WO2021012305A1

WO2021012305A1 - Medical saw disc mechanism and usage method therefor

Info

Publication number: WO2021012305A1
Application number: PCT/CN2019/098628
Authority: WO
Inventors: 李桂林; 赵继云; 金欣; 陈羽; 曹超
Original assignee: 徐州市妇幼保健院; 中国矿业大学
Priority date: 2019-07-25
Filing date: 2019-07-31
Publication date: 2021-01-28
Also published as: CN110368058B; CN110368058A

Abstract

Disclosed is a medical saw disc mechanism, comprising a detaching unit and a recovery unit, wherein the detaching unit comprises a sleeve (10), a saw disc (2), and a front shell (14), one end of the sleeve (10) is in corresponding connection with the recovery unit, the saw disc (2) is arranged at the end, away from the recovery unit, of the sleeve (10), the recovery unit comprises an electric motor (18), the power output end of the electric motor (18) is connected to a rotating shaft of the saw disc (2) in a matching manner, the front shell (14) comprises a cover body (141) and a rod member (142), the cover body (141) is connected to the sleeve (10) and is arranged outside the saw disc (2) in a wrapped manner, one end of the rod member (142) is connected to the cover body (141), and the other end of the rod member (142) extends in the direction away from the recovery unit; and the saw disc mechanism is compact in structure and simple in control, the mechanism transmission is stable, the cost of disposable consumables is low, electricity supply and power output portions can be used repeatedly, effectively saving on operating costs.

Description

Medical saw disk mechanism and use method thereof

Technical field

The invention relates to the field of medical equipment, in particular to a medical saw disk mechanism.

Background technique

In organ resection surgery, electrosurgical knife, ultrasonic knife, P knife, etc. are often used for surgery. These instruments are expensive to purchase and maintain, and the surrounding tissues are accidentally injured during use. Taking hysterectomy as an example, according to how many laparoscopic procedures are completed, it is divided into the following four surgical procedures: Type A (complete removal of cervical tissue): including laparoscopic total hysterectomy (TLH) and laparoscopic assisted vaginal uterus Two types of resection (LAVH); type B (full or partial preservation of cervical tissue): including laparoscopic subtotal hysterectomy (LSH) and laparoscopic intrafascial hysterectomy (CICH).

When removing the uterus, use a cylindrical rotary knife to crush the uterine body tissue into strips. When there is no rotary knife, open the posterior fornix and take it out, or make a small incision in the abdominal wall. Relatively speaking, the latter two methods are easy to damage the ureter, bladder and rectum during the operation, and the wound is relatively large, so they should not be used. The use of a cylindrical rotary cutter can keep the vaginal anatomy intact, and at the same time achieve the purpose of total hysterectomy, but it is not very convenient to remove and clean the uterine tissue after crushing.

Therefore, it is necessary to invent a medical saw disk mechanism that is simple to operate, safe and stable in work, and cost-saving.

technical problem

Avoid accidentally wounding surrounding tissues and inconvenient removal of cut tissues during organ resection.

Technical solutions

A medical saw disc mechanism of the present invention includes a disassembly unit and a recovery unit; the disassembly unit includes a sleeve, a saw disc, and a front housing; one end of the sleeve is connected to the recovery unit correspondingly; the saw disc is provided On the end of the sleeve away from the recovery unit; the recovery unit includes a motor; the power output end of the motor is matedly connected with the rotating shaft of the saw disk; the front housing includes a cover and a rod; the cover and the barrel The rod is connected with the body, and is wrapped and arranged on the outside of the saw disk; one end of the rod is connected with the cover body, and the other end extends in a direction away from the recovery unit.

Further, the recovery unit further includes a rear housing, a coupling, and a long shaft; the motor, the coupling and the long shaft are arranged in the rear housing; the long shaft is connected to the power output of the motor through the coupling End connection; the end of the long shaft away from the motor extends into the sleeve; the disassembly unit includes a bevel gear set; the corresponding end of the long shaft is in a drive fit with the bevel gear set; the bevel gear set and the saw Disk drive coordination.

Further, the bevel gear set includes a first bevel gear, a second bevel gear and a gear shaft; the gear shaft is nested and matched with the rotation center of the saw disk to rotate synchronously; and the second bevel gear is sleeved On the gear shaft; the first bevel gear and the second bevel gear are arranged in engagement with each other; the corresponding end of the long shaft is connected with the rotation center of the first bevel gear.

