Folding and variable-stiffness instrument arm used for natural orifice surgery and application method thereof

Abstract

The invention discloses a folding and variable-stiffness instrument arm used for a natural orifice surgery and an application method thereof. The instrument arm is a surgical support tool with variable size and variable stiffness and comprises a braided tube structure and a sealing film. The sealing film wraps the inside, the outside and the end part of the braided tube structure to form an annual and enclosed inner cavity, in which the braided tube structure is wrapped. An air bag or a driving wire helps increase the diameter of the instrument arm. Gas in the sealing film is extracted. Therefore, a braided tube can be in the rigid and large-diameter state, which provides a bigger channel for subsequent surgical tools. The subsequent surgical tools are prevented from stabling tissue and support is provided for ensuring precision. Gas is allowed to enter the sealing film and the sealing film restores to be in the flexible state. The self-elasticity of the braided tube structure is utilized for returning to the small-diameter state. Therefore, the instrument arm can easily stretch into and get away from a body cavity, helps avoid stabbing and reduces discomfort of a human body.

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 and an application method thereof. 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 develop...

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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