CN105833363A - Mechanical negative pressure device and negative pressure generating method thereof - Google Patents
Mechanical negative pressure device and negative pressure generating method thereof Download PDFInfo
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- CN105833363A CN105833363A CN201610155314.8A CN201610155314A CN105833363A CN 105833363 A CN105833363 A CN 105833363A CN 201610155314 A CN201610155314 A CN 201610155314A CN 105833363 A CN105833363 A CN 105833363A
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- negative pressure
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- elastomeric element
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000012530 fluid Substances 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 5
- 230000005489 elastic deformation Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 210000000416 exudates and transudate Anatomy 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 206010052428 Wound Diseases 0.000 description 27
- 208000027418 Wounds and injury Diseases 0.000 description 27
- 238000009581 negative-pressure wound therapy Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 210000003722 extracellular fluid Anatomy 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 102000004506 Blood Proteins Human genes 0.000 description 1
- 108010017384 Blood Proteins Proteins 0.000 description 1
- 206010021138 Hypovolaemic shock Diseases 0.000 description 1
- 108090000723 Insulin-Like Growth Factor I Proteins 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 102000013275 Somatomedins Human genes 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 206010040560 shock Diseases 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/80—Suction pumps
- A61M1/81—Piston pumps, e.g. syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/05—Bandages or dressings; Absorbent pads specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Vascular Medicine (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Actuator (AREA)
Abstract
The embodiment of the invention provides a negative pressure generating method of a mechanical negative pressure device. The negative pressure generating method is characterized by comprising the following steps: fixing a piston which is positioned in a cavity of the mechanical negative pressure device and connected with an elastic part to a second position; and moving the piston to a first position from a second position by using the elastic part, wherein during the moving process, the piston generates the negative pressure used for sucking wound exudate at the position of a wound dressing. With the adoption of the embodiment of the invention, the negative pressure generating method of the mechanical negative pressure device and the mechanical negative pressure device have the beneficial effects that the operation is simple, a negative pressure hole and an air exhaust hole share the same pipeline, and the elastic deformation of the elastic part generates the negative pressure used for sucking the wound exudate, so that a processing technology of the mechanical negative pressure device is simple, and the production cost is low.
Description
Technical field
The present invention relates to field of medical device, particularly relate to a kind of mechanical type negative pressure equipment and produce method and the mechanical type negative pressure equipment of negative pressure.
Background technology
Negative pressure wound therapy (Negative Pressure Wound Therapy, NPWT) is the advanced trauma care mode that development in recent years is got up.It mainly by applying relatively low negative pressure (general-55mmHg to 175mmHg) to wound, promotes the healing of wound surface.Specifically, vacuum suction acts on cell membrane, can be allowed to expand, distort, cell is taken as damage, and the information of conduction impairment, to nucleus, is changed by signal, heal before causing emiocytosis somatomedin, including the vascular proliferation factor, thus stimulates tissue to produce more new vessels；It addition, vacuum suction siphons away transudate from wound surface, help to set up wound bed fluid balance；And one moistening environment of offer is provided, removes slough, reduce the bacterial number (because antibacterial is difficult to survival under negative pressure) of wound surface, alleviate the effect of edema (i.e. extracellular fluid/intercellular fluid)；Secondly, when captivation acts on dressing, air is sucked away, and dressing acts on wound surface uniformly with regard to collapses down compressing, and this pressure can resist the excess of the wound surface caused and ooze out.Therefore negative pressure wound therapy technology can be used for Patients with Big Area Burn, can avoid patient being made to lose too much plasma protein owing to substantial amounts of wound surface oozes out by this technology, reduce its probability that hypovolemic shock occurs.Showing according to U.S.'s clinic over nearly 10 years, negative pressure wound therapy has good healing effect to the treatment of wounds of various acute and chronics.
