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Variable-rigidity folding and unfolding protective sheath based on layer blocking principle and use method thereof

A variable and rigid technology, applied in the field of natural orifice endoscopic surgical instruments, can solve the problems of small bending curvature, insufficient flexibility, and difficulty in adapting to the complex human cavity environment of the variable-stiffness structure, so as to overcome the difficulties of human access, The effect of support

Pending Publication Date: 2021-05-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this variable stiffness structure has a small bending curvature and insufficient flexibility to adapt to the complex human cavity environment, and its large diameter is likely to cause physical damage such as stabbing and scratching to the cavity tissue during the access process.

Method used

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  • Variable-rigidity folding and unfolding protective sheath based on layer blocking principle and use method thereof
  • Variable-rigidity folding and unfolding protective sheath based on layer blocking principle and use method thereof
  • Variable-rigidity folding and unfolding protective sheath based on layer blocking principle and use method thereof

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] figure 1 It is a schematic diagram of the overall structure of the variable stiffness folding protective sheath based on the layer blocking principle of the embodiment of the present invention, figure 2 for figure 1 A schematic diagram of the A-A cross-sectional structure of the variable stiffness folding protective sheath based on the layer blocking principle of the embodiment of the present invention. see Figure 1-2 As shown, the variable rigidity folding protective sheath 1 of the present invention is composed of a suction tube 1-1, a flexible tubular skeleton 1-2, a blocking layer 1-3 and a sealing film 1-4. The blocking layer 1-3 is arranged in the closed cavity form...

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Abstract

The invention discloses a variable-rigidity folding and unfolding protective sheath based on a layer blocking principle and a use method thereof. The variable-rigidity folding and unfolding protective sheath comprises a flexible tubular framework and a sealing film, the sealing film surrounds the outer side of the outer circumference of the framework and is connected with the two ends of the framework in a sealed mode, and a closed cavity is formed between the sealing film and the framework. A blocking layer formed by distributing a plurality of single-scale-shaped sheets on the outer surface of the framework in a staggered manner is arranged in the closed cavity; the same side end of each single-scale-shaped sheet is fixed with the framework, and the other opposite end of each single-scale-shaped sheet is a free end; an air exhaust opening is formed in one end of the closed cavity; when negative pressure is applied to the closed cavity, the single-scale-shaped sheets are pressed tightly, extrusion force and friction force between the single-scale-shaped sheets are increased, and the variable-rigidity folding and unfolding protective sheath can be in a high-rigidity state. The variable-rigidity folding and unfolding protective sheath has good flexibility in a natural state, can achieve large-curvature bending, and can adapt to a complex cavity environment of a human body, so that a stable and safe entering path is provided for surgical tools.

Description

technical field [0001] The invention relates to the technical field of endoscopic surgical instruments through natural orifice, in particular to a variable stiffness folding protective sheath based on the principle of layer blocking and its use method in endoscopic surgery through natural orifice. Background technique [0002] Transnatural orifice endoscopic surgery refers to a surgical form in which the doctor enters the human body through the natural orifice (such as the esophagus, vagina, etc.) of the surgical tool to complete the surgical operation. Compared with other types of minimally invasive surgery (such as multi-port laparoscopic surgery and single-port laparoscopic surgery), endoscopic surgery through the natural orifice has many advantages such as no scar on the body surface, better postoperative effect, less pain, and shorter hospital stay. . As another revolution in the field of surgery after laparoscopic minimally invasive surgery, natural orifice endoscopic...

Claims

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Application Information

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IPC IPC(8): A61B17/00A61B90/00
CPCA61B17/00234A61B90/08A61B2017/00238A61B2017/0034A61B2017/00336A61B2090/08021
Inventor 左思洋王海波
Owner TIANJIN UNIV
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