SU1644913A1 - Method for outside withdrawal of catheter - Google Patents

Abstract

The invention relates to experimental medicine and can be used for conducting chronic experiments. The goal is to provide control over the state of the catheter and repeated manipulations with it. The method provides long-term functioning of the extracted catheters and the prevention of purulent complications. After removal of the catheter on the skin around it, a hollow tube is formed of the skin flap with the epidermis inside. The tube is immersed subcutaneously, leaving holes at its ends. The outer end of the catheter is pulled out through these holes, and after the end of the manipulation, it is again immersed in the skin tube (L

Description

The invention relates to medicine, in particular to experimental surgery, and can be used to bring catheters and electrodes to the outside in chronic experiments.

The aim of the invention is to provide monitoring of the condition of the catheter and to perform repeated manipulations by placing the outer end of the catheter into the hollow tube from the skin flap of the epidermis inward.

The method is carried out as follows.

The test animal was carefully shaved to the intended area of the surgical floor, and after being treated with antiseptic solutions under intravenous potentiated anesthesia, the patient was accessed and catheterized (or implanted the electrode). Then, on the prepared skin area, two parallel incisions of 8-10 cm in length were made 3-5 cm apart from each other. Thus, in order to form two medial and two lateral (free) edges, the skin under the medial and lateral edges is separated at a distance of 1-2 cm from the subcutaneous tissue. By puncturing the skin and soft tissues of the skin graft, the outer end of the catheter is removed. Then proceed to the formation of the skin tube. To do this, first the medial edges of the flap, stitching, are turned inward until a tube is formed. Above this hollow tube, free lateral edges are stitched, leaving openings at the ends through which the outer end of the catheter is led. The distance between parallel skin incisions of 3-5 cm allows the formation of a skin tube with a diameter of 0.9-1.6 cm, which is quite sufficient.

four

five

but

with

but to bring several catheters into its lumen, although the above values may vary depending on the purpose of the experiment.

Example. A healthy mongrel dog weighing 14 kg, after a preliminary careful shaving of the abdomen and right side under intravenous potentiated anesthesia, a midline laparotomy was performed for 20 cm. siliconized heparinized catheter with a diameter of 3 mm. In the area of the aperture, the catheter was stitched and fixed with a collar suture with an atraumatic 4/0 thread. In the same way, the caudal crawled vein (through one of the lateral veins) with a 4 mm diameter catheter fixed to the central end of the lumbar vein was isolated and catheterized to 8 cm.

Then the dog was turned to the left side and after careful processing of the right side lateral inguinal fold in the transverse direction, 2 parallel cuts were made in length up to 1C cm each, 5 cm apart from each other. Formed and separated lateral and medial skin edges. By puncturing the vertebral part of the flap with a thin trocar, both catheters are pulled out in a row. Medial skin edges with each other with skin wrapped inside. Then, lateral skin edges are sutured over the formed skin tube. 8, the opening of the tube to the spine is freely withdrawn and both catheters are masked back. The diameter of the skin tube is 15 mm. Paradise and tubes were treated with a 3% iodine solution. The next day, the dog's condition is good. The toilet of a skin tube and a postoperative wound is made. Checking the functioning of catheters: free blood supply from both vessels, and from the artery by a pulsating jet. The catheters are rinsed with a solution of heparin (1:10), plugged with stoppers, and spun1 into the skin tube.

Starting with 4.dn after surgery on a dog, experiments were conducted to study the characteristics of systemic gas exchange. Adequate catheter functioning in good condition of the skin tube was observed for 60 days after surgery, then thrombosis occurred at the beginning of the aenous (b1 day, and after arterial (84 day) catheters.

The proposed method is tested from 14 healthy mongrel dogs.

The application of the proposed method “the use of his removal of catheters allowed us to eliminate the purulent complications, which caused a violation of the protection of the catheters & control group of animals, as well as increase the duration of the functioning of the latter.

This facilitates the care of animals and the repetition of manipulations with the catheter for several times.

Claims (1)

Invention Formula The method of external removal of the catheter, which involves immersing its outer end subcutaneously, is necessary in order to monitor the state of the catheter and perform repeated manipulations, after removing cathe-reps on the skin around it, a hollow tube is formed from a skin graft epidermis inward and immersed subcutaneously, leaving a hole at the ends of the tube.