CN219847579U

CN219847579U - Biliary tract drainage device after intrahepatic duct calculus excision

Info

Publication number: CN219847579U
Application number: CN202321190779.9U
Authority: CN
Inventors: 肖志亚; 蔡权; 胡军
Original assignee: Hunan Aerospace Hospital
Current assignee: Hunan Aerospace Hospital
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-10-20
Anticipated expiration: 2033-05-17

Abstract

The utility model relates to a medical appliance, in particular to a biliary tract drainage device after intrahepatic bile duct calculus removal, which comprises a negative pressure tube, wherein one end of the negative pressure tube is communicated and connected with a drainage tube, and the other end of the negative pressure tube is communicated and connected with a liquid suction end of a micropump; the micropump and the miniature motor are assembled into a whole to form a miniature pump group; the miniature pump set is fixed with the negative pressure pipe through a fixing piece; the fixing piece is also provided with a pressure control structure, the pressure control structure is communicated with the negative pressure pipe and matched with the micro motor through the switch component, so that the micro pump set is automatically turned off after the negative pressure in the negative pressure pipe exceeds a preset value. The negative pressure can be generated in the negative pressure pipe through the work of the miniature pump set, so that the drainage tube is used for sucking body fluid and broken stone in the body fluid, and compared with the conventional natural drainage, the drainage tube can generate more obvious attractive force and help the broken stone to be discharged; and the negative pressure attractive force can be well controlled by utilizing the arranged pressure control structure, so that the overlarge negative pressure attractive force is avoided.

Description

Biliary tract drainage device after intrahepatic duct calculus excision

Technical Field

The utility model relates to a medical appliance, in particular to a biliary tract drainage device after intrahepatic bile duct calculus is resected.

Background

At present, the cause of calculus of intrahepatic bile duct is not completely clear, and is mainly considered to be related to biliary tract infection (biliary tract chronic inflammation), biliary tract parasites (such as roundworms and clonorchiasis sinensis), cholestasis, biliary tract structural abnormality and the like. For example, when biliary tract is infected, bacteria secrete various enzymes to promote supersaturation of calcium bilirubinate, and the bacteria combine with other substances in bile to form stones.

The intrahepatic bile duct calculus treatment needs to select a proper treatment mode according to the pathological change degree, but generally mainly depends on surgical operation to remove the focus, remove the calculus completely, correct the biliary duct stenosis and smooth biliary tract drainage. Including removal of a portion of a patient's intrahepatic bile duct stones, drug therapy, and surgical therapy via percutaneous trans-cholangioscopic (PTCS) or Endoscopic Retrograde Cholangiopancreatography (ERCP) routes.

Wherein, the operation treatment is divided into hepatectomy, cholangiotomy, stone extraction and biliary-intestinal anastomosis.

Hepatectomy is where a physician resects diseased liver segments, bile ducts and stones together under general anesthesia via an open, laparoscopic or da vinci robotic approach. Mainly aims at the calculus which is difficult to be completely removed by pathological change of hepatic lobe or intrabiliary calculus, and the patients with difficult-to-correct biliary stricture or saccular dilatation, hepatic parenchymal atrophy fibrosis, and hepatic abscess or intrahepatic bile duct cancer.

Under general anesthesia, a doctor directly takes out stones by incising the bile duct through an abdomen opening, a laparoscope or a da vinci robot way or takes out stones by means of a choledochoscope; however, there is a certain recurrence rate after the cholangiotomy lithotomy, and some patients may need to be operated again due to the recurrence of the calculus.

Bile duct plastic biliary enteroanastomosis is to directly anastomose bile duct with intestinal tract under general anesthesia by means of an open abdomen, laparoscope or a da vinci robot, so as to smooth bile drainage.

Liver resection has obvious effect on the liver of a patient, so that a cholangiectomy stone extraction operation and a cholangioplasty biliary intestinal anastomosis operation are adopted for treatment in most cases; however, the two means are difficult to ensure that the broken stone is completely taken out, so that the treatment such as stone taking, broken stone and the like of a drainage tube sinus choledochoscope is often matched after operation, the treatment mainly aims at the treatment of residual calculus after operation, and aims at taking out the calculus and reducing the recurrence rate after operation.

The treatment of stone taking, stone breaking and the like through the drainage tube sinus choledochoscope is essentially that the endoscope is combined with drainage treatment, and during the drainage process, stone breaking flows in the tube to remove stone, and blockage can be generated at times; conventional natural drainage completely relies on internal and external pressure difference to drain, the impact force generated by natural flow of body fluid is very limited, and when broken stones slightly clip or block, drainage is interrupted.

