CN-121971720-A - Negative pressure suction system for diabetic foot wound

CN121971720ACN 121971720 ACN121971720 ACN 121971720ACN-121971720-A

Abstract

A negative pressure suction system for a diabetic foot wound is provided with an infusion device which is used for conveying injection for cleaning to the wound and can regulate speed, a drainage device which is used for draining liquid and a negative pressure device which is used for generating negative pressure, wherein the negative pressure device is communicated with the drainage device, a liquid outlet end of the infusion device is arranged on the lower surface of a suction cover of the drainage device, and a liquid outlet hole of the liquid outlet end is far away from the suction cover. The system has the beneficial effects that firstly, by controlling the infusion speed of the infusion device and matching with suction, the biological film and bacteria tightly adhered to the wound bed can be physically washed and loosened, bacteria, toxins and inflammatory medium in the wound can be continuously removed, and a cleaner healing environment is created. And secondly, the injection is synchronously released from a liquid outlet hole at the liquid outlet end to form umbrella-shaped or dispersive perfusion to cover a larger wound area, so that the flushing liquid can more comprehensively loosen and take away necrotic tissue fragments, bacterial metabolites and inflammatory mediums, dead angles are not remained, and local pressure and potential tissue damage are reduced.

Inventors

LUO XIANGRONG
MENG MIN
LI JINGXIANG
CAO YING
HUANG YAN
SUN XIAOLAN
LI JIMIN
LIU Suting
ZOU MENGCHEN
MENG JIANFU
JIANG YA
XIE CUIHUA
LUO YULING

Assignees

南方医科大学南方医院

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (10)

1. The negative pressure suction system for the diabetic foot wound is characterized by being provided with an infusion device which is used for conveying cleaning injection to the wound and can regulate speed, a drainage device which is used for draining liquid and a negative pressure device which is used for generating negative pressure, wherein the negative pressure device is communicated with the drainage device; the liquid outlet end of the infusion device is arranged on the lower surface of the suction cover of the drainage device, and the liquid outlet hole of the liquid outlet end is far away from the suction cover.
2. The negative pressure suction system for a diabetic foot wound according to claim 1 wherein the infusion device is provided with a liquid storage part for storing the injection liquid for cleaning, a flow rate control part and a conduit, one end of the conduit is communicated with the liquid storage part, the other end of the conduit is used as the liquid outlet end, and the flow rate control part is sleeved on the outer surface of the conduit.
3. The negative pressure suction system for diabetic foot wounds according to claim 2, wherein the end of the liquid outlet end is a closed end, and a plurality of liquid outlets are arranged on the side wall of the liquid outlet end, and the liquid outlets are all positioned on the lower surface of the suction hood.
4. The negative pressure suction system for diabetic foot wound according to any one of claims 1 to 3 wherein the cleansing injection is physiological saline with a mass concentration of 0.9%.
5. The negative pressure suction system for diabetic foot wound according to claim 4 wherein the flow rate of the cleansing injection is 15 drops/min to 20 drops/min.
6. The negative pressure suction system for a diabetic foot wound according to claim 3, wherein the suction hood is provided with a hood body and a dressing film for fixing the hood body on the periphery of the wound, the dressing film is fixedly connected with the edge of the hood body, a yielding hole is formed in the middle of the dressing film, the hood body penetrates through the yielding hole, the liquid outlet end is positioned on the lower surface of the dressing film, and the liquid outlet is positioned right below the yielding hole; the dressing film is formed by compounding a porous polyurethane foam layer and a polyvinyl alcohol layer containing growth factors.
7. The negative pressure suction system for diabetic foot wound of claim 6, wherein the aperture of the liquid outlet is 1.0 mm-1.5 mm; the maximum distance between the liquid outlet and the adjacent liquid outlet is 30 mm-50 mm.
8. The negative pressure suction system for a diabetic foot wound of claim 7 wherein the liquid outlet end is a circular liquid outlet end; dividing the circular liquid outlet end into two half pipes through a central axis datum pair penetrating through the circular liquid outlet end, defining one half pipe close to the cover body as an upper half pipe, and defining one half pipe close to a wound as a lower half pipe; the liquid outlet is positioned in the lower half pipe; Or alternatively The liquid outlets are distributed in the upper half pipe and the lower half pipe.
9. The negative pressure suction system for a diabetic foot wound of claim 8 wherein the smaller the aperture of the liquid outlet is the closer to the reference surface.
10. The negative pressure suction system for diabetic foot wound according to any one of claims 1 to 3 wherein the material of the catheter is polylactic acid, polycaprolactone, polylactic acid-glycolic acid copolymer or lactide-caprolactone copolymer.

