AU2021101103A4 - A bone cement negative pressure stirring device - Google Patents

A bone cement negative pressure stirring device Download PDF

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Publication number
AU2021101103A4
AU2021101103A4 AU2021101103A AU2021101103A AU2021101103A4 AU 2021101103 A4 AU2021101103 A4 AU 2021101103A4 AU 2021101103 A AU2021101103 A AU 2021101103A AU 2021101103 A AU2021101103 A AU 2021101103A AU 2021101103 A4 AU2021101103 A4 AU 2021101103A4
Authority
AU
Australia
Prior art keywords
negative pressure
bone cement
stirring blade
cross
filter
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
AU2021101103A
Inventor
Sheng Li
Xu Li
Jianning Liu
Xinzhe Ma
Xiangbei Qi
Hui Sun
Wei Wang
Feng Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Third Hospital of Hebei Medical University
Original Assignee
Third Hospital Of Hebei Medical Univ
Third Hospital of Hebei Medical University
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
Application filed by Third Hospital Of Hebei Medical Univ, Third Hospital of Hebei Medical University filed Critical Third Hospital Of Hebei Medical Univ
Priority to AU2021101103A priority Critical patent/AU2021101103A4/en
Application granted granted Critical
Publication of AU2021101103A4 publication Critical patent/AU2021101103A4/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/75425—Discharge mechanisms characterised by the means for discharging the components from the mixer using pistons or plungers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0725—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis on the free end of the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
    • B01F33/50112—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held of the syringe or cartridge type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3204—Motor driven, i.e. by means of an electric or IC motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7174—Feed mechanisms characterised by the means for feeding the components to the mixer using pistons, plungers or syringes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/718—Feed mechanisms characterised by the means for feeding the components to the mixer using vacuum, under pressure in a closed receptacle or circuit system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/20—Mixing of ingredients for bone cement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Prostheses (AREA)

Abstract

The utility model relates to a bone cement negative pressure stirring device, which comprises a bone cement mixing mechanism, a negative pressure suction mechanism and a power mechanism. The bone cement mixing mechanism consists of an outer sleeve with an injection joint at the top end and a stirrer arranged in the outer sleeve, wherein the stirrer consists of a stirring blade, a stirring shaft, a rubber piston and a cross-shaped rotating handle which are fixedly connected in sequence. The power mechanism is that the output shaft of the motor is provided with a rotating shaft with a cross-shaped clamp seat. The negative pressure suction mechanism is characterized in that a hose is connected at the negative pressure joint of the negative pressure suction machine, the tail end of the hose is connected with the outlet end of a filter, and the inlet end of the filter is connected with the injection joint. A breathable leak-proof filter screen is arranged in the filter. The utility model not only has simple structure and low production cost, but also can stir the bone cement in negative pressure environment, which is simple to operate, avoids the pollution problem during manual mixing, and reduces the problem of bubbles generated by mixed air in the bone cement. 2/3 3 4 8 Fig. 2 is a schematic structural diagram of the mixing mechanism of the utility model.