Further, the end surface of the first bevel gear facing the long shaft is provided with a positioning groove; the long shaft is correspondingly embedded in the positioning groove.

Further, a deep groove ball bearing is provided on the side of the sleeve inside the sleeve close to the rear housing; the side of the deep groove ball bearing away from the saw disk is provided with a shaft end retaining ring and a felt ring.

Further, the disassembly unit further includes a baffle; the baffle is connected and arranged on the other side of the cylinder opposite to the rod; the baffle is an inwardly folded arc-shaped plate structure.

Further, the method for using the medical saw disc mechanism includes the following steps:

Step 1: Extend the mechanism into the human body, insert the rod part of the front shell into the inside of the target organ, and the baffle is attached to the outer wall of the target organ;

Step two, under the guidance of the laparoscope, start the motor to drive the saw disc to rotate to cut the organs and tissues between the saw disc and the baffle. The baffle protects tissues other than the target organ from being cut by mistake during this process; The body plays the role of opening up the organ opening and opening up space for the saw disk work;

Step 3: After one side of the organ is cut, use the rod as the center of rotation to adjust the organ area corresponding to the saw disc, and then cut the organ tissue in the same way, and finally divide the target organ into several petal shapes;

Step 4: Turn off the saw disc mechanism and retract it on the tool disc. Use graspers and other instruments to clamp one end of the incision target organ, and pull them out of the body respectively;

Step 5. After the operation is completed, the disassembly unit part of the saw disc mechanism is separated and discarded in a waste box, and the recovery unit part is disinfected for next use.

Beneficial effect

A medical saw disc mechanism of the present invention includes a disassembly unit and a recovery unit; the disassembly unit includes a sleeve, a saw disc, and a front housing; one end of the sleeve is connected to the recovery unit correspondingly; the saw disc is provided On the end of the sleeve away from the recovery unit; the recovery unit includes a motor; the power output end of the motor is matedly connected with the rotating shaft of the saw disk; the front housing includes a cover and a rod; the cover and the barrel The saw disk is connected with the body, and is wrapped and arranged on the outside of the saw disk; one end of the rod is connected with the cover body, and the other end extends away from the recovery unit; the saw disk has a compact structure, simple control, and stable transmission of the mechanism. The cost of disposable consumables Low, power supply and power output parts can be reused, effectively saving operation costs.

Description of the drawings

Figure 1 is a front view of the saw disk mechanism;

Figure 2 is a top view of the saw disk mechanism;

Figure 3 is a side view of the saw disk mechanism;

Figure 4 is a schematic diagram of the structure of the disassembly unit;

Figure 5 is a schematic diagram of the support frame structure;

Figure 6 is a schematic diagram of the rear housing structure;

Fig. 7 is a schematic diagram of hysterectomy using an institution.

Embodiments of the invention

A medical saw disk mechanism, as shown in FIG. 1 and FIG. 3, includes a disassembly unit and a recovery unit, which can be quickly assembled and disassembled through a threaded connection; the disassembly unit includes a sleeve 10 The saw disc 2 and the front housing 14; one end of the sleeve 10 is connected to the recovery unit correspondingly; the saw disc 2 is arranged on the end of the sleeve 10 away from the recovery unit; the recovery unit includes a motor 18, a motor 18 is powered by a battery 19; the power output end of the motor 18 is connected to the rotating shaft of the saw disk 2; the front housing 14 is processed by injection molding, which plays the role of positioning and supporting other structures; as shown in Figure 4 As shown, the front housing 14 is a combined structure, which specifically includes a cover body 141 and a rod 142; the cover body 141 is connected to the cylinder 10, is provided on the outside of the saw disk 2, and is used for the bevel gear set The installation and positioning ensure that the reliable transmission of the rotation movement is not interfered by external objects; one end of the rod 142 is connected with the cover body 141, and the other end extends away from the recovery unit, and is used to penetrate the fundus of the uterus to achieve positioning during the operation.

