the knee with plastic and metal parts or the whole joint with an artificial one. It requires a major surgery, hospitalization and rehabilitation. Due the growing demand for knee replacement surgery and increasing cost of providing medical services more and more patients undergo rehabilitation at home under occasional supervision of a physiotherapist.
In order to improve the effectiveness of rehabilitation it is possible to monitor the frequency and type of exercises the patient does and collect data such as extension and flexion angles. Several companies e.g. Claris Reflex (Canada), TracPatch (USA), BPMpathway (UK) and others offer leg movement monitoring products. These solutions suffer from a problem due to the way they are attached to the lower leg which is usually quite close to the swollen and painful knee area. This precludes using wearable leg movement sensors during early stages of recovery, very often for several weeks. Putting the lower leg sensor closer to the ankle poses a physical challenge due to initially limited flexion of the knee joint and general flexibility problem, especially in older patients who are most likely to undergo a knee replacement surgery.
[0037] The problem described above is solved with the appropriate horse shoe shaped band made of flexible material such as suitable plastic or spring steel equipped with at least two rigidly attached handles and a hand grabber device used for applying force to the handles in order for the band to open up which allows for putting it on the lower leg. The band has a movement sensor attached to it.
[0038] Turning now to figures 1 to 3 which present an example embodiment of the invention and the method of its application.
[0039] As used herein a hand grabber device 21 such as the one shown in
Figures 1 to 3 is used for holding a band 1 by shoulders 2 rigidly attached to the band 1 in order to put it on the lower leg as shown in Fig 3, preferably above and adjacent to the ankle.
[0040] The band 1 is made from a flexible and expandable material, such as
plastic or spring steel, and is c-shaped/u-shaped, preferably horse-shoe shaped. The shape and configuration of the band 1 is such that the legs of the c-shape/u-shape band are able, due to the flexible and expandable nature of the band 1 , to expand outward when the band is about to be applied to the lower leg of a patient so that the portion of the lower leg fits within the band 1. Further the shape and configuration of the band 1 when in an unexpanded at rest state and applied to the lower leg of a patient, allows for the band 1 to contour and be retained to the lower leg of the patient. The movement sensor 4 is attached to the band 1. The band 1 is equipped with soft padding 3 which increases the comfort when the band 1 is attached and worn on the lower leg.
[0041] The shoulders 2 attached to the band have two holes near the free ends of the shoulders 2 in order to facilitate engagement with the claws 8 of the hand grabber device 21. The claws 8 are equipped with pins 7 that fit into and engage with the holes in the shoulders 2 of the band 1. The pins 7 are rigidly attached to claws 8 by rivets 6. Once the band 1 is placed on the lower leg the claws 8 are released to disengage from the band 1. The claws 8 are movably connected to arms 14 by rivets 15 at one end of the arms 14. The other ends of the arms 14 are attached to tube 5. The claws 8 are also movably connected to link elements 9. The link elements 9 are movably connected to clevis 12 by means of rivet 11. The clevis 12 is rigidly connected to rod 13 inserted into and through the tube 5. A compressor spring is situated at the clevis end of said rod 13 so that the compressor spring allows controlled movement of the claws 8 from a band engaging position to a band release position. The arms 14, link elements 9 and clevis 12 define a movable linkage mechanism in order transfer linear movement of the rod 13 to rotational movement of the claws 8. All the movably attached elements are separated by a spacer such as shown by 16.