Description

2/3
3
4
8
Fig. 2 is a schematic structural diagram of the mixing mechanism of the utility model.
A bone cement negative pressure stirring device
TECHNICAL FIELD
The utility model relates to a bone cement preparation device, in particular to a bone
cement negative pressure stirring device.
BACKGROUND
With the aging of the population, the incidence of vertebral compression fractures (VCFs)
is getting higher and higher. In order to improve patients' symptoms, many treatments
have emerged, among which percutaneous kyphoplasty (PKP) and percutaneous
vertebroplasty (PVP) are more and more widely used. Because of its low viscosity,
polymethylmethacrylate bone cement can be injected into fractured vertebral body
through pedicle of vertebral arch, providing new support for vertebral body, increasing
stability of vertebral body, and relieving pain of patients to a great extent.
Usually, the mixing of bone cement is carried out manually in a container with a stirring
rod, which is prone to uneven mixing, difficult to control the viscosity, and air bubbles
mixed in the bone cement, which leads to the unsatisfactory effect of the bone cement
filled into the vertebral body.
SUMMARY
The purpose of this utility model is to provide a bone cement negative pressure stirring
device, which solves the problem that the biomechanical properties of bone cement are
influenced by bubbles easily caused by uneven stirring when manually stirring bone
cement.
The purpose of the utility model is realized as follows:
A bone cement negative pressure stirring device comprises a bone cement mixing
mechanism, a negative pressure suction mechanism and a power mechanism. The bone
cement mixing mechanism consists of an outer sleeve with an injection joint at the top
end and a stirrer arranged in the outer sleeve, wherein the stirrer consists of a stirring
blade, a stirring shaft, a rubber piston and a cross-shaped rotating handle which are
fixedly connected in sequence.
The power mechanism is characterized in that an output shaft of a motor is provided with
a rotating shaft with a cross-shaped clamp seat, and the lower end of the cross-shaped
rotating handle is arranged in the cross-shaped clamp seat of the rotating shaft.
The negative pressure suction mechanism is connected with a hose at the negative
pressure joint of the negative pressure suction machine, the tail end of the hose is
connected with the outlet end of a filter, and the inlet end of the filter is connected with
the injectionjoint. A breathable leak-proof filter screen is arranged in the filter.
In the bone cement negative pressure stirring device, the stirring blades have a cross
structure and are composed of a first stirring blade and a second stirring blade, wherein
the first stirring blade is composed of two isosceles triangular sub-blades which are
symmetrically arranged and the outer half of the sub-blades are turned up by 30-60
degrees, and the second stirring blade is composed of two isosceles triangular sub-blades
which are symmetrically arranged and turned down by 30-60 degrees.
Preferably, in the bone cement negative pressure stirring device, the sub-blades of the
first stirring blade are tilted backward by 0-15 degrees relative to the rotation direction, and the sub-blades of the second stirring blade are tilted backward by 0-15 degrees relative to the rotation direction.
The utility model has the advantages that the existing bone cement vacuum stirring
device has complex structure, high cost and long preparation time, and a large amount of
bone cement remains in the device, resulting in waste. The utility model not only has
simple structure and low production cost, but also can stir the bone cement in negative
pressure environment, which is simple to operate, avoids the pollution problem during
manual mixing, and reduces the problem of bubbles generated by mixed air in the bone
cement.
DESCRIPTION OF THE FIGURES
Fig. 1 is a schematic diagram of the overall structure of the utility model.
Fig. 2 is a schematic structural diagram of the mixing mechanism of the utility model.
Fig. 3 is a schematic diagram of the stirrer structure of the utility model.
In the figure: 1. Outer sleeve, 2. Leak-proof filter screen, 3. Injection joint, 4. First
stirring blade, 5. Second stirring blade, 6. Mixing shaft, 7. Rubber piston, 8. Cross-shaped
rotating handle, 9. Negative pressure suction machine, 10. Motor, 11. Hose, 12. Rotating
shaft.
DESCRIPTION OF THE INVENTION
The bone cement negative pressure stirring device of the utility model comprises a bone
cement mixing mechanism, a negative pressure suction mechanism and a power
mechanism.
As shown in fig. 1, the bone cement mixing mechanism is composed of an outer sleeve 1
and a stirrer arranged in the outer sleeve 1. The outer sleeve 1 is a cylindrical body with
an open lower end and an injection joint 3 at the upper end. The stirrer is inserted into the
outer sleeve 1. The stirrer is composed of stirring blades, a stirring shaft 6, a rubber piston
7 and a cross-shaped rotating handle 8 which arefixedly connected in sequence, wherein
the whole stirring blade has a cross-shaped structure (as shown in fig. 3) and is composed
of a first stirring blade 4 and a second stirring blade 5. The first stirring blade 4 is
composed of two symmetrically arranged isosceles triangular sub-blades, the outer half of
which is turned up by 30-60 degrees (as shown in fig. 2), and the second stirring blade 5
is also composed of two symmetrically arranged isosceles triangular sub-blades, the outer
half of which is turned down by 30-60 degrees (as shown in fig. 2).
As a better embodiment, as shown in fig. 3, the sub-blades of the first stirring blade 4 are
tilted backward by 10 degrees relative to the rotation direction, and the sub-blades of the
second stirring blade 5 are tilted backward by 0-15 degrees relative to the rotation
direction, so that the bone cement can be mixed more uniformly and quickly.
In the power mechanism, the output shaft of the motor 10 is provided with a rotating shaft
12 with a cross-shaped clamp seat, and the lower end of the cross-shaped rotating handle
8 is arranged in the cross-shaped clamp seat of the rotating shaft 12.
The negative pressure suction mechanism is connected with a hose 11 at the negative
pressure joint of the negative pressure suction machine 9, the end of the hose 11 is
connected with the outlet end of a filter, and the inlet end of the filter is connected with
the injection joint 3. A breathable leak-proof filter screen 2 is arranged in the filter.
When the utility model is in use, the preliminarily mixed pasty bone cement is poured
into the outer sleeve 1, and the stirrer is inserted with one end of the injection joint 3
facing upwards, then vacuum is extracted by the negative pressure suction machine 9, and
the lower end of the cross-shaped rotating handle 8 of the stirrer is inserted into the
rotating shaft 12 with the cross-shaped clamp seat, and the motor 10 is started to drive the
stirrer to rotate. After more than ten seconds, the bone cement is stirred evenly, and the
stirrer is pulled out, and the filter at the injection joint 3 is removed and inserted into the
ordinary injector push rod.

