CN111671988A - Wound surface dressing change drainage device - Google Patents
Wound surface dressing change drainage device Download PDFInfo
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- CN111671988A CN111671988A CN202010680750.3A CN202010680750A CN111671988A CN 111671988 A CN111671988 A CN 111671988A CN 202010680750 A CN202010680750 A CN 202010680750A CN 111671988 A CN111671988 A CN 111671988A
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- layer
- liquid
- medicine
- dressing change
- negative pressure
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- 230000008859 change Effects 0.000 title claims abstract description 35
- 239000003814 drug Substances 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 238000010521 absorption reaction Methods 0.000 claims abstract description 27
- 229940079593 drug Drugs 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 238000012377 drug delivery Methods 0.000 claims abstract description 10
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 206010052428 Wound Diseases 0.000 description 53
- 208000027418 Wounds and injury Diseases 0.000 description 53
- 238000011010 flushing procedure Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 239000006261 foam material Substances 0.000 description 6
- 238000005213 imbibition Methods 0.000 description 5
- 210000001519 tissue Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000001338 necrotic effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000000416 exudates and transudate Anatomy 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000002674 ointment Substances 0.000 description 2
- 231100000915 pathological change Toxicity 0.000 description 2
- 230000036285 pathological change Effects 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 206010063560 Excessive granulation tissue Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 210000001126 granulation tissue Anatomy 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 230000008467 tissue growth Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000029663 wound healing Effects 0.000 description 1
Images
Classifications
-
- 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
- A61M1/96—Suction control thereof
- A61M1/962—Suction control thereof having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
-
- 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
- A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains
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)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Otolaryngology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- External Artificial Organs (AREA)
Abstract
The invention discloses a wound dressing change drainage device which sequentially comprises a medicine layer, an isolation layer, a liquid absorption layer and a closed fixing layer from the wound to the outside; the sealed fixing layer seals the medicine layer, the isolating layer and the liquid absorption layer and fixes the medicine layer, the isolating layer and the liquid absorption layer on the skin surface around the wound surface; the drug layer is made of imbibing expansion material, and one side of the drug layer close to the wound surface is provided with a drug delivery tube; the administration tube is led out of the closed fixed layer; the isolating layer is provided with a plurality of one-way valve pore canals; the liquid absorbing layer is made of liquid absorbing expansion materials and comprises a sealing layer, and the sealing layer seals the liquid absorbing layer except for the part attached to the isolating layer; and a negative pressure drainage tube is arranged in the liquid suction layer. The device integrates the functions of dressing change and drainage, and overcomes the defect that the dressing change cannot be carried out on the wound surface of negative pressure drainage. The medicine layer and the liquid absorption layer can be repeatedly cleaned and used without continuously connecting negative pressure for a long time, thereby relieving the burden of medical care personnel and patients.
Description
Technical Field
The invention belongs to the technical field of medical treatment, and particularly relates to a wound dressing change drainage device.
Background
Negative pressure wound treatment technology (vacuum healing drainage VSD) is a new technology developed in recent years for treating wounds. The skin or soft tissue of an organism is filled with the polyethylene alcohol hydrated foam to form a wound surface after being damaged, infected and necrotic, the wound surface is drained in all directions, the whole wound surface and cavities are covered and sealed by a biological semi-permeable membrane, a porous drainage tube is connected with a foam material and is connected with a negative pressure device, so that the wound surface is in a negative pressure sealing state, the wound surface seepage and liquefied necrotic tissues are promoted to be drained out of the body, and the efficient drainage is formed. The method can accelerate blood circulation of wound surface, promote new blood vessel to enter wound surface, stimulate granulation tissue growth, and accelerate wound healing.
However, existing VSDs are not capable of repeated wound dosing and dressing changes during treatment. Even if the medicine is administrated, the medicine is quickly sucked out by negative pressure to reduce the curative effect; the continuous negative pressure connection limits the movement of the patient, the size of the continuous negative pressure is not easy to master, and excessive exudation or bleeding is caused by excessive negative pressure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the wound dressing change drainage device, which can simultaneously carry out dressing change and wound drainage, improve the drainage effect, relieve the pain of repeated dressing change of patients and reduce the workload of medical staff.