At present, negative pressure equipment mostly is battery powered pump to provide negative pressure.But, the cost intensive of these pumps, and need to safeguard the electric power that charging guarantees battery.But due to present battery technology and the prescription of negative pressure equipment so that the treatment time of Electric negative pressure equipment can not get ensureing, and for the place of a lot of charging inconvenience, such as field or disaster relief, this Electric negative pressure equipment cannot be applied.So in this case, need to use mechanical type negative pressure equipment.In prior art, the compress mode of mechanical type negative pressure equipment does not generally comply with ergonomic designs, uses laborious so that negative pressure source provide negative pressure can not held stationary and persistently, be unfavorable for treatment.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, it is provided that a kind of mechanical type negative pressure equipment produces the method for negative pressure, it is characterised in that described method comprises the steps:
The piston being connected with elastomeric element in the cavity of described mechanical type negative pressure equipment is fixed on the second position；
Described piston is moved to primary importance by described elastomeric element from the described second position；
Described piston produces the negative pressure of wound fluid at suction wound dressing in moving process.
Further, the piston being connected with elastomeric element in described mechanical type negative pressure equipment is fixed on the second position to include:
Promote described piston, make the elastomeric element deformation being connected with described piston；
In described elastomeric element deformation to when making described piston be in the second position, open and be arranged at the plunger lock switch that described cavity is external, lock described piston so that it is be fixed on the second position.
Further, described piston is moved from the described second position and also includes to primary importance by described elastomeric element:
Close described plunger lock switch, described piston is unlocked from the described second position.
Correspondingly, the embodiment of the present invention also provides for a kind of mechanical type negative pressure equipment, and including the cavity of mechanical type negative pressure equipment, described mechanical type negative pressure equipment also includes:
Push rod and be arranged at described push rod one end and be positioned at the piston of described cavity, described push rod is for pushing to the second position by described piston；
The plunger lock switch being arranged on outside cavity, for being fixed on the described second position by described piston；
The elastomeric element being connected with described piston, for moving described piston to primary importance from the described second position, so that described piston produces the negative pressure of wound fluid at suction wound dressing in moving process.
Further, described plunger lock switch is for being arranged on the pipe valve at the conveying pipe of described cavity bottom.
Further, described plunger lock switchs as to be arranged on the draw-in groove on described cavity wall, and described piston is provided with and the fixture block of described card slot fit.
Further, described elastomeric element one end is connected with described cavity, and the other end is connected with the upper end of described piston；
Or, described elastomeric element one end is connected with described cavity, and the other end is connected through the upper end of described piston with described cavity.
Further, described elastomeric element is connected to the arbitrary sidewall outside described cavity by the first rotary shaft being arranged on described cavity top end.
Further, described elastomeric element and the connected mode of described piston and described cavity are that bonding, welding, screw tightening, bolt are fixed, be socketed or buckle connection.
Further, described elastomeric element is spring, rubber tube, rubber band or elastic threads.
Implement the embodiment of the present invention, have the advantages that the mechanical type negative pressure equipment that embodiments of the invention provide produces the method for negative pressure and mechanical type negative pressure equipment is simple to operate, negative pressure mouth and air vent share same pipeline, the elastic deformation using elastomeric element produces negative pressure-pumping wound fluid so that the processing technique of mechanical type negative pressure equipment is simpler, production cost is lower.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, the accompanying drawing obtaining other according to these accompanying drawings still falls within scope of the invention.
Fig. 1 is the structural representation one of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 2 is the structural representation two of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 3 is the structural representation three of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 4 is the structural representation four of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 5 is the structural representation five of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 6 is the structural representation six of a kind of mechanical type negative pressure equipment that the present invention provides.
Fig. 7 is the flow chart that a kind of mechanical type negative pressure equipment that the present invention provides produces the first embodiment of the method for negative pressure.
Fig. 8 is the flow chart that a kind of mechanical type negative pressure equipment that the present invention provides produces the second embodiment of the method for negative pressure.
