A cannula drainage device based on a digestive tract fistula

Abstract

The utility model discloses a kind of cannula drainage devices based on digestive tract fistula, it is related to medical instrument technical field, including outer sleeve and inner tube, several small holes are arranged in outer sleeve one end, inner tube is placed in outer sleeve, the end of inner tube is shorter than outer sleeve by entering small hole, the end of inner tube is worn out outer sleeve inner wall away from small hole, the end of inner tube is set negative pressure suction device away from small hole, outer sleeve away from small hole one end connects external environment or drip physiological saline.The utility model is spaced between outer sleeve and inner tube, air can enter freely, leaked intestinal juice pancreatic juice bile can enter the gap between outer sleeve and inner tube through the small hole of outer sleeve front end, then is sucked out through inner tube, inner tube with negative pressure does not contact with tissue organ, and tissue damage does not occur, and drainage effect is good, physiological saline automatically cleans the gap between outer sleeve and inner tube, not easy to block, drainage is sufficient, alleviate the pain of patient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a cannula drainage device based on a digestive tract fistula. Background Technology

[0002] Gastrointestinal fistula is a serious complication following various abdominal surgeries or traumas. The most common causes of gastrointestinal fistulas are surgical or traumatic. The main pathophysiological changes following the development of a gastrointestinal fistula are:

[0003] 1) Infection: Intestinal bacteria migrate outward and cause exogenous contamination. Bile and pancreatic juice cause tissue corrosion, leading to severe contamination and infection, which in turn leads to systemic infection and multiple organ dysfunction.

[0004] 2) The loss of water and electrolytes leads to homeostasis imbalance, insufficient circulation, nutrient loss and inability to be replenished through the gastrointestinal tract, resulting in malnutrition and consequently causing organ immune and metabolic disorders.

[0005] Prior to the 1970s, the treatment of gastrointestinal fistulas required rapid closure, often involving emergency or semi-emergency surgery, resulting in a very high failure rate of approximately 60%-80%. In the late 1970s, treatment strategies for gastrointestinal fistulas changed significantly, adopting non-surgical treatments, adequate drainage, and enteral and parenteral nutrition to encourage spontaneous healing. Deterministic surgery became a last resort. The systemic pathophysiological changes associated with gastrointestinal fistulas are significant, but the cause is the leakage of intestinal fluid, pancreatic juice, and bile from the fistula opening. The leakage of bile and pancreatic juice leads to infection, and electrolyte loss causes homeostasis imbalance. Therefore, local management of the fistula opening becomes crucial in the treatment of gastrointestinal fistulas. Effective and timely removal of leaked intestinal fluid, pancreatic juice, and bile is essential to prevent overflow into the abdominal cavity and to prevent them from lingering on the abdominal wall tissues and skin, eroding nearby tissues and skin. The leaked intestinal fluid, pancreatic juice, and bile should be drained to the outside through the prescribed pathways. When drainage of the gastrointestinal fistula reaches this level, it can be considered a controlled fistula. In a well-controlled fistula, although a large amount of intestinal fluid, pancreatic juice, and bile still leak out daily, there is no intra-abdominal infection or systemic infection caused by it. The tissues around the fistula and the abdominal wall skin are no longer eroded and infected by intestinal fluid, pancreatic juice, and bile. Unless there is a reason why the fistula is not healing, most fistulas will heal spontaneously.

[0006] Existing technologies employ the following drainage methods: 1) porous latex drainage tubes; 2) cigarette drainage tubes; 3) single-lumen negative pressure drainage tubes; and 4) double-lumen negative pressure drainage tubes with drip tubes for continuous drainage (ready-made triple-lumen negative pressure drainage tubes). Among these, single-lumen negative pressure drainage tubes, cigarette drainage tubes, and porous latex drainage tubes have poor drainage effects, and the negative pressure port is prone to contact with tissues and organs, leading to tissue damage. Utility Model Content

[0007] The present invention aims to provide a cannula drainage device based on a digestive tract fistula to solve the problems of poor drainage effect and easy contact between the negative pressure port and tissues and organs, which can lead to tissue damage.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A cannula drainage device based on a gastrointestinal fistula includes an outer tube and an inner tube. One end of the outer tube has several small holes arranged in a row. The inner tube is placed inside the outer tube. The end of the inner tube that is closer to the small holes is shorter than the outer tube. The end of the inner tube that is away from the small holes protrudes through the inner wall of the outer tube. A negative pressure suction device is provided at the end of the inner tube that is away from the small holes. The end of the outer tube that is away from the small holes is connected to the external environment or infused with physiological saline.

[0010] Furthermore, there is a gap of at least 3 mm between the outer tube and the inner tube, and the top of the inner tube is 1-1.5 cm shorter than the top of the outer tube.

[0011] Furthermore, the outer tube and the inner tube are made of medical-grade silicone material.

[0012] Furthermore, the outer tube and the inner tube are designed as separate units.

[0013] Furthermore, the outer tube and the inner tube are designed as a single unit.

[0014] The principle and beneficial effects of this technical solution:

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Safety: There is a 0.3 cm gap between the outer tube and the inner tube, allowing air to enter freely. Leaked intestinal fluid, pancreatic fluid, and bile can enter the gap between the outer tube and the inner tube through a small hole at the front end of the outer tube, and then be sucked out through the inner tube. The inner tube with negative pressure does not come into contact with tissues and organs, so as not to cause tissue damage.

