A folding and expanding variable stiffness instrument arm for natural orifice surgery

Abstract

The invention discloses a folding and variable stiffness instrument arm for natural orifice surgery. The instrument arm is a surgical support tool with variable scale and variable rigidity, including a braided tube structure and a sealing membrane, and the sealing membrane includes The inner and outer sides and ends of the braided tube structure are covered to form an annular closed inner cavity, and the braided tube structure is covered inside it. The diameter of the instrument arm can be increased through the airbag or the driving wire, and the gas in the sealing membrane can be extracted to make the braided tube appear rigid and large-diameter, providing a larger passage for subsequent surgical tools, preventing subsequent tools from poking tissue, and providing Supports guarantee precision. It can also restore the soft state by re-entering the gas in the sealing film, and use the elasticity of the braided tube structure to return to the small-diameter state, so that the arm of the device can be more easily extended into and out of the human body cavity, and avoid puncture injuries and reduce human discomfort. .

Description

technical field [0001] The invention relates to the field of natural orifice surgery, in particular to a folding-expanding variable-rigidity instrument arm for natural orifice surgery. Background technique [0002] With the development of science and technology, the surgical operation mode has gone through laparotomy, minimally invasive surgery, single-port surgery, and is moving towards the non-invasive surgery of natural orifice transluminal endoscopic surgery (NOTES) through the natural orifice of the human body. transition. The so-called NOTES refers to the surgical mode in which surgical tools enter the human body through the orifices of the human body, including the oral cavity, vagina, anus, etc., and reach the lesion for surgical operations. Compared with other surgical modes, NOTES has less interference to the internal environment, has the advantages of less pain, shorter hospital stay, and no scar on the skin, and has good development prospects. Since the emergen...

AI Technical Summary

Problems solved by technology

[0004] During the entire operation process, surgical instruments are prone to two problems: 1) The complex internal cavity of the human body requires good flexibility of the instrument, while the slender tool needs sufficient rigidity to ensure accuracy, and there is a contradiction in the demand for the rigidity of the instrument

2) The complex tool transmission system makes it difficult to reduce the size of the instrument, and the space of the human body cavity is very limited. The geometric contradiction makes it difficult for the tool to enter the human body, which may easily cause discomfort or even puncture

However, the extra structure makes the device wall thicker and takes up more space, and the bending curvature is small, which makes it difficult to pass through complex environments. The device is thicker and does not have a variable scale, and it is still easy to cause puncture when it is pushed into the human body in a passive form.

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