Detailed description of the invention
The explanation of following embodiment is with reference to accompanying drawing, can be in order to the specific embodiment implemented in order to the formula example present invention.The direction term that the present invention is previously mentioned, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side " etc., be only the direction with reference to annexed drawings.Therefore, the direction term of use is to illustrate and understand the present invention, and is not used to limit the present invention.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
As it is shown in figure 1, Fig. 1 shows the structural representation one of a kind of mechanical type negative pressure equipment that the present invention provides, this mechanical type negative pressure equipment 100 includes: the cavity 110 of mechanical type negative pressure equipment；Push rod 121 and be arranged at described push rod 121 one end and be positioned at the piston 120 of described cavity 110, described push rod 121 is for pushing to the second position by described piston 120；The plunger lock switch 140 being arranged on outside cavity 110, for being fixed on the described second position by described piston 120；The elastomeric element 130 being connected with described piston 120, for moving described piston 120 to primary importance from the described second position, so that described piston 120 produces the negative pressure of wound fluid at suction wound dressing in moving process.
In the present embodiment, cavity 110 is the structure of a syringe-like, and the top of cavity 110 is provided with a through hole 111, and this through hole 111 can allow the push rod 121 promoting piston 120 to pass through.Piston 120 arranges in the cavity 110 of syringe-like, push rod 121 promotes piston 120 to move along the axial direction of cavity 110 in cavity 110 through described through hole 111, concrete, the top of cavity 110 move to bottom, further, primary importance move to the second position.In preferred embodiment, primary importance is positioned at cavity 100 and places through hole 111 position of push rod 121 close to cavity 100, and the second position is in the one end near conveying pipe.Observing for convenience, cavity 110 can be provided with partially transparent region, or the entirety of cavity 110 is all made of clear material.It addition, the volume of the cavity 110 of syringe-like mechanical type negative pressure equipment in the present embodiment is 80-150ml, it is preferred that for 125ml.
Wherein, piston 120 is movably disposed in cavity 110, and gas does not allow from one end of cavity 110 through piston 120 to the other end of cavity 110.The bottom of piston 120 is to have elastic and sealing material to make, and such as flexible polymer can make piston 120 move in cavity 110 and keep the gas-tight seal between cavity 110 sidewall.Wherein, push rod 121 is one-body molded with piston 120；Or, push rod 121 can be directly connected to piston 120；Or, push rod 121 is not directly connected to piston 120." being directly connected to " herein can be that welding, screw tightening, gluing, bolt are fixed or dismountable mode such as hasp connects；" not being directly connected to " herein refers to that push rod 121 and piston 120 are two independent parts, one end of push rod 121 and the tip contact of piston 120, is used for piston 120 is pushed to the second position.It should be noted that, above-mentioned primary importance and the second position are indefiniteness position, primary importance and the second position can be all any position in described cavity 110, needs according to negative pressure treatment select the second position and the distance of primary importance distance cavity 110 bottom, but, described primary importance distance cavity 110 top is near, and described second position distance cavity 110 top is remote.In preferred embodiment, primary importance is probably positioned at cavity 100 and places the aperture position of push rod 121 close to cavity 100, and the second position is in the one end near conveying pipe 150.That is, moving to the second position from piston 120 from primary importance is to move to bottom from the top of cavity 110.
Seeing the structural representation two of a kind of mechanical type negative pressure equipment that Fig. 2 to Fig. 6, Fig. 2 show that the present invention provides, mechanical type negative pressure equipment 100 also includes the plunger lock switch 140 being arranged on outside cavity 110, for described piston 120 is fixed on the described second position.In the present embodiment, being additionally provided with the conveying pipe 150 flowing in cavity 110 for wound fluid in the bottom of cavity 110, be additionally provided with one for opening and closing the pipe valve 140a of conveying pipe 150 on conveying pipe 150, this pipe valve is described plunger lock switch 140.Described pipe valve, for when piston 120 is positioned at the second position, is closed conveying pipe 150 and is sealed so that piston 120 to be formed air lock.