[0042] A handle 17 is situated on the tube 5 adjacent an end of the tube 5 that is distal to the end of the tube that is adjacent the clevis 12. A trigger lever 19 is pivotally attached via a pin 20 to the handle 17. The trigger lever 19 is connected to the rod 13 such that activation of the trigger lever 19 causes the rod 13 to move linearly within the tube 5 where the linear movement of the rod 13 causes rotational movement of the claws 8, via the combined action of the compressor spring and the movable linkage mechanism, so that when the rod moves in one linear direction LE the claws 8 rotate toward one another to cause the shoulders 2 to move toward another so that the legs of the c-shaped/u-shaped band 1 expand outwardly from one another in order to open the mouth of the band wider so as to allow the band 1 to be placed and fit on the lower leg of a patient. Once the band 1 is placed and situated on the lower leg the trigger lever is released and the rod moves linearly in the opposite direction LR such that the legs of the c-shaped/u-shaped band 1 return to the unexpanded position and the claws 8 rotate away from each other so that the pins 7 disengage from the holes within the shoulders 2 to allow the hand grabber 21 to disengage from the band 1 so that the band 1 is retained on the lower leg of a patient. The hand grabber 21 can also be used to remove a band from the lower leg of the patient. The pins 7 of the claws 8 of the hand grabber 21 are aligned with the holes in the shoulder of the band 1 and then the rod 13 is caused by action of the trigger lever 19 to move linearly in the direction LE so that the pins enter within the holes of the shoulders 2 and cause the shoulders 2 to move toward one another and thus expanding the c-shaped/u-shaped legs whereby the band 1 is able to be removed from the lower leg of the patient. A nut 18 is situated at the free end of said rod 13 and is used to set and allow for the control and adjustment of the length of movement of the rod 13 relative to the action of the trigger lever 19. A method of placing said band 1 on the lower leg is demonstrated in Figures 2 & 3. A preferred method comprising the steps of:
a) placing the band 1 on the hand grabber device 21 by aligning and positioning the shoulders 2 of the band 1 , via the holes in the shoulder 2, onto the pins 7 of the claws 8;
b) positioning the appliance such that the claws 8 of the hand grabber device 21 are situated by and adjacent a lower portion of the leg; c) squeezing the trigger lever 19 to move the rod 13 linearly in the first direction LR that causes the movable linkage mechanism 9, 12, 14 to cause the claws 8 to move toward one another such that the claws 8 apply a force to the shoulders 2 of the band 1 so that the shoulders 2 move toward each other so the band 1 expands;
d) once the band 1 has expanded, moving the appliance such that the band 1 is slid on and fitted around the lower leg;
e) once the band 1 is in position on the lower leg, releasing the trigger lever 19 such that the rod 13 moves in the second direction LE which in turn causes, via the movable linkage mechanism causes the claws 8 to move away from each other and the band 1 returns to its unexpanded state so that the band 1 is retained on the lower leg; and
f) moving the rod 13 further in the second direction LE so that the pins 7 of the claws 8 disengage from the holes of the shoulder 2 of the band 1 releasing the band 1 from the hand grabber device.
Industrial applicability
[0043] The application of the present invention is in monitoring post knee
rehabilitation process aimed at restoring full range of knee motion in terms of flexion and extension.

