Transdermal element with airbag type switch

Abstract

The invention relates to percutaneous device equipped with air-pocket switch, comprising percutaneous device body (1), capsule air-pocket (2), one-way charge valve (3), discharge valve (4) and helmet (5). The capsule air-pocket is located in the internal cavity of percutaneous device, the upper middle part of percutaneous device is equipped with three holes I, II, and III, pore I and II are connected with capsule air-pocket, pore I is equipped with one-way charge valve (3), pore II is equipped with discharge valve (4), pore III is conduit or wire passage. The helmet matches with pore III. The method for preparing percutaneous device comprises: mixing polymethyl vinylsiloxane, hydrogen-containing silicone oil and hydroxyapatite according to a certain proportion, degassing, injection molding and stewing for 16-24 hours at 80 Deg . C and 1 Mpa. The bioavailability and mechanics performance of percutaneous device are good. When there is no air in the air-pocket, the device is unblocked, and when it is aerated, the air in filled in the percutaneous device, and prevents matter circulation, and acts as a switch.

Description

Technical field: [0001] The invention relates to a transdermal element, in particular to a preparation method of the transdermal element with an air bag switch. Background technique: [0002] The transdermal device is a new type of interventional medical and diagnostic medical device that is implanted subcutaneously for a long time to transmit substances and information inside and outside the body. It can be used clinically for dialysis, body fluid drainage, drug injection, and internal information observation. [0003] Transdermal components have used materials such as tantalum, glass carbon, polytetrafluoroethylene (PTFE), titanium, and hydroxyapatite (HA). However, except for HA, the biocompatibility of the rest of the materials is not ideal, causing the skin to grow downwards. , while HA with good biocompatibility has poor processability, and it is not easy to process transdermal components with complex shapes. [0004] At present, in the transmission process of substan...

AI Technical Summary

Problems solved by technology

[0005] 1. The direct puncture method not only brings pain to the patient, but also causes tissue sclerosis and other symptoms due to long-term puncture (such as hemodialysis, etc.)

[0006] 2. Simple catheter method, the transmission process of substances or information inside and outside the body depends on the catheter to connect the inside and the outside. At the position where the catheter passes through the skin, the catheter directly contacts the skin tissue, causing the skin tissue around the catheter to grow downward to form grooves and produce bacteria The accumulation and reproduction of

At the same time, with this method, the patient must carry some auxiliary equipment (such as urine bag, etc.) at any time, which brings inconvenience to the patient's daily life and has potential safety hazards.

[0007] 3. The catheter method with percutaneous components, this method is currently limited to the experimental stage, and there is no relevant clinical report

The transmission process of substances or information inside and outside the body depends on the catheter to connect the inside and outside, and a percutaneous component is implanted at the position passing through the skin, but this component only blocks the contact between the catheter and the skin tissue, and does not have the function of a switch itself.

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