CN-122004950-A - Negative pressure rotary cutter for endoscope

Abstract

The invention discloses an endoscope negative pressure rotary cutter which comprises a handle, a battery, a motor, a switch, a connecting hole, a square hole, a clamping groove, a fixing rod, an inner shaft and a shaft sleeve, wherein the battery and the motor are arranged in the handle, the switch is arranged on the surface of the handle, the connecting hole on the end face of one end is a blind hole, an output shaft of the motor extends into the hole through the bottom of the motor, the square hole is arranged at the end part of the motor, the clamping groove is in an L shape, the inner side wall of the connecting hole is arranged, the device further comprises an outer tube, a clamping bolt, a branch tube, a cutting head, a fixing rod, an inner shaft and a shaft sleeve, one end of the outer tube is inserted into the connecting hole and is fixed, the outer side wall is provided with the branch tube, the other end of the outer tube is in movable sealing connection with the cutting head and can rotate relatively, the fixing rod is arranged in the cutting head, the inner shaft penetrates through the outer tube and is provided with a square shaft head, one end of the outer tube extends out of the outer tube and is in a diameter of the square shaft head, the inner shaft is inserted into the square hole, a gap between the inner shaft and the outer tube is provided with the square shaft, and the other end is fixed on the fixing rod.

Inventors

• TONG XIYU

Assignees

• 仝锡钰

Dates

Publication Date

20260512

Application Date

20260316

Claims (2)

1. 1. An endoscope negative pressure rotary cutter is characterized in that: comprises a handle, a battery, a motor, a switch, a connecting hole, a square hole and a clamping groove, wherein the handle is of a strip box-shaped structure, the battery and the motor are arranged in the handle, the surface mounting is used for controlling the switch of the motor, the connecting hole is arranged on the end face of one end of the motor, the connecting hole is a blind hole and is similar to the motor, an output shaft of the motor stretches into the hole through the bottom of the connecting hole, the end part of the output shaft is provided with the square hole, the square hole is a blind hole, the clamping groove is L-shaped and is arranged on the inner side wall of the connecting hole, the negative pressure rotary cutter of the endoscope further comprises an outer tube, a clamping bolt, a branch tube, a cutting head, a fixing rod, an inner shaft and a shaft sleeve, the outer tube is made of hard materials with lubricating characteristics, one end of the outer tube can be inserted into the connecting hole to be connected, the outside of the tube wall of the end tube is provided with the clamping bolt which is used for being meshed and fixed with the clamping groove, the outer side wall of the outer tube is also provided with the branch tube which is communicated with the clamping bolt, the other end of the outer tube is sleeved outside the proximal end of the cutting head, the cutting head is a cylindrical metal tube which is communicated with the tube cavity of the outer tube and is in dynamic sealing connection, the dynamic sealing is contact sealing realized by adopting a medical miniature elastic sealing ring, the two sealing rings can rotate relatively, the fixed rod and the inner diameter of the cutting head are equal in length, the two ends of the fixed rod and the inner diameter of the cutting head are respectively fixed on the inner walls of the two sides of the proximal end of the cutting head, the inner shaft is a bendable metal flexible shaft which is penetrated in the outer tube and can rotate relatively, one end of the inner shaft is inserted into the connecting hole end of the outer tube to extend out of the tube cavity, and the diameter of the inner shaft is thickened into a square shaft head, the cutting head is characterized in that the cutting head can be inserted into the square hole to realize driving connection, a gap between the inner shaft and the outer tube at the end is sealed at the tube orifice of the outer tube through the shaft sleeve, the inner shaft is limited from moving transversely and longitudinally, and the other end of the inner shaft extends into the cutting head through the tube cavity of the outer tube and is fixed on the midpoint of the fixing rod.
2. 2. The negative pressure rotary endoscope cutter according to claim 1, further comprising a cutting window, a specimen bin, a filter screen, a cross rod and a cutter, wherein the side wall of the distal end section of the cutting head is provided with the cutting window with sharp edges, the edges on both sides and the distal end of the cutting window are respectively provided with sharp edges, the edges adopt a blunt edge guiding groove design, the outer side edges of the edges are smooth round corners, the inner side edges of the edges are sharp edges, the interior of the cutting head is provided with the specimen bin and the filter screen sequentially from the cutting window to the cavity between the fixing rods, the specimen bin is a tube cavity of the cutting head, the filter screen is of a star-shaped bracket structure, the periphery of the filter screen is fixed on the inner wall of the cutting head, a fan-shaped gap for the fluid to pass through is formed between the adjacent ribs, the gap size allows the fluid such as blood, mucus to pass through, and the like, simultaneously and the tissue fragments are effectively blocked, the inner diameter of the fluid from the cutting window is fixed on the inner side of the inner wall of the cutting head, the filter screen is of a star-shaped bracket structure, the filter screen is fixed on the inner wall of the cutting head, and the cross rod is provided with a dynamic cross rod, and the cross rod is fixed on the inner wall of the cutting head, and the cross rod is provided with a long section.