The specific technical scheme is as follows:
a wound dressing change drainage device comprises a medicine layer, an isolation layer, a liquid absorption layer and a sealing and fixing layer from the wound to the outside in sequence; the sealed fixing layer seals the medicine layer, the isolating layer and the liquid absorption layer and fixes the medicine layer, the isolating layer and the liquid absorption layer on the skin surface around the wound surface;
the drug layer is made of imbibing swelling material, a drug delivery tube is arranged on one side of the drug layer close to the wound surface, and a plurality of drug delivery holes are formed in one side of the drug delivery tube facing the wound surface; the administration tube is led out of the closed fixed layer;
the isolating layer is made of flexible waterproof and air-proof material, and is provided with a plurality of one-way valve pore canals, so that liquid can only flow from the medicine layer to the liquid absorbing layer and cannot flow reversely;
the liquid absorbing layer is made of liquid absorbing expansion materials and comprises a sealing layer, and the sealing layer seals the liquid absorbing layer except for the part attached to the isolating layer; a negative pressure drainage tube is arranged in the liquid suction layer and is led out of the closed fixed layer; the sealing layer is impermeable to water and air.
When the device is used, after the wound surface is thoroughly debrided, the medicine layer of the dressing change drainage device is covered on the wound surface, and the closed fixing layer is fixed on the skin surface around the wound surface. The medicine layer gas is sucked out from the medicine feeding pipe, and a proper amount of ointment or liquid medicine is connected with the medicine feeding pipe through the injector to inject the medicine under the condition of negative pressure of the medicine layer, so that the medicine can completely cover the wound surface. At the moment, the swelling amount of the medicine layer is small, and only the part of the medicine in contact with the wound surface swells, so that the medicine is in full contact with the wound surface, and simultaneously, the medicine layer has the functions of siphoning and draining exuded liquid. After the medicine and the tissue fully act, the medicine can be diluted, the seepage liquid is gradually increased to reach a certain amount, the medicine layer fully expands, and the liquid naturally overflows from the one-way valve orifice of the isolation layer and is absorbed by the liquid absorption layer without flowing back. The isolation layer can slow down the premature absorption of the medicine by the upper liquid absorption layer, prolong the contact time between the medicine and the wound surface, and is favorable for increasing the effect of the medicine. The liquid absorption layer absorbs the wound surface seepage and stores the wound surface seepage, the wound surface seepage is sucked out through negative pressure after reaching a certain amount, and the function of the closed fixed layer is mainly to fix and close the device, so that the device is prevented from falling off and the seepage is prevented from leaking outwards.
The dressing change method is as follows. The first step is as follows: sucking out the exudates from the medicine layer and the liquid absorbing layer. The liquid in the medicine layer is sucked out by the negative pressure suction of the administration tube, the material of the medicine layer shrinks when the negative pressure suction is carried out, the pore passage of the isolation layer is closed, and the medicine changing layer is isolated from the liquid absorption layer. Then the seepage in the liquid absorbing layer is sucked out through a negative pressure drainage tube of the liquid absorbing layer, and then the negative pressure is relieved. The second step is that: cleaning the medicine layer and the liquid absorption layer. Injecting flushing liquid from the administration tube to repeatedly flush the drug-changing layer and necrotic tissue on the wound surface, sucking out the flushing liquid after flushing, and keeping the negative pressure of the drug layer to seal the pore passage of the isolation layer. Then injecting cleaning fluid into the liquid absorbing layer from the negative pressure drainage tube for repeated flushing, finally sucking out the flushing fluid, relieving the negative pressure to keep the natural state of the liquid absorbing layer, and sealing the opening of the negative pressure drainage tube. The third step: and injecting a proper amount of new medicine again through the outer opening of the administration tube, and sealing the outer opening of the administration tube to finish the medicine change.
The whole dressing change standard process is adopted, and if seepage is less, dressing change can be carried out on the dressing change layer independently; if the early stage of pathological changes has more seepage which is not suitable for administration, the negative pressure source can be connected to become a negative pressure drainage device, the conversion of the function is completed, and the function is changed into a negative pressure drainage function. The dressing change is carried out after the seepage is reduced, and the device does not need to be changed.
The device integrates the functions of dressing change and drainage, and the drainage can be performed without continuously connecting a negative pressure source device. When the imbibition layer is cleaned, because the liquid suction of the drug changing layer keeps the negative pressure, each one-way valve channel of the isolation layer is closed, when the liquid of the imbibition layer is sucked by the negative pressure of the rethread at the moment, the negative pressure is isolated by the isolation layer, and as long as the negative pressure of the imbibition layer is not lower than the negative pressure of the drug layer, the drug layer and the wound surface cannot be influenced.