In other examples, plunger lock switch 140 is the draw-in groove 140b being arranged on described cavity 110 sidewall, is provided with and the fixture block 123 of described card slot fit on described piston 120.It is understood that the structure that the inwall that draw-in groove 140b is cavity 110 highlights laterally, and piston 120 is fixed on the described second position for coordinating with the fixture block 123 of piston 120 on the sidewall of the latter half being arranged on cavity 110.Preferably, the quantity of draw-in groove 140b is multiple, on the sidewall being arranged on cavity 110 at interval.Further, draw-in groove 140b is set to facilitate pressing structure, such as, and flexible structure.
Elastomeric element 130 connects piston 120 and cavity 110, for being moved to primary importance from the described second position by described piston 120, so that described piston 120 produces the negative pressure of wound fluid at suction wound dressing in moving process.Concrete, the power that piston 120 moves to primary importance from the described second position is come from its resilience force after producing elastic deformation that is stretched by elastomeric element 130.When piston 120 is in the second position, described elastomeric element 130 is in and is stretched and elastically-deformable state；When piston 120 is in primary importance, described elastomeric element 130 is in original unstrained state.
In the present embodiment, elastomeric element 130 one end is connected with described cavity 110, and the other end is connected with the upper end of described piston 120.In other examples, elastomeric element 130 one end is connected with described cavity 110, and the other end is connected through the upper end of described piston 120 with described cavity 110.The end of elastomeric element 130 can be arranged on arbitrary sidewall of described cavity 110, and " arbitrary sidewall " herein includes the internal side wall of cavity, roof, diapire, exterior wall, outside diapire.Preferably, the end of elastomeric element 130 is connected to the top wall of cavity 110.Elastomeric element 130 and the connected mode of described piston 120 and described cavity 110 can be the combination that one or more modes in connection were fixed, and be socketed or buckled to bonding, welding, screw tightening, bolt.Described elastomeric element 130 can be one or more the combination that spring, rubber tube, rubber band or elastic threads etc. have the parts of coefficient of elasticity, and the quantity of elastomeric element 130 is also one or more.
As Fig. 3 is to shown in 6, and Fig. 3 shows the mechanical type negative pressure equipment structural representation three that the present invention provides.In this enforcement, the base wall outside elastomeric element 130 one end and described cavity 110, the other end is connected through the top of described cavity 110 with described piston 120 upper end.Preferably, the upper end of described cavity 110 can be provided with the first rotary shaft 112, and elastomeric element 130 is walked around the first rotary shaft 112 of cavity 110 upper end and is connected to piston 120 upper end.In other examples, elastomeric element 130 one end is arranged at the bottom of the side of described cavity 110, and the other end is fixed on the bottom of the opposite side of described cavity 110 through described piston 120.In other examples, the top of described cavity 110 is provided with the first rotary shaft 112, described piston 120 is provided with the second rotary shaft 122, elastomeric element 130 one end is arranged at the bottom of the side of described cavity 110, and the first rotary shaft 112 of first rotary shaft the 112, second rotary shaft 122 and cavity 110 top opposite side that the other end passes sequentially through cavity 110 top side is fixed on the bottom of described cavity 110 opposite side.
Additionally, described mechanical type negative pressure equipment 100 also includes arranging and outside described cavity 110 for protecting the outer housing 160 of described elastomeric element 130.In the present embodiment, described outer housing 160 uses the material identical with described cavity 110 and cavity 110 ultrasonic bonding, it is to be appreciated that described outer housing 160 can also be with described cavity 110 integrator or one-body molded with described cavity 110 by the way of bonding.
Implement the embodiment of the present invention, have the advantages that the mechanical type negative pressure equipment of embodiments of the invention produces method and the easily operated use of mechanical type negative pressure equipment of negative pressure, negative pressure mouth and air vent share same pipeline, the elastic deformation using elastomeric element produces negative pressure-pumping wound fluid so that the processing technique of mechanical type negative pressure equipment is simpler, production cost is lower.