Although some drainage techniques are carried out in a pumping mode, the impact force of body fluid flow can be enhanced through pumping energy, and further, blockage caused by slightly blocking broken stones can be overcome to a certain extent; however, the current pumping drainage technology cannot automatically control the pause of pumping according to the magnitude of the drainage negative pressure, and is difficult to master the optimal pumping pause time.

Disclosure of Invention

The utility model aims to provide a biliary tract drainage device after intrahepatic bile duct calculus removal, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the biliary tract drainage device after intrahepatic duct calculus removal comprises a negative pressure tube, wherein one end of the negative pressure tube is communicated and connected with a drainage tube, and the other end of the negative pressure tube is communicated and connected with a liquid suction end of a micropump;

the micropump and the miniature motor are assembled into a whole to form a miniature pump group; the miniature pump set is fixed with the negative pressure pipe through a fixing piece;

the fixing piece is also provided with a pressure control structure, the pressure control structure is communicated with the negative pressure pipe and matched with the micro motor through the switch component, so that the micro pump set is automatically turned off after the negative pressure in the negative pressure pipe exceeds a preset value.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: the switch assembly comprises a contact switch arranged on the fixed piece, and the contact switch is connected with the micro motor and the power supply;

the contact switch is elastically and telescopically provided with a contact, and when the contact is pressed into the contact switch under the force of the contact, the contact switch is triggered and disconnects the power supply from the micro motor.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: the pressure control structure comprises a balance pipe fixed on the fixing piece through a hoop, a sealing plug is arranged in the balance pipe in a sealing sliding manner, a control rod is fixed on one side of the sealing plug, and the control rod slides out from one end, close to the contact, of the balance pipe and points to the contact;

two rings of steps are arranged in the balance pipe, a clamping part is formed between the two rings of steps, a sealing ring is embedded on the clamping part, a flange is integrally arranged at the middle position of the control rod, and the sealing ring is in sealing sliding fit with the control rod;

a compensating cavity is formed in the balancing pipe at the part between the sealing ring and the sealing plug, and the compensating cavity is communicated with the negative pressure pipe through a guide pipe;

the control rod is also sleeved with a spring, and one end of the spring is abutted against the flange.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: the sleeve is also rotatably provided with a screw rod, the lower surface of the screw rod is provided with external threads, and the external threads are matched with internal threads on the inner wall of the sleeve;

the sleeve and the lantern ring are fixed to form a double-sleeve structure, and a section of the balance pipe, which is close to the contact, is provided with a notch for the lantern ring in the double-sleeve structure to extend into the balance pipe; the lantern ring and the control rod are in sliding sleeve joint, and the other end of the spring is in contact with the lantern ring.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: one end of the screw rod is fixed with a knob, the other end of the screw rod is in running fit with an end sleeve, and the end sleeve is sleeved and fixed with the outer wall of one end of the balance tube, which is close to the contact.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: one end of the control rod, which slides out of the balance pipe, is rotatably provided with a rubber roller, and a through hole for the guide pipe to pass through is formed in the fixing piece.

Biliary tract drainage device after intrahepatic duct calculus removal as described above: a joint is arranged at the other end of the drainage tube, and the drainage end of the micropump is communicated with a drainage bag; can be connected with the puncture needle through the joint.

Compared with the prior art, the utility model has the beneficial effects that: the negative pressure can be generated in the negative pressure pipe through the work of the miniature pump set, so that the drainage tube is used for sucking body fluid and broken stone in the body fluid, and compared with the conventional natural drainage, the drainage tube can generate more obvious attractive force and help the broken stone to be discharged; and the negative pressure attractive force can be well controlled by utilizing the arranged pressure control structure, so that the overlarge negative pressure attractive force is avoided.

The sleeve can be driven to move by rotating the lead screw, so that the lantern ring is driven to move along the axis of the control rod, and the initial compression amount of the spring is regulated; and then the impact adjustment of the negative pressure drainage can be carried out according to the pain feeling born by the patient.

Drawings

Fig. 1 is a schematic diagram of the biliary tract drainage device after intrahepatic duct calculus removal.

Fig. 2 is a schematic diagram of the biliary tract drainage device after removal of the intrahepatic bile duct stones after removal of the drainage tube and the connector.

Fig. 3 is a schematic view of the structure of fig. 2 after the negative pressure tube is further removed.