Description

Negative pressure rotary cutter for endoscope Technical Field The invention relates to the technical field of medical instruments, in particular to an endoscope negative pressure rotary cutter. Background At present, common methods for performing pathological diagnosis on a pathological tissue specimen in a cavity obtained through an endoscope comprise biopsy forceps clamping, frozen probe freezing and the like, and the methods are mature in technology and convenient to operate and are widely applied in clinic. However, in practice, the above-mentioned devices have problems in that 1, biopsy forceps require a certain space for opening, and the operation in a narrow lumen is limited, and the forceps are difficult or small to grasp tissue, and it is often difficult to obtain a satisfactory tissue specimen. 2. The freezing probe freezing and taking operation method is rough and is easy to pull and tear to damage peripheral tissues, and even causes complications such as massive hemorrhage. Disclosure of Invention In order to solve the defects in the prior art, the invention provides the negative pressure rotary cutter for the endoscope, which is used for fixing tissues through negative pressure adsorption by a cutting head and rotationally cutting to obtain a sample, so that the operation in a narrow space can be realized, and the damage to surrounding tissues is avoided. The technical scheme includes that the negative pressure rotary cutter for the endoscope comprises a handle, a battery, a motor, a switch, a connecting hole, a square hole and a clamping groove, wherein the handle is of a strip box-shaped structure, the battery and the motor are arranged in the handle, the switch for controlling the motor is arranged on the surface of the handle, the connecting hole is arranged on the end face of one end of the handle, the connecting hole is a blind hole and is similar to the motor, an output shaft of the motor extends into the hole through the bottom of the connecting hole, the square hole is arranged at the end part of the output shaft, the square hole is a blind hole, and the clamping groove is L-shaped and is arranged on the inner side wall of the connecting hole; the negative pressure rotary cutter for endoscope further comprises an outer tube, a latch, a branch tube, a cutting head, a fixing rod, an inner shaft and a shaft sleeve, wherein the outer tube is made of hard materials with lubricating property, one end of the outer tube can be inserted into the connecting hole to be connected, the latch is arranged at the outer side of the tube wall of the end and is used for being meshed and fixed with the latch, when the outer tube is inserted into the connecting hole, the latch is firstly clamped into the vertical section of the latch, and the outer tube is continuously inserted and rotated, so that the latch enters the transverse section of the latch and is meshed, the outer tube is fixed in the connecting hole and cannot be separated and rotated, the branch tube communicated with the outer tube is further arranged on the outer side wall of the outer tube, the other end of the outer tube is sleeved at the outer portion of the proximal end of the cutting head, the cutting head is a cylindrical metal tube and is communicated with the tube cavity of the outer tube to be in movable sealing connection, and the movable sealing is a contact sealing mode by adopting a medical miniature elastic sealing ring, and the two can relatively rotate, so that the branch tube is fixed in the connecting hole, and the connecting hole can be separated from the connecting hole, the outer tube and the tube cavity of the cutting head are mutually communicated, the negative pressure suction device is connected with the branch tube, the negative pressure sequentially passes through the branch tube and the outer tube to reach the cutting head so as to realize the adsorption fixation of the cutting head to tissues, the fixing rod and the inner diameter of the cutting head are equal, two ends of the fixing rod are respectively fixed on the inner walls of two sides of the proximal end of the cutting head, the inner shaft is a flexible metal flexible shaft which penetrates through the inner tube and can relatively rotate, one end of the inner shaft is inserted into the tube cavity of the connecting hole end of the outer tube to extend out of the tube cavity of the outer tube, the diameter of the inner shaft is thickened to form a square shaft head which can be inserted into the square hole to realize driving connection, the gap between the inner shaft and the outer tube at the tube mouth of the outer tube is closed through the shaft sleeve, the inner shaft mouth of the outer tube is limited to move transversely and longitudinally, and the other end of the inner shaft extends into the cutting head through the tube cavity of the outer tube and is fixed on the middle point of the fixing rod, and thus the output shaft is driven to rotate and