CN87106548A

CN87106548A - The apparatus and method that anti-blood post forms

Info

Publication number: CN87106548A
Application number: CN 87106548
Authority: CN
Inventors: 布赖恩·韦尔斯利·霍尔特
Original assignee: Brija Pty Ltd (au) 216 Willoughby Road Naremburn New South Wales 2065 Austr
Current assignee: Brija Pty Ltd (au) 216 Willoughby Road Naremburn New South Wales 2065 Austr
Priority date: 1986-09-24
Filing date: 1987-09-23
Publication date: 1988-04-06

Abstract

A kind of preventive measure that prevents to be unable to leave the bed patient's shank generation venous thrombosis comprises the foot (11) and shank bottom (10) that a kind of device with two main parts around pivot swinging (3 and 4) is installed to successively patient, and this equipped with motive driving device (14) couples together swing with the pressure dorsiflex that realizes patient's ankle and passive loosely promote the venous blood circulation by pressure between the lacuna of (muscle) in patient's lower limb with this two main part.

Description

The present invention relates to a kind of apparatus and method by mechanical means prevention venous thrombosis.

Prevent that it is a problem deserving of attention that bedfast patient suffers from phlebothrombosis.For example in hospital, find some surgical procedures, comprise lower limb orthopedics, with unusual high operation posterior vein thromboembolism disease, the i.e. sickness rate of venous thrombosis or pulmonary infarction.Adopt several preventive measures at present, comprise the basic prevention of using medicine or physical method.The latter adopts a kind of hoop newer, that be made up of the multistage endless belt at patient's shank and the pneumatic shuttle on the thigh.Having a kind of is that thigh Duan Ze has two to shank Duan Yousi around air chamber.Apply air pressure, two sections air chamber begins sequential expansion from ankle, thereby promotes that blood flows to the deep Venous system.These endless belt have reduced the sickness rate of dvt through testing continuous use on one's body the patients after surgery.This method finds to have simultaneously physics and pharmacological effect, do not bleed dangerous and in fact being free from side effects.Though compressed air is often supplied with operating room and intensive care unit, seldom supply public ward, do not have at home certainly.

Main purpose of the present invention be to provide a kind of effectively and connect the device that mechanical preventing thrombosis that a handy power supply can operate forms.

The invention provides the device that a kind of preventing thrombosis forms, being used for installing on patient's the shank causes the Calf muscle repeated compression to help the deep venous circulation, this device comprises one first main component, this main component is installed to the device of patient's shank bottom, one second main component is pivotably connected on this first main component with the foot combination with patient, drive link is located at that to be used for actuating with patient's ankle axis between this first and second main component be the oscillating motion at center, and has and be contained in the power set that are used for actuating this drive link in this first main component.

Effect of the present invention has been to realize that the ratio of pressure on average is about 9: 1 to ankle between lacuna bending under the complete passive dorsiflex state and at the complete passive end in the Calf muscle under the state behind the deep, and thisly changes and realized that suitable deep venous circulation prevents thrombosis by repeating the kinetic pressure of ankle.

Therefore, the present invention also provides a kind of method that prevents to be unable to leave the bed patient's shank generation venous thrombosis, it comprises a device that has therebetween with two hinge body members of oscillatory gearing mechanism is installed to patient's the foot and the step of shank bottom, and thereby bend and moves repeatedly to realize patient's shank (muscle) with dorsiflex the pressure mobile step of promotion lower limb inner blood that rises and falls between lacuna at the end of forcing to realize patient's ankle.

The present invention will illustrate in greater detail in conjunction with the accompanying drawings by most preferred embodiment, wherein:

Fig. 1 is the perspective view that is connected to the device of the present invention on the user foot;

Fig. 2 is the profile of Fig. 1 II-II along the line;

Fig. 3 is the perspective view of this device internal drive;

Fig. 4 is the block diagram of its electronic-controlled installation.

Referring to Fig. 1 and Fig. 2, the inventive system comprises one and go up main part 3, main part 4 links together by following down with its

main part

3 and 4 carriages in aggregates, that face mutually to 5 and 6 separately for it, and every pair interconnects at its far-end 7 and 8

usefulness trunnions.Part

3 and 4 all is the trough-shaped housing of thermoplastic, and its profile is made the shank 10 and foot 11(Fig. 1 to small part that can encase user).Preferably is furnished with the elastic substrate (not shown) in the last main part 3.Relatively carriage 6 extends laterally from the bottom 17 of last

main part

3, and 5 on the relative carriage of face erects from main part down.

Carriage

5 and 6 position and length are to make surely the position of each trunnion 9 approximately corresponding to user ankle center like this.Frenulum 12 will be gone up on the shank 10 that main part 3 is fixed to user securely.Frenulum 13 then will descend main part 4 to be fixed on the foot 11.Frenulum 12 and 13 can comprise the tightening device of velcro formula.

Therefore can be from seeing, rotating down around trunnion 9, main part 4 can make foot 11 bend activity between the position in the passive dorsiflex and the end, therefore foot 11 can be swung between these positions with the outer room media, and this can be by means of on the heel 15 that is fixed on down main part 4 and by being contained in drive link 14(Fig. 2 that the intravital driving device 16 of main part 3 shells is actuated) measure realize.Driving device 16 shown in Figure 3 can comprise a motor 17 of linking drive link 14 by a rotating driveshaft 18.Driving shaft 18 rotatably is contained in the bearing 19 and is furnished with a screw thread mid portion 21 at the axle journal of its far-end 20.Tapped follower 22 usefulness thread connecting mode are received on the threaded portion 21 of axle 18 and are driven connecting rod 14 and retraining and can not rotate, can only be axially movable along axle 18 along with the rotation of axle 18.Follower 22 axial active directions are decided by the rotation direction of axle 18.Drive link 14 preferably includes along the metal sheet 24 of a narrow groove 25 at last main part 3 intrinsic displacements, the one end is furnished with the yoke 23 that is wrapping follower 22, and the other end then is furnished with an analog bracket 26 and is used for being connected on the s heel portion 15 on the following main part 4 of this device.Follower 22 makes drive link 14 have two main parts 3 and the required rectilinear motion with respect to follower 22 to a certain degree of 4 swings by connecting with yoke 23 along the pin 27 of 28 displacements of the groove on the yoke.