The device of the invention can be designed into various shapes, such as arc, ring, glove and the like, so as to meet the requirements of wounds of different parts of human bodies.
Furthermore, the one-way valve channels are uniformly distributed on the isolation layer.
Furthermore, the one-way valve orifice comprises a flexible protruding channel facing the liquid absorbing layer, the protruding channel narrows in the direction facing the liquid absorbing layer, and the protruding end of the protruding channel is provided with a one-way valve structure.
The structure of the check valve is not limited to a specific structure as long as unidirectional flow can be achieved under the touch of the fluid.
Still further, the check valve structure can be a flat tube which is connected with a flexible material at an opening of a protruding end of the protruding channel, the flat tube is surrounded by two connected tube walls, and the two tube walls can be used as valve clacks; the inner walls of the two valve clacks are contacted with each other under the natural state. When the medicine layer expands to a certain degree, liquid overflows, flows into protruding passageway, owing to have the flexibility, two valve clacks of flat pipe are separated each other under the effect of liquid, and liquid infiltration imbibition layer.
Still further, the check valve structure may be such that a cross-shaped notch is formed at the protruding end of the protruding channel. When the medicine layer expands to a certain degree, liquid overflows, flows into protruding passageway, and under the effect of liquid, because protruding passageway is flexible, cross incision department takes place deformation and opens, and liquid infiltration imbibition layer.
Furthermore, the administration tube is net-shaped, and a tube network is formed on one side of the medicine layer close to the wound surface, so that uniform administration is facilitated.
Furthermore, the part of the negative pressure drainage tube in the liquid suction layer is a perforated tube, so that the negative pressure liquid suction efficiency can be improved.
Further, the medicine layer and the liquid absorbing layer are made of polyvinyl alcohol hydrated foam. The function of the present invention can be achieved using a common medical sponge.
Further, the closed fixed layer is a biological semipermeable membrane. The device may also be externally secured with a bandage or tape-like material.
Furthermore, the sealing layer is made of transparent materials, and the wound seepage situation can be observed conveniently.
The invention has the following beneficial effects:
1. the device integrates the functions of dressing change and drainage, and overcomes the defect that the dressing change cannot be carried out on the wound surface of negative pressure drainage. The medicine layer can prolong the contact time between the medicine and the wound surface, and can change the medicine repeatedly to increase the curative effect. The existence of the isolation layer can prevent the medicine layer from being influenced by the liquid absorption layer when the medicine layer is changed. The periphery of the liquid absorbing layer is closed, so that leakage of seepage liquid is prevented.
2. The medicine layer and the liquid absorption layer can be repeatedly cleaned and used without frequent replacement, thereby solving the defect of frequent dressing replacement, reducing the workload of dressing change and relieving the pain of patients.
3. If the early stage of pathological changes has more seepage which is not suitable for administration, the negative pressure source can be connected to become a negative pressure drainage device, the conversion of the function is completed, and the function is changed into a negative pressure drainage function. The dressing change is carried out after the seepage is reduced, and the device does not need to be changed.
4. By utilizing the natural absorption and seepage and storage functions of the foam material, the negative pressure source device does not need to be continuously connected for drainage, the movement of a patient is not limited, and the stored liquid can not flow back to the medicine layer to influence the medicine effect during the movement.
Drawings
Fig. 1 is a front view of an internal structure of embodiment 1 of the present invention;
FIG. 2 is a schematic sectional view of a check valve port according to example 1 of the present invention in a natural state;
FIG. 3 is a schematic sectional view of a liquid passing state of a port of the check valve in example 1 of the present invention;
FIG. 4 is a schematic top view of a portion of an isolation layer according to embodiment 2 of the present invention;
in the figure, 1, drug layer; 2. an isolation layer; 2-1, a one-way valve pore passage; 2-1-1, valve clack; 2-1-2, a cross-shaped cut; 3. a liquid absorption layer; 3-1, sealing layer; 4. sealing the fixed layer; 5. an administration tube; 6. negative pressure drainage tube 7, wound surface.
In fig. 3, the direction of the arrow is the liquid flow direction.