Claims

Claims:
[0044] Claim 1 : An appliance for assisting putting on a rehabilitation
monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
a) an elongated hand grabber device having movable claws where each claw is capable of moving toward and away from one another; and
b) a c-shaped/u-shaped band having the sensor attached thereon, the band is removably attachable to the claws of the hand grabber device,
wherein when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
[0045] Claim 2: The appliance as claimed in claim 1 , wherein the appliance comprises:
a) the hand grabber device having pins attached to the claws; and b) the band having spaced apart shoulders rigidly attached to the band and the shoulders having pin accommodating holes therein, wherein the pins are adapted to fit within the holes of the shoulders so that as the claws move toward one another the shoulders are caused to move toward one another which in turn causes the mouth of the c-shaped/u- shaped band to widen so that the band is able to fit and be placed on the lower leg of the patient and further the pins are adapted to disengage from the holes when the claws are caused to move away from another.
[0046] Claim 3: The appliance as claimed in claim 2, wherein the hand
grabber device comprises a movable linkage mechanism attached to and situated between the claws and a rod, wherein the movable linkage mechanism is adapted to convert the linear movement of the rod to rotational movement of the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves linearly in a second direction opposite to the first direction the claws are caused to move away from one another in order to allow the band to return to an unexpanded state and allow the band to be released from the hand grabber device.
[0047] Claim 4: The appliance as claimed in claim 3, wherein the rod is
situated and extends through a tube where a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube such that linear sliding of the rod controls the movement of the movable linkage mechanism and the claws.
[0048] Claim 5: The appliance as claimed in claim 4, wherein the movable linkage mechanism comprises:
a) plurality of elongate arms where each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube; and
b) plurality of link elements where each link element is pivotally
connected at one end to a respective claw and pivotally connected at the other end to a clevis that is rigidly connected to the first end of the rod.
[0049] Claim 6: The appliance as claimed in claim 5, wherein a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
[0050] Claim 7: The appliance as claimed in claim 6, wherein tube has a
handle that is situated on and adjacent the second end of the tube, the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube.
[0051] Claim 8: The appliance as claimed in claim 7, wherein the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force to the shoulders of the band so as to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders. [0052] Claim 9: The appliance as claimed in claim 8, wherein the flexible material is made from plastic or spring steel.
[0053] Claim 10: The appliance as claimed in claim 9, wherein the band is
horse-shoe shaped.
[0054] Claim 11 : The appliance as claimed in claim 10, wherein the shape and configuration of the band is such that legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient.
[0055] Claim 12: The appliance as claimed in claim 11 , wherein the band
comprises a soft padding material to provide comfort when the band is worn on the lower leg.
[0056] Claim 13: An appliance for assisting putting on a rehabilitation
monitoring sensor on the lower leg of a patient post knee surgery, the appliance comprises:
a) an elongated hand grabber device having:
i. plurality of movable claws where each claw is capable of moving toward and away from one another, the claws having pins attached to the claws;
ii. a tube through which a rod is situated and extends
through, a first end of the rod protrudes outward from a first end of the tube and a second end of the rod protrudes outward from a second end of the tube, the rod is adapted to slide linearly relative to the tube;
iii. a movable linkage mechanism attached to and situated between the claws and the rod wherein the movable linkage mechanism is adapted to convert linear movement of the rod to rotational movement of the claws such that when the rod moves linearly in a first direction the claws are caused to move toward one another in order to cause the band to expand and when the rod moves in a second direction the claws are caused to move away from one another in order to allow the band to return to an
unexpanded state and allow the band to be released from the hand grabber device; and
iv. a handle situated on and adjacent the second end of the tube, the handle comprises a trigger lever that is pivotally attached to the handle and connected to the rod such that activation of the trigger lever causes the rod to move linearly within the tube; and
b) c-shaped/u-shaped band having:
i. the sensor attached thereon; and
ii. plurality of spaced apart shoulders rigidly attached to the band, the shoulders having pin accommodating holes therein wherein the holes are adapted to accommodate the pins so that as the claws move toward another the shoulders are caused to move toward one another which in turn causes an open mouth of the c-shaped/u-shaped band to widen so that the band is able to fit and be placed on the lower leg of the patient and further the holes are adapted to allow the band to disengage from the holes when the claws are caused to move away from another, wherein when the claws of the hand grabber device are caused to move toward one another the band is adapted to expand so as to allow the band to easily slide and fit around the lower leg of a patient and when the claws are caused to move away from one another the band is adapted to return to an unexpanded state and to be detached from the hand grabber device.
