A multi-degree-of-freedom laparoscopic surgical instrument

Abstract

The invention relates to a laparoscopic surgery instrument with multiple degrees of freedom. The laparoscopic surgery instrument comprises a handle, an instrument casing pipe and a tong head, wherein the handle is arranged at the near end of the instrument casing pipe; the motion between the tong head and a spanner is realized by a push rod; a section of bendable flexible transmission component is arranged at the front end of the push rod and used for transmitting force and torque; a rotary knob is arranged at the handle; the near end of the push rod penetrates through the center of the rotary knob and moves relative to the axial line of the rotary knob, but the rotary motion is restricted; when the rotary knob is rotated, the rotary knob can drive the push rod to rotate relative to the outer casing pipe, and further drive the tong head to rotate relative to the outer casing pipe through transmission of the flexible transmission component; a bending unit is arranged on the corresponding periphery of the flexible transmission component and controlled by a mechanism at the handle part to be bended and deformed. Compared with the conventional instrument, the laparoscopic surgery instrument disclosed by the invention has more degrees of freedom and flexibility, and can be suitable for the latest single-port laparoscopic technology; the handle of the instrument is designed to conform to human factor engineering, and can be operated by one hand to finish all actions of the instrument.

Description

technical field [0001] The invention belongs to the technical field of minimally invasive abdominal surgery instruments, in particular to a multi-degree-of-freedom laparoscopic surgical instrument. Background technique [0002] Minimally invasive surgery is the most cutting-edge development direction of medical science and technology today. Minimally invasive surgery represented by laparoscopic surgery has gradually replaced traditional laparotomy. After more than 20 years of development, the technique of laparoscopic minimally invasive surgery has gradually matured. Because of its small surgical trauma, mild postoperative pain, short hospital stay, and good cosmetic effect, it has been widely used and satisfied in clinical practice. Effect. Conventional laparoscopic surgery is performed through multiple (3-5) tiny (5-12mm) incisions. With the enrichment of clinical experience and the advancement of engineering technology, the concept of single-port laparoscopic surgery has...

AI Technical Summary

Problems solved by technology

But complicated operations such as suturing and knotting still bother doctors

Therefore, traditional laparoscopic surgical instruments cannot meet the development of single-port laparoscopic surgery in some special operations. Single-port surgery requires instruments to have more degrees of freedom and greater flexibility to increase their operability

[0004] Moreover, traditional instruments can only provide four degrees of freedom during use. The opening and closing of the claws at the front end of the instrument rely on the push rod in the middle. The push rod can only move along the axial direction of the instrument and cannot provide a single degree of freedom of rotation, namely Independent rotation of the tip relative to the instrument outer sleeve is not possible

If you want to rotate the front end of the instrument, you must rotate the whole instrument, which is very inconvenient in suturing and knotting operations

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