Detailed Description
The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
A wound dressing change drainage device is shown in figures 1-3 and comprises a medicine layer 1, an isolation layer 2, a liquid absorption layer 3 and a sealing and fixing layer 4 from a wound 7 to the outside in sequence; the closed fixing layer 4 is made of a biological semipermeable membrane material, and seals and fixes the medicine layer 1, the isolation layer 2 and the liquid absorption layer 3 on the skin surface around the wound surface;
the drug layer 1 is made of a polyvinyl alcohol hydration foam material, a reticular drug delivery tube 5 is arranged on one side close to the wound surface 7, and a plurality of drug delivery holes are formed in one side, facing the wound surface 7, of the drug delivery tube 5; the administration tube 5 is led out of the closed fixed layer 4;
the isolating layer 2 is made of flexible, waterproof and air-proof materials, and is provided with a plurality of one-way valve pore canals 2-1, so that liquid can only flow from the medicine layer 1 to the liquid absorbing layer 3; the one-way valve hole 2-1 comprises a flexible protruding channel facing the liquid absorbent layer 3, and the protruding channel narrows in the direction facing the liquid absorbent layer 3; the opening of the protruding end of the protruding channel is connected with a flat tube made of flexible materials, the flat tube is surrounded by two connected valve clacks 2-1-1, and the inner walls of the two valve clacks 2-1-1 are in contact with each other in a natural state;
the liquid absorbing layer 3 is made of a polyvinyl alcohol hydrated foam material and comprises a sealing layer 3-1, and the sealing layer 3-1 seals the liquid absorbing layer 3 on the isolating layer 2 except for the part attached to the isolating layer 2; the liquid absorption layer 3 is internally provided with a negative pressure drainage tube 6, the negative pressure drainage tube 6 is led out of the closed fixed layer 4, and the part of the negative pressure drainage tube 6 positioned in the liquid absorption layer 3 is a perforated tube.
When the device is used, after the wound surface is completely debrided, the medicine layer 1 of the dressing change drainage device is covered on the wound surface 7, and the closed fixing layer 4 is fixed on the skin surface around the wound surface 7. Sucking out the gas in the medicine layer 1 from the medicine feeding pipe 5, and connecting a proper amount of ointment or liquid medicine to the medicine feeding pipe 5 through an injector to inject the medicine under the condition of negative pressure of the medicine layer 1 so that the medicine can completely cover the wound surface 7. At this time, the swelling amount of the drug layer 1 is small, and only the part of the drug in contact with the wound surface swells, so that the drug is in full contact with the wound surface 7, and the drug layer simultaneously has the functions of siphoning and draining the exuded liquid. After the medicine and the tissue fully act, the medicine can be diluted, the seepage liquid is gradually increased, when a certain amount is reached, the foam material is fully expanded, the expansion force of the foam material and the liquid opens the one-way valve pore passage 2-1 of the isolation layer 2, the liquid naturally overflows from the valve pore passage 2-1 and is absorbed by the liquid absorption layer 3 without flowing back. The isolation layer 2 can slow down the premature absorption of the medicine by the liquid absorption layer 3 above, prolong the contact time between the medicine and the wound surface, and is favorable for increasing the effect of the medicine. The liquid absorption layer 3 absorbs the wound seepage and stores the wound seepage, the wound seepage is sucked out through negative pressure after reaching a certain amount, and the function of the closed fixed layer 4 is mainly to fix and close the device, so that the device is prevented from falling off and the seepage is prevented from leaking outwards.
The dressing change method is as follows. The first step is as follows: imbibe the drug layer 1 and the liquid imbibing layer 3 exudates. The liquid in the medicine layer 1 is sucked out by the negative pressure suction of the medicine feeding pipe 5, the material of the medicine layer 1 is contracted when the negative pressure suction is carried out, the pore passage of the isolating layer 2 is closed, and the medicine changing layer 1 is isolated from the liquid absorbing layer 3. Then the seepage in the liquid absorbing layer 3 is sucked out through the negative pressure drainage tube 6 of the liquid absorbing layer 3, and then the negative pressure is released. The second step is that: the drug layer 1 and the liquid absorbent layer 3 are washed. Injecting flushing fluid from the administration tube 5 to repeatedly flush necrotic tissues of the dressing layer 1 and the wound surface 7, sucking out the flushing fluid after flushing, and keeping the negative pressure of the medicament layer 1 to seal the pore passage of the isolation layer 2. Then, cleaning fluid is injected into the liquid absorbing layer 3 from the negative pressure drainage tube 6 for repeated flushing, finally, flushing fluid is sucked out, the negative pressure is relieved, the natural state of the liquid absorbing layer 3 is kept, and the opening of the negative pressure drainage tube 6 is closed. The third step: and injecting a proper amount of new medicine again through the outer opening of the medicine feeding tube 5, and sealing the outer opening of the medicine feeding tube 5 to finish the medicine changing.