The recovery unit also includes a rear housing 16, a coupling 17 and a long shaft 15. As shown in FIG. 5, a support frame 20 is also provided in the rear housing 16, and the surface of the support frame 20 is provided with an embedded groove, which can be used To fix the positions of the battery 19 and the motor 18, and leave a wire hole for connecting with the corresponding circuit board 22; the circuit board 22 is a component that can be purchased directly from the market, and will not be repeated here; the rear housing 16 serves as a hand grip The grip part; the rear shell 16 is covered with an isolating rubber sleeve when working, and the power supply part inside the protection period is not contaminated and reused; the rubber sleeve is a disposable sterile article with greater elasticity and can be firmly attached to the rear As shown in Fig. 6, the rear part of the rear case 16 is provided with a rear cover 23 in a sealing fit to facilitate the assembly of internal components; the surface of the rear case 16 is also inlaid with a push switch 21. The switch 21 is in control connection with the motor 18; the motor 18, the coupling 17 and the long shaft 15 are arranged in the rear housing 16; the long shaft 15 is connected to the power output end of the motor 18 through the coupling 17; The end of the long shaft 15 away from the motor 18 extends into the sleeve 10; the disassembly unit includes a bevel gear set; the corresponding end of the long shaft 15 is in a transmission match with the bevel gear set; Saw disk 2 is matched in transmission.

The bevel gear set includes a first bevel gear 8, a second bevel gear 3, and a gear shaft 4. As shown in FIG. 2, the second bevel gear 3 is fixed by a gear shaft 4, an end cover 5 and a screw 6. On the side plate of the front housing 14; the gear shaft 4 is nested and matched with the rotation center of the saw disk 2 to rotate synchronously; the second bevel gear 3 is sleeved on the gear shaft 4; the first cone The gear 8 and the second bevel gear 3 are engaged with each other; the corresponding end of the long shaft 15 is connected to the rotation center of the first bevel gear 8 so that the power output by the motor 18 can be transmitted to the saw disk 2.

The end surface of the first bevel gear 8 facing the long shaft 15 is provided with a positioning groove; the long shaft 15 is correspondingly embedded in the positioning groove; the long shaft 15 and the coupling 17 are also inserted in the same way. The connection structure, in the case of a compact overall structure, is not only stable in transmission, but also easy to disassemble, which simplifies maintenance work.

The shaft end of the first bevel gear 8 is positioned in the front housing 14 through the miniature bearing 9, the sleeve 10 and the deep groove ball bearing 11 to ensure smooth rotation; the inside of the sleeve 10 is close to the rear housing A deep groove ball bearing 11 is provided on one side of the 16; a shaft end retaining ring 12 and a felt ring 13 are provided on the side of the deep groove ball bearing 11 away from the saw disk 2, which can achieve sealing and ensure that the rear housing 16 does not Be contaminated.

The disassembly unit also includes a baffle 1; the baffle 1 is connected to the other side of the cylinder 10 opposite to the rod 142; the baffle 1 is an inwardly folded arc-shaped plate structure that can rotate to a certain degree Angle, can protect the remaining external tissues during the operation.

The method of using the medical saw disc mechanism includes the following steps:

Step 1: Extend the mechanism into the human body, the rod 142 of the front housing 14 is partially inserted into the target organ 30, and the baffle 1 is attached to the outer wall of the target organ 30;

Step two, under the guidance of the laparoscope, start the motor 18 to drive the saw disc 2 to rotate, and cut the organ tissue between the saw disc 2 and the baffle 1, and the baffle 1 protects tissues other than the target organ 30 in the process Not to be cut by mistake; the cover 141 plays a role in opening up the opening of the organ and opening up space for the saw disk work;

Step 3: After one side of the organ is cut, use the rod 142 as the center of rotation to adjust the organ area corresponding to the saw disk 2, and then cut the organ tissue in the same way, and finally divide the target organ into several petal shapes;

Step 5: After the operation is completed, the disassembly unit part of the saw disc mechanism is separated and directly discarded in the waste box, and the recovery unit part is disinfected for next use.

Here is an example of hysterectomy. As shown in Figure 7, the method of use is: extend the mechanism into a mini-wound about 4 cm, and the rod 142 passes through the uterine cavity and penetrates the fundus 1~2 cm to fix the cervix , The baffle 1 fits on the outside of the uterus to protect the external tissues of the uterus from being accidentally cut and not to damage the vaginal wall; the cover 141 plays a role in opening the uterine cavity and protecting the rest of the tissues and ensuring the work of the saw disk; assists in guiding the laparoscope Next, the motor 18 is started to drive the circular saw disc 2 to rotate at a high speed to cut the uterine cavity tissue between the saw disc 2 and the baffle 1. After a cut is completed, the mechanism is rotated around the rod 142, and then Cut the uterine cavity tissue in other areas, and finally divide the target organ into several petal shapes; then shut down the saw disk mechanism and retract it on the tool tray for postoperative treatment; use graspers and other instruments to clamp the cut One end of the uterus can pull the uterus out of the vagina. Compared with the way of pulverizing the uterus through the abdomen, this operation can significantly shorten the operation time, and it is not easy to have broken tissue residue; after the operation is completed, the disassembly unit part of the saw disc mechanism It is separated and discarded in a waste box, and the recycling unit is partially sterilized, recycled and reorganized for next use, effectively saving surgical costs.