As it is shown in fig. 7, Fig. 7 shows that a kind of mechanical type negative pressure equipment that the present invention provides produces the flow chart one of the method for negative pressure, concrete, this mechanical type negative pressure equipment produces the method for negative pressure and comprises the steps:
Step S10, is fixed on the second position by the piston 120 being connected with elastomeric element 130 in the cavity 110 of described mechanical type negative pressure equipment 100.In above-mentioned steps, mechanical type negative pressure equipment 100 includes the plunger lock switch 140 being arranged on outside cavity 110, for described piston 120 is fixed on the described second position.Said second position is indefiniteness position, can be any position in described cavity 110, selectes the distance of second position distance cavity 110 bottom according to the needs of negative pressure treatment.In the present embodiment, the second position is the bottom of cavity 110.In preferred embodiment, the second position is in the one end near conveying pipe.
In preferred embodiment, step S10 farther includes:
Step S11, promotes described piston 120, makes elastomeric element 130 deformation being connected with described piston 120.In this step, one end of piston 120 connects a push rod 121, and described push rod 121 is for pushing to the second position by described piston 120, so that elastomeric element 130 deformation being connected with piston 120.Wherein, push rod 121 with the connected mode of piston 120 can be: push rod 121 is one-body molded with piston 120；Or, push rod 121 can be directly connected to piston 120；Or, push rod 121 is not directly connected to piston 120." being directly connected to " herein can be that welding, screw tightening, gluing, bolt are fixed or dismountable mode such as hasp connects；" not being directly connected to " herein refers to that push rod 121 and piston 120 are two independent parts, one end of push rod 121 and the tip contact of piston 120, is used for promoting described piston 120, makes elastomeric element 130 deformation being connected with described piston 120.
Step S12, in the deformation of described elastomeric element 130 to when making described piston 120 be in the second position, opens and is arranged at the plunger lock switch 140 that described cavity 110 is external, lock described piston 120 so that it is be fixed on the second position.In above-mentioned steps, in the present embodiment, plunger lock switch 140 is the pipe valve at the conveying pipe 150 of the bottom being arranged on cavity 110, when piston 120 is positioned at the second position, closes conveying pipe 150 and seals so that piston 120 to be formed air lock.In other examples, plunger lock switch 140 is the draw-in groove 140b being arranged on cavity 110 sidewall, and draw-in groove 140b is the structure that the inwall of cavity 110 highlights laterally, and coordinates with the fixture block 123 of piston 120 piston 120 is fixed on the described second position.Preferably, the quantity of draw-in groove 140b is multiple, on the sidewall being arranged on cavity 110 at interval.Further, draw-in groove 140b is set to facilitate pressing structure, such as, and flexible structure.
Step S20, described piston 120 is moved to primary importance by described elastomeric element 130 from the described second position.Concrete, the power that piston 120 moves to primary importance from the described second position is come from its resilience force after producing elastic deformation that is stretched by elastomeric element 130.When piston 120 is in the second position, described elastomeric element 130 is in and is stretched and elastically-deformable state；When piston 120 is in primary importance, described elastomeric element 130 is in original unstrained state.
In preferred embodiment, also included before step S20:
Step S13, closes described plunger lock switch 140, is unlocked from the described second position by described piston 120.In above-mentioned steps, when needs are treated, closing described plunger lock switch 140, due to elastic deformation, resilience drives piston 120 to move from the second position to elastomeric element 130, and produces the negative pressure of wound fluid at suction wound dressing.
Step S30, described piston 120 produces the negative pressure of wound fluid at suction wound dressing in moving process.Elastomeric element 130 connects piston 120 and cavity 110, for being moved to primary importance from the described second position by described piston 120, so that described piston 120 produces the negative pressure of wound fluid at suction wound dressing in moving process.