[0017] 2. Excellent drainage: Normal saline is dripped into the outer cannula, and the suction generated by the inner tube automatically cleans the gap between the outer and inner tubes. It also dilutes intestinal fluid, pancreatic fluid, and bile, facilitating drainage and reducing the risk of blockage. This ensures thorough drainage, minimizes corrosion and ulceration of surrounding tissues, avoids skin erosion and corrosion around the fistula, and alleviates patient suffering.

[0018] 3. This utility model solves the problems of gaps in the middle of traditional double tubes, which can easily cause tissue entrainment and easy leakage from subcutaneous punctures. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a cannula drainage device based on a digestive tract fistula;

[0020] Figure 2 A cross-sectional view of a cannula drainage device based on a gastrointestinal fistula;

[0021] The reference numerals in the accompanying drawings include:

[0022] 1. Outer tube; 2. Inner tube; 3. Small hole. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0024] refer to Figure 1 and Figure 2 A cannula drainage device based on a digestive tract fistula includes an outer tube and an inner tube. One end of the outer tube has several small holes arranged in a row. The inner tube is placed inside the outer tube. The end of the inner tube that is closer to the small holes is shorter than the outer tube. The end of the inner tube that is away from the small holes protrudes through the inner wall of the outer tube. A negative pressure suction device is provided at the end of the inner tube that is away from the small holes. The end of the outer tube that is away from the small holes is connected to the external environment or dripped with physiological saline.

[0025] The outer tube and the inner tube are spaced at least 3 mm apart. The tip of the inner tube is slightly shorter than the tip of the outer tube by about 1-1.5 cm. There is a 0.3 cm gap between the outer tube and the inner tube to allow air to enter freely. Leaked intestinal fluid, pancreatic fluid and bile can enter the gap between the inner and outer tubes through the pores of the outer tube and then be sucked out through the inner tube. The inner tube with negative pressure does not come into contact with tissues and organs, so as not to cause tissue damage. The outer tube and the inner tube are made of medical-grade silicone material.

[0026] In one embodiment of the present invention, the outer tube and the inner tube are designed as separate units. During surgery, a 6×9mm ordinary latex rubber drainage tube is inserted as the outer tube, with 2-3 side holes cut at the top. The inner tube uses a standard disposable infusion tubing connected to negative pressure, with a pressure of 0.2-0.4 kPa. The gap between the inner and outer tubes is greater than 0.3 cm. An infusion needle is inserted between the inner and outer tubes through the wall of the outer tube, and the tubes are continuously flushed daily with 3000-4000 ml of normal saline to maintain patency. This method has achieved good therapeutic effects in treating postoperative gastrointestinal fistula complications, and possesses advantages such as simplicity, economy, and good therapeutic efficacy.

[0027] As one embodiment of the present invention, the outer tube and the inner tube are designed as a single unit, and the integrally formed present invention can be directly inserted through the fistula.

[0028] Technical advantages:

[0029] 1. Avoid repeat surgery or multiple surgeries: The outer tube can be made from the latex drainage tube left in the original surgery or a rubber drainage tube can be inserted directly from the fistula.

[0030] 2. Safety: There is a 0.3 cm gap between the outer tube and the inner tube, allowing air to enter freely. Leaked intestinal fluid, pancreatic fluid, and bile can enter the gap between the outer tube and the inner tube through the small hole in the outer tube, and then be sucked out through the inner tube. The inner tube with negative pressure does not come into contact with tissues and organs, so as not to cause tissue damage.

[0031] 3. Excellent drainage: Normal saline is dripped into the outer cannula, and the suction generated by the inner tube automatically cleans the gap between the inner and outer tubes. It also dilutes intestinal fluid, pancreatic juice, and bile, facilitating drainage and reducing the risk of blockage. This ensures thorough drainage, minimizes corrosion and ulceration of surrounding tissues, avoids skin erosion and corrosion around the fistula, and alleviates patient suffering.

[0032] 4. High cure rate for gastrointestinal fistulas: Early formation of a well-formed and complete fistula increases the possibility of fistula healing.

[0033] 5. Economic benefits: It reduces the burden on patients, creates good socio-economic benefits, and has high clinical applicability.

[0034] 6. This utility model solves the problems of gaps in the middle of the double tubes, which can easily cause tissue entrainment and easy leakage from subcutaneous punctures.

[0035] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A fistula-based cuffed drainage device based on a digestive tract fistula, characterized by: It includes an outer tube and an inner tube. The outer tube has several small holes arranged at one end. The inner tube is placed inside the outer tube. The end of the inner tube that is closer to the small holes is shorter than the outer tube. The end of the inner tube that is away from the small holes extends out of the inner wall of the outer tube. A negative pressure suction device is provided at the end of the inner tube that is away from the small holes. The end of the outer tube that is away from the small holes is connected to the external environment or dripped with physiological saline.

2. A fistula-based cased drain device according to claim 1, wherein: The outer tube and the inner tube are spaced at least 3 mm apart, and the top of the inner tube is 1-1.5 cm shorter than the top of the outer tube.

3. The cannula drainage device based on a digestive tract fistula according to claim 1, characterized in that: The outer tube and inner tube are made of medical-grade silicone material.

4. A fistula-based cased drain device according to claim 1, wherein: The outer tube and inner tube are designed as separate units.

5. A fistula-based cased drain device according to claim 1, wherein: The outer tube and the inner tube are designed as a single unit.

Images