Endoscope surgical instrument outer sheath with variable rigidity
A technique for surgical instruments and outer sheaths, applied to endoscopes, surgical instruments, internal fixators, etc., can solve the problems of inability to freely change stiffness, poor adaptability to the cavity environment, complex structures, etc., and improve surgical safety. , large expansion rate, the effect of improving adaptability
Inactive Publication Date: 2015-07-08
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
However, the structure of the device is complex, and it can only achieve two-dimensional bending, which has poor adaptability to the environment of the cavity. The locking device can only lock the shape and cannot realize free variable stiffness.
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[0023] Such as Figure 1 to Figure 5 As shown, the present invention is composed of several variable rigidity flexible units connected in series, and each flexible unit includes: a first flexible high-stretch airbag 1, a second flexible high-stretch airbag 2, a third flexible high-stretch airbag 3, a rigid connection 4, rigid wire 5, first disk 6, second disk 7, instrument channel 8, air inlet 9 and airway channel 10; in each flexible unit, rigid wire 5 passes through several rigid connectors 4 And rigidly connected with it, the round hole on the rigid connector 4 is set at the minimum diameter position of the airbag to connect three flexible high-stretch airbags together, and the two ends of the three flexible high-stretch airbags are respectively connected to the first disk 6 , the second disk 7 are connected, the instrument channel 8 is located at the center of the rigid connector 4, the air inlet 9 and the airway channel 10 are arranged on the second disk 7; the multi-sect...
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The invention discloses an endoscope surgical instrument outer sheath with variable rigidity and belongs to the technical field of minimally invasive surgical instruments. The endoscope surgical instrument outer sheath is composed of a plurality of variable-rigidity flexible units. Each variable-rigidity flexible unit comprises an instrument passage, three high-flexibility air bags, rigid connectors, a rigid wire and two discs; the rigid wire penetrates the rigid connectors and is connected with the same rigidly, the three high-flexibility air bags are connected by the method of looping the minimum-diameter positions of the air bags by round holes of the rigid connectors, and two ends of each of the three high-flexibility air bags are connected with the first disc and the second disc respectively. Spatial bending and rigidity adjusting can be realized by controlling internal pressure of the air bags. The endoscope surgical instrument outer sheath can be fit with the physiological curves of cavities of the human body, does not compress the inner-wall tissues, provides mechanical support to the surgical instruments by means of rigidity adjustment after reaching at focuses, and assists doctors to do operation more effectively on the premise of guaranteeing safety of minimally invasive surgery.
Description
technical field [0001] The invention relates to a surgical instrument outer sheath in the field of minimally invasive medical instruments, in particular to a variable sheath that provides passages for endoscopic surgical instruments to enter and leave the human body, and improves the flexibility and surgical safety of minimally invasive endoscopic surgical instruments. Rigid outer sheath for endoscopic surgical instruments. Background technique [0002] Endoscopic surgery through the natural orifice is a minimally invasive surgical treatment method for treating celiac diseases through the natural orifices such as the mouth, vagina, and colorectum without skin incisions using a soft endoscope as a treatment tool. Less contact with organs can reduce the trauma caused by traditional open surgery and laparoscopic surgery, reduce postoperative pain, and avoid complications such as wound infection, incisional hernia, and intestinal obstruction. At present, due to the functional l...
Claims
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IPC IPC(8): A61B1/012A61B17/94
Inventor 罗云赵儒镇赵爽李祥张文光
Owner SHANGHAI JIAOTONG UNIV