Motor 17 can be controlled by the electronic installation that will describe later on and reverse, main part 4 with respect to the scope of the swing of main part 3 can with one group of microswitch 29 corresponding to yoke 23 with the motion of a cam 30 decide.Driving shaft 18 is divided into two, and being connected with each other with a cushion packing 31 is applied to impact on the motor 17 to reduce patient's muscle response as far as possible.Electronic-controlled installation is contained on the printed circuit board 32 that is positioned at the last main part 3 of this device.

Therefore after motor 17 energisings, drive link 14 promptly produces reciprocating motion, repeats to force dorsiflex for the foot 11 of user.This device can be used in all places of hospital, even can be used for home care, because it drives with common civil power.The result can keep the deep venous circulation in patient's shank, avoid developing into phlebothrombosis.At least in some cases, patient loads onto one device on two lower limbs.Can see, alternately, simultaneously or other relevant operations all need mutual timing.Preferably the position of rest that operates in of each device all has a pause, and has timing, speed and the degree of control

main part

3 and 4 swings.Be about one minute the hunting period of common device of the present invention, continues one minute approximately and pause.

Fig. 4 illustrates the block diagram of the electronic installation of control motor 17.This circuit is to be used for making dedicated microprocessor device that operation adapts to most humans based on one.This circuit comprises a motor drive circuit that is connected with microprocessor 35 33 and position feedback transducer 34.This pick off 34 can detect the current position of patient's foot 11 with respect to a center or " stopping " position, this just makes this device locate before patient loads onto, and suitable words can be synchronous with the controller (not shown) of linking the another foot.

Sequence switch 36 can change with respect to the stroke of the motion of the both direction of position of rest and speed.Normally preset by a standard level this position, but allow to change the needs that adapt to each patient and make patient comfort.

In the postoperative application of the overwhelming majority, two feet of patient all need to load onto this device.For fear of causing patient's discomfort, these two devices are wanted synchronously.These two devices can be operated by same action, and promptly bipod is all movable with speed in the same way, the perhaps anti-phase activity of bipod, and a foot is upwards moving and another foot is moving downwards.This control is to obtain from sync cap 38.This matching requirements external power 37 is taken appropriate insulation and pertinent regulations into account.

Provide and detected stall and the fault of judging motor 17.Also provide control measure, allow patient can short-term when feeling well have a rest motion to patient.This control can be depended on the needs by nursing staff's restriction or constraint.A gauge tap 39 can be contained on the end of main part, but preferably connects to get at the place easily to a patient with cable.Control circuit uses the low power CMOS device to reduce power consumption as far as possible and resists external interference.

Though described a most preferred embodiment in front in the chapters and sections, should be appreciated that within the scope of the invention other form, modification and improvement all are feasible.

Claims

1, a kind of preventing thrombosis forms device, it is characterized in that being used for installing on patient's the shank causes the Calf muscle repeated compression to help the deep venous circulation, this device comprises one first main component, this main component is installed to the device of patient's shank bottom, one second main component is pivotably connected on this first main component with the foot combination with patient, drive link is located at that to be used for actuating with patient's ankle axis between this first and second main component be the oscillating motion at center, and has and be contained in the power set that are used for actuating this drive link in this first main component.

2, a kind of preventing thrombosis by claim 1 forms device, it is characterized in that this second main component has a s heel portion and is used for part around patient's heel, and drive link is connected on this s heel portion.

3, a kind of preventing thrombosis by claim 1 or 2 forms device, it is characterized in that these power set are reversible motor, actuate drive link by the rotation of driving shaft.

4, a kind of preventing thrombosis by claim 3 forms device, it is characterized in that this driving shaft has a threaded portion, and have a threaded follower also to transmit rectilinear motion for this drive link to drive this drive link by the rotation of driving shaft with this part combination.

5, each a kind of preventing thrombosis by the aforesaid right requirement forms device, it is characterized in that also comprising that the power that an electronic circuit control these power set applies, and comprises the device of the standard of this oscillating motion that is used for selecting this main component.

6, a kind of preventing thrombosis by claim 5 forms device, it is characterized in that this electronic circuit comprises that also device is used for realizing that the oscillating motion of this device is synchronous by predetermined way with the oscillating motion of this another device when the every lower limb of patient is adorned this device.

7, one is used for preventing being unable to leave the bed to take place on patient's shank the method for venous thrombosis, it is characterized in that comprising a device that has therebetween with two hinge body members of oscillatory gearing mechanism is installed on patient's the foot and shank bottom, and bend at the end of forcing to realize patient's ankle and dorsiflex is moved repeatedly to realize patient's shank (muscle) thus pressure rises and falls and promotes the lower limb inner blood mobile between lacuna.

8,, it is characterized in that this moves repeatedly and in each circulation of patient's ankle being forced patient's foot motion that the dorsiflex and the end bend the pause of stopping is arranged later by the method for claim 7.

9, by claim 7 or 8 method, it is characterized in that this repeatedly controlled movement system be contained on another foot of patient have therebetween with the motion repeatedly of another device of two hinge body members of oscillatory gearing mechanism synchronous by predetermined way.

10,, when it is characterized in that this patient's foot motion circulation accounts for one minute, continued one minute and should pause by the method for claim 8.