Claims (3)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS
1. A bone cement negative pressure stirring device, characterized by comprising a bone
cement mixing mechanism, a negative pressure suction mechanism and a power
mechanism. The bone cement mixing mechanism consists of an outer sleeve with an
injection joint at the top end and a stirrer arranged in the outer sleeve, wherein the stirrer
consists of a stirring blade, a stirring shaft, a rubber piston and a cross-shaped rotating
handle which are fixedly connected in sequence.
The power mechanism is characterized in that an output shaft of a motor is provided with
a rotating shaft with a cross-shaped clamp seat, and the lower end of the cross-shaped
rotating handle is arranged in the cross-shaped clamp seat of the rotating shaft.
The negative pressure suction mechanism is connected with a hose at the negative
pressure joint of the negative pressure suction machine, the tail end of the hose is
connected with the outlet end of a filter, and the inlet end of the filter is connected with
the injectionjoint. A breathable leak-proof filter screen is arranged in the filter.
2. The bone cement negative pressure stirring device according to claim 1, characterized
in that the stirring blade has a cross-shaped structure and is composed of a first stirring
blade and a second stirring blade, wherein the first stirring blade is composed of two
symmetrically arranged isosceles triangular sub-blades, the outer half of which is turned
up by 30-60 degrees, and the second stirring blade is composed of two symmetrically
arranged isosceles triangular sub-blades, the outer half of which is turned down by 30-60
degrees.
3. The bone cement negative pressure stirring device according to claim 2, wherein the
sub-blades of the first stirring blade are tilted backward by 0-15 degrees relative to the
rotation direction, and the sub-blades of the second stirring blade are tilted backward by
-15 degrees relative to the rotation direction.
FIGURES
1/3 2021101103
Fig. 1 is a schematic diagram of the overall structure of the utility model.
AU2021101103A 2021-03-02 2021-03-02 A bone cement negative pressure stirring device Active AU2021101103A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2021101103A AU2021101103A4 (en) 2021-03-02 2021-03-02 A bone cement negative pressure stirring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2021101103A AU2021101103A4 (en) 2021-03-02 2021-03-02 A bone cement negative pressure stirring device

Publications (1)

Publication Number Publication Date
AU2021101103A4 true AU2021101103A4 (en) 2021-06-03

Family

ID=76132790

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2021101103A Active AU2021101103A4 (en) 2021-03-02 2021-03-02 A bone cement negative pressure stirring device

Country Status (1)

Country Link
AU (1) AU2021101103A4 (en)

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