[0057] Claim 14: The appliance as claimed in claim 13, wherein the movable linkage mechanism comprises:
a) plurality of elongate arms where each arm is pivotally connected at one end to a respective claw and connected at the other end to the first end of the tube; and
b) plurality of link elements where each link element is pivotally
connected at one end to a respective claw and pivotally connected at the other end to a clevis that is rigidly connected to the first end of the rod.
[0058] Claim 15: The appliance as claimed in claim 14, wherein a compressor spring is situated at the clevis end of said rod where the compressor spring is adapted to control the linear movement of the rod.
[0059] Claim 16: The appliance as claimed in claim 15, wherein the band is made from flexible material so that the band is able to expand when the claws of the hand grabber device are caused to apply a force the shoulders of the band to cause the shoulders to move toward each other and where the band is able to return to an unexpanded state when the claws are not applying a force to the shoulders.
[0060] Claim 17: The appliance as claimed in claim 16, wherein the flexible material is made from plastic or spring steel.
[0061] Claim 18: The appliance as claimed in claim 17, wherein the band is horse-shoe shaped.
[0062] Claim 19: The appliance as claimed in claim 18, wherein the shape and configuration of the band is such that legs of the horse-shoe are able to expand outward to increase the size of the mouth of the horse-shoe in order to allow the band to slide and fit on the lower leg of the patient and such that the legs of the horse-shoe are able to return to the unexpanded state once the band is placed on the lower leg of the patient.
[0063] Claim 21 : The appliance as claimed in claim 20, wherein the band
comprises a soft padding material to provide comfort when the band is worn on the lower leg.
[0064] Clam 22: A method of putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery using the appliance as claimed in any one of claims 1 to 21 , the method comprising the steps of:
a) placing the band on the hand grabber device by aligning and
positioning the shoulders of the band, via the holes in the shoulder, onto the pins of the claws;
b) positioning the appliance such that the claws of the hand grabber device are situated by and adjacent a lower portion of the leg; c) squeezing the trigger lever to move the rod linearly in the first direction that causes the movable linkage mechanism to cause the claws to move toward one another such that the claws apply a force to the shoulders of the band so that the shoulders move toward each other so the band expands;
d) once the band has expanded, moving the appliance such that the band is slid on and fitted around the lower leg;
e) once the band is on the lower leg releasing the trigger lever such that the rod moves in the second direction which in turn causes, via the movable linkage mechanism, the claws to move away from each other and the band returns to its unexpanded state so that the band is retained on the lower leg; and
f) moving the rod further in the second direction so that the pins of the claws disengage from the holes of the shoulder of the band releasing the band from the hand grabber device.
[0065] Clam 23: A method of putting on a rehabilitation monitoring sensor on the lower leg of a patient post knee surgery using the appliance as claimed in any one of claims 1 to 21 , the method comprising the steps of:
g) placing the band on the hand grabber device;
h) positioning the appliance such that the portion of the hand grabber device with the band is situated by and adjacent a lower portion of the leg;
i) expanding the band such that band is able to fit over and onto the lower portion of the leg;
j) placing the band on the lower portion of the leg;
k) releasing the band from the hand grabber device such that the band returns to an unexpanded state so as to be retained on the lower portion of the leg; and
L) moving the hand grabber device away from the lower portion of the leg.
PCT/AU2019/051193 2018-10-31 2019-10-30 Method and appliance for assisting putting on rehabilitation monitoring sensor post knee surgery WO2020087120A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2018904151A AU2018904151A0 (en) 2018-10-31 Method and Appliance for Assisting Putting on Rehabilitation Monitoring Sensor Post Knee Surgery
AU2018904151 2018-10-31

Publications (1)

Publication Number Publication Date
WO2020087120A1 true WO2020087120A1 (en) 2020-05-07

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ID=70461800

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Application Number Title Priority Date Filing Date
PCT/AU2019/051193 WO2020087120A1 (en) 2018-10-31 2019-10-30 Method and appliance for assisting putting on rehabilitation monitoring sensor post knee surgery

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Country Link
WO (1) WO2020087120A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070035144A1 (en) * 2005-08-12 2007-02-15 Reid Industries Pick up device with locking mechanism and leverage action trigger
US20100102583A1 (en) * 2008-10-24 2010-04-29 Mccoy Cody Extendible reacher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070035144A1 (en) * 2005-08-12 2007-02-15 Reid Industries Pick up device with locking mechanism and leverage action trigger
US20100102583A1 (en) * 2008-10-24 2010-04-29 Mccoy Cody Extendible reacher

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