Industrial applicability

The medical saw disc mechanism can be used in hysterectomy and other operations.

Claims

A medical saw disk mechanism, characterized in that it includes a disassembly unit and a recovery unit; the disassembly unit includes a sleeve (10), a saw disk (2) and a front housing (14); the sleeve (10) One end is correspondingly connected with the recovery unit; the saw disk (2) is arranged on the end of the sleeve (10) away from the recovery unit; the recovery unit includes a motor (18); the power output end of the motor (18) is connected to The rotating shaft of the saw disc (2) is mated and connected; the front housing (14) includes a cover (141) and a rod (142); the cover (141) is connected to the cylinder (10), and is arranged in The outside of the saw disc (2); one end of the rod (142) is connected with the cover (141), and the other end extends away from the recovery unit.
The medical saw disk mechanism according to claim 1, characterized in that: the recovery unit further comprises a rear housing (16), a coupling (17) and a long shaft (15); the motor (18) The coupling (17) and the long shaft (15) are arranged in the rear housing (16); the long shaft (15) is connected to the power output end of the motor (18) through the coupling (17); The end of the long shaft (15) away from the motor (18) extends into the sleeve (10); the disassembly unit includes a bevel gear set; the corresponding end of the long shaft (15) is in drive cooperation with the bevel gear set; The bevel gear set is matched with the saw disc (2) in transmission.
The medical saw disk mechanism according to claim 2, wherein the bevel gear set includes a first bevel gear (8), a second bevel gear (3) and a gear shaft (4); The gear shaft (4) is nested and matched with the rotation center of the saw disk (2) to rotate synchronously; the second bevel gear (3) is sleeved on the gear shaft (4); the first bevel gear (8) ) And the second bevel gear (3) are interlocked and arranged; the corresponding end of the long shaft (15) is connected with the rotation center of the first bevel gear (8).
The medical saw disk mechanism according to claim 3, characterized in that: the end surface of the first bevel gear (8) facing the long shaft (15) is provided with a positioning groove; the long shaft (15) Correspondingly embedded in the positioning groove.
The medical saw disk mechanism according to claim 2, characterized in that: a deep groove ball bearing (11) is provided on the inner side of the sleeve (10) close to the rear housing (16); A shaft end retaining ring (12) and a felt ring (13) are provided on the side of the groove ball bearing (11) away from the saw disk (2).
The medical saw disk mechanism according to claim 1, characterized in that: the disassembly unit further comprises a baffle (1); the baffle (1) is connected to the cylinder (10) and the rod ( 142) The opposite side; the baffle (1) is a curved plate structure that is folded inward.
The method for using a medical saw disk mechanism according to claim 1, comprising the following steps:

Step 1: Extend the mechanism into the human body, partially insert the rod (142) of the front housing (14) into the target organ (30), and the baffle (1) is attached to the outer wall of the target organ (30);

Step two, under the guidance of the laparoscope, start the motor (18), drive the saw disc (2) to rotate, and cut the organ tissue between the saw disc (2) and the baffle (1), the baffle (1) In this process, the tissues other than the target organ (30) are protected from being cut by mistake; the cover (141) plays a role in opening up the opening of the organ and opening up space for the saw disk to work;

Step 3: After one side of the organ is cut, use the rod (142) as the center of rotation to adjust the organ area corresponding to the saw disc (2), and then cut the organ tissue in the same way, and finally divide the target organ into Several petal shapes;

Step 4: Turn off the saw disc mechanism and retract it on the tool disc. Use graspers and other instruments to clamp one end of the incision target organ, and pull them out of the body respectively;

Step 5. After the operation is completed, the disassembly unit part of the saw disc mechanism is separated and discarded in a waste box, and the recovery unit part is disinfected for next use.