Implement the embodiment of the present invention, have the advantages that the mechanical type negative pressure equipment of embodiments of the invention produces method and the easily operated use of mechanical type negative pressure equipment of negative pressure, negative pressure mouth and air vent share same pipeline, the elastic deformation using elastomeric element produces negative pressure-pumping wound fluid so that the processing technique of mechanical type negative pressure equipment is simpler, production cost is lower.
Above disclosed it is only one preferred embodiment of the present invention, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to the claims in the present invention with this, still belong to the scope that the present invention is contained.
Claims (10)
1. the method that a mechanical type negative pressure equipment produces negative pressure, it is characterised in that described method comprises the steps:
The piston being connected with elastomeric element in the cavity of described mechanical type negative pressure equipment is fixed on the second position；
Described piston is moved to primary importance by described elastomeric element from the described second position；
Described piston produces the negative pressure of wound fluid at suction wound dressing in moving process.
2. the method that mechanical type negative pressure equipment as claimed in claim 1 produces negative pressure, it is characterised in that the piston being connected with elastomeric element in described mechanical type negative pressure equipment is fixed on the second position and includes:
Promote described piston, make the elastomeric element deformation being connected with described piston；
In described elastomeric element deformation to when making described piston be in the second position, open and be arranged at the plunger lock switch that described cavity is external, lock described piston so that it is be fixed on the second position.
3. the method that mechanical type negative pressure equipment as claimed in claim 2 produces negative pressure, it is characterised in that described piston is moved from the described second position and also includes to primary importance by described elastomeric element:
Close described plunger lock switch, described piston is unlocked from the described second position.
4. a mechanical type negative pressure equipment, including the cavity of mechanical type negative pressure equipment, it is characterised in that described mechanical type negative pressure equipment also includes:
Push rod and be arranged at described push rod one end and be positioned at the piston of described cavity, described push rod is for pushing to the second position by described piston；
The plunger lock switch being arranged on outside cavity, for being fixed on the described second position by described piston；
The elastomeric element being connected with described piston, for moving described piston to primary importance from the described second position, so that described piston produces the negative pressure of wound fluid at suction wound dressing in moving process.
5. mechanical type negative pressure equipment as claimed in claim 4, it is characterised in that described plunger lock switch is for being arranged on the pipe valve at the conveying pipe of described cavity bottom.
6. mechanical type negative pressure equipment as claimed in claim 4, it is characterised in that described plunger lock switchs as to be arranged on the draw-in groove on described cavity wall, and described piston is provided with and the fixture block of described card slot fit.
7. mechanical type negative pressure equipment as claimed in claim 4, it is characterised in that described elastomeric element one end is connected with described cavity, and the other end is connected with the upper end of described piston；
Or, described elastomeric element one end is connected with described cavity, and the other end is connected through the upper end of described piston with described cavity.
8. mechanical type negative pressure equipment as claimed in claim 7, it is characterised in that described elastomeric element is connected to the arbitrary sidewall outside described cavity by the first rotary shaft being arranged on described cavity top end.
9. the mechanical type negative pressure equipment as described in any one of claim 4 to 8, it is characterised in that described elastomeric element and the connected mode of described piston and described cavity are that bonding, welding, screw tightening, bolt are fixed, be socketed or buckle connection.
10. mechanical type negative pressure equipment as claimed in claim 9, it is characterised in that described elastomeric element is spring, rubber tube, rubber band or elastic threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155314.8A CN105833363A (en) | 2016-03-18 | 2016-03-18 | Mechanical negative pressure device and negative pressure generating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610155314.8A CN105833363A (en) | 2016-03-18 | 2016-03-18 | Mechanical negative pressure device and negative pressure generating method thereof |
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| CN105833363A true CN105833363A (en) | 2016-08-10 |
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| CN201610155314.8A Pending CN105833363A (en) | 2016-03-18 | 2016-03-18 | Mechanical negative pressure device and negative pressure generating method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108310479A (en) * | 2018-02-07 | 2018-07-24 | 苏州元禾医疗器械有限公司 | A kind of small-sized machine formula negative pressure equipment |
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Application publication date: 20160810 |