Description

Negative pressure suction system for diabetic foot wound Technical Field The invention relates to the technical field of medical equipment, in particular to a negative pressure suction system for a diabetic foot wound. Background Diabetic foot ulcers are one of the most common chronic complications of diabetes, particularly lower limb distal neuropathy and vascular lesions (such as ischemia) caused by diabetes, or the difficult-to-heal wound surface formed after foot skin and subcutaneous tissue are damaged due to the synergistic effect of the two, and are the main causes of foot disability and amputation of diabetic patients. The negative pressure suction can effectively discharge purulent secretion, necrotic tissue scraps and bacteria of the ulcer wound surface through continuous or intermittent negative pressure suction, and reduce the culture medium for bacteria breeding. Meanwhile, the mechanical traction effect generated by negative pressure can stimulate the blood vessel expansion around the wound surface, improve local blood circulation, provide sufficient oxygen and nutrition for granulation tissue proliferation and capillary angiogenesis, solve the problem of healing stagnation caused by insufficient blood supply, and also can accelerate local lymphatic reflux, lighten wound surface edema and relieve pain. At present, a part of chronic ulcer wound surface negative pressure suction devices are known, for example, a negative pressure drainage shoe and a negative pressure drainage device with the same disclosed in Chinese patent publication No. CN215308773U are disclosed, and the device can be applied to negative pressure suction of diabetes wounds, but can only realize a simple suction function, cannot effectively control wound surface infection, and is difficult to meet clinical treatment requirements. Therefore, in order to solve the deficiencies of the prior art, it is necessary to provide a negative pressure suction system for diabetic foot wounds. Disclosure of Invention The invention aims to avoid the defects of the prior art and provides a negative pressure suction system for a diabetic foot wound. The negative pressure suction system for the diabetic foot wound continuously removes bacteria, toxins and inflammatory mediators in the wound by physically flushing and loosening biological films and bacteria tightly adhered to a wound bed while sucking the negative pressure suction system for the diabetic foot wound, thereby creating a clean environment for wound healing. The above object of the present invention is achieved by the following technical measures: The negative pressure suction system for the diabetic foot wound is provided with an infusion device which is used for conveying injection liquid for cleaning to the wound and can regulate speed, a drainage device which is used for draining liquid and a negative pressure device which is used for generating negative pressure, wherein the negative pressure device is communicated with the drainage device. The liquid outlet end of the infusion device is arranged on the lower surface of the suction cover of the drainage device, and the liquid outlet hole of the liquid outlet end is far away from the suction cover. Preferably, the infusion device is provided with a liquid storage part for storing the injection for cleaning, a flow rate control part and a catheter, one end of the catheter is communicated with the liquid storage part, the other end of the catheter is used as the liquid outlet end, and the flow rate control part is sleeved on the outer surface of the catheter. Preferably, the end of the liquid outlet end is a closed end, and the side wall of the liquid outlet end is provided with a plurality of liquid outlets, and the liquid outlets are all positioned on the lower surface of the suction hood. Preferably, the above-mentioned injection for cleaning is physiological saline with a mass concentration of 0.9%. Preferably, the flow rate of the injection for cleaning is 15 drops/min to 20 drops/min. Preferably, the suction cover is provided with a cover body and a dressing film for fixing the cover body to the periphery of a wound, the dressing film is fixedly connected with the edge of the cover body, a yielding hole is formed in the middle of the dressing film, the cover body penetrates through the yielding hole, the liquid outlet end is located on the lower surface of the dressing film, and the liquid outlet is located right below the yielding hole. Preferably, the dressing is formed by compounding a porous polyurethane foam layer and a polyvinyl alcohol layer containing a growth factor. Preferably, the aperture of the liquid outlet is 1.0 mm-1.5 mm; Preferably, the maximum distance between the liquid outlet and the adjacent liquid outlet is 30 mm-50 mm. Preferably, the liquid outlet end is a circular liquid outlet end. The circular liquid outlet end is divided into two half pipes through a central axis datum pair penetrating through th