Example 2
The difference from example 1 is that: the protruding end of the one-way valve pore passage 2-1 is provided with a cross-shaped notch 2-1-2 as shown in figure 4;
the remaining technical features are the same as those of example 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A wound dressing change drainage device is characterized by comprising a medicine layer (1), an isolation layer (2), a liquid absorption layer (3) and a closed fixing layer (4) from the wound to the outside in sequence; the sealed fixing layer (4) seals and fixes the medicine layer (1), the isolating layer (2) and the liquid absorbing layer (3) on the skin surface around the wound surface;
the drug layer (1) is made of imbibing swelling materials, a drug delivery tube (5) is arranged on one side of the drug layer close to the wound surface, and a plurality of drug delivery holes are formed in one side of the drug delivery tube (5) facing the wound surface; the administration tube (5) is led out of the closed fixed layer (4);
the isolating layer (2) is made of flexible, waterproof and air-proof materials, and is provided with a plurality of one-way valve pore canals (2-1) which can enable liquid to flow to the liquid absorbing layer (3) only from the medicine layer (1);
the liquid absorbing layer (3) is made of liquid absorbing expansion materials and comprises a sealing layer (3-1), and the sealing layer (3-1) seals the liquid absorbing layer (3) except for the part attached to the isolating layer (2); the liquid absorbing layer (3) is internally provided with a negative pressure drainage tube (6), and the negative pressure drainage tube (6) is communicated out of the closed fixed layer (4).
2. The wound dressing change drainage device according to claim 1, characterized in that the one-way valve channel (2-1) comprises a flexible protruding channel towards the liquid absorbent layer (3), the protruding channel narrows in the direction towards the liquid absorbent layer (3), and the protruding end of the protruding channel is provided with a one-way valve structure.
3. The wound dressing change drainage device of claim 2, wherein the one-way valve is structured as follows: the flat pipe is made of flexible materials and connected with an opening at the protruding end of the protruding channel, the flat pipe is surrounded by two connected valve clacks (2-1-1), and the inner walls of the two valve clacks (2-1-1) are in contact with each other.
4. The wound dressing change drainage device of claim 2, wherein the one-way valve is structured as follows: the protruding end of the protruding channel is provided with a cross-shaped notch (2-1-2).
5. A wound dressing change drainage device according to any one of claims 1-4, characterized in that the administration tube (5) is mesh-shaped.
6. A wound dressing change drainage device according to any one of claims 1-4, characterized in that the part of the negative pressure drainage tube (6) located in the liquid absorption layer (3) is a porous tube.
7. A wound dressing change drainage device according to any one of claims 1-4, characterized in that the material of said drug layer (2) and said liquid absorbent layer (3) is polyvinyl alcohol hydrated foam.
8. A wound dressing change drainage device according to any one of claims 1-4, characterized in that the closed fixing layer (4) is a bio-semipermeable membrane.
9. A wound dressing change drainage device according to any one of claims 1-4, characterized in that the sealing layer (3-1) is made of transparent material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010680750.3A CN111671988A (en) | 2020-07-15 | 2020-07-15 | Wound surface dressing change drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010680750.3A CN111671988A (en) | 2020-07-15 | 2020-07-15 | Wound surface dressing change drainage device |
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| Publication Number | Publication Date |
|---|---|
| CN111671988A true CN111671988A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010680750.3A Withdrawn CN111671988A (en) | 2020-07-15 | 2020-07-15 | Wound surface dressing change drainage device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111671988A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113397817A (en) * | 2021-07-16 | 2021-09-17 | 茂名市人民医院 | Negative pressure wound surface dressing |
-
2020
- 2020-07-15 CN CN202010680750.3A patent/CN111671988A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113397817A (en) * | 2021-07-16 | 2021-09-17 | 茂名市人民医院 | Negative pressure wound surface dressing |
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Application publication date: 20200918 |
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