Fig. 4 is a schematic structural view of the balance tube, the screw rod and the negative pressure tube after being detached from the fixing member.

Fig. 5 is a schematic view of another orientation of fig. 4.

Fig. 6 is a schematic view of the control rod after removal from the balance tube.

Fig. 7 is a schematic diagram of the balance tube and screw after half-cut.

Fig. 8 is an enlarged view at a in fig. 7.

In the figure: 1-a negative pressure pipe; 2-micropump; 3-miniature motor; 4-a liquid absorbing end; 5-a liquid discharge end; 6-fixing piece; 7-drainage tube; 8-linker; 9-contact switch; 10-contacts; 11-balancing pipes; 12-a ferrule; 13-perforating; 14-a catheter; 15-sealing plugs; 16-a control lever; 17-flange; 18-a spring; 19-a sealing ring; 20-collar; 21-a sleeve; 22-end sleeve; 23-screw rod; 24-notch; 25-steps.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-8, as an embodiment of the present utility model, the biliary tract drainage device after intrahepatic bile duct lithiasis removal includes a negative pressure tube 1, wherein one end of the negative pressure tube 1 is connected with a drainage tube 7 in a conducting manner, and the other end of the negative pressure tube 1 is connected with a liquid suction end 4 of a micropump 2 in a conducting manner;

the micropump 2 and the micromotor 3 are assembled into a whole to form a micropump group; the miniature pump set is fixed with the negative pressure pipe 1 through a fixing piece 6;

the fixing piece 6 is also provided with a pressure control structure, the pressure control structure is communicated with the negative pressure pipe 1 and is matched with the micro motor 3 through a switch component, so that the micro pump group is automatically turned off after the negative pressure in the negative pressure pipe 1 exceeds a preset value.

In addition, the other end of the drainage tube 7 is provided with a joint 8, and the drainage end 5 of the micropump 2 is communicated with a drainage bag; can be connected with the puncture needle through the joint 8; in the utility model, the negative pressure can be generated in the negative pressure pipe 1 through the work of the arranged micro pump set, so that the drainage tube 7 is used for sucking body fluid and broken stone in the body fluid, and compared with the conventional natural drainage, the drainage tube can generate more obvious attractive force and help the broken stone to be discharged; and the negative pressure attractive force can be well controlled by utilizing the arranged pressure control structure, so that the overlarge negative pressure attractive force is avoided.

Although related micropump drainage technology is available at present, the technology does not have pressure control capability, and even pumping still occurs under the condition that body fluid is exhausted, so that related organs, blood vessels and tissues in the body are damaged.

In addition, in the process of removing the urinary calculus, if the drainage is interrupted due to the fact that larger broken stones block hoses, blood vessels, organs, bile ducts and the like, the negative pressure in the catheter of the interruption section continuously rises due to the continuous operation of the micropump, and the negative pressure attractive force is also continuously increased; when the attractive force exceeds the resistance of the broken stone blocking, the broken stone can quickly break through a hose, a blood vessel, an organ, a bile duct and the like at the blocking position, and the broken stone can have larger impulse at the moment of breaking through the blocking position, so that the broken stone is extremely easy to scratch or strike the blood vessel, the organ and the bile duct, and further the damage to a patient is caused.

As a further aspect of the present utility model, the switch assembly includes a contact switch 9 mounted on the fixing member 6, the contact switch 9 connecting the micro motor 3 and a power source;

the contact switch 9 is elastically and telescopically provided with a contact 10, and when the contact 10 is pressed into the contact switch 9 under force, the contact switch 9 is triggered and disconnects the power supply from the micro motor 3.

In contrast, in the process that the pressure born by the contact 10 gradually decreases to disappear, the contact 10 can be driven to pop up the contact switch 9 by utilizing the elastic force, so that the power supply and the micro motor 3 are switched on again.

In the technology of the utility model, if the drainage is interrupted due to larger broken stones in a hose, a blood vessel, an organ, a bile duct and the like, the pressure in the negative pressure pipe 1 is continuously increased, and the continuously increased negative pressure in the negative pressure pipe 1 controls the on-off state of the contact switch 9 through a pressure control structure; when the negative pressure in the negative pressure pipe 1 reaches a preset value, the pressure control structure presses the contact 10, so that the contact 10 is pressed into the contact switch 9 under force, and the power supply is disconnected from the micro motor 3.

As a further scheme of the utility model, the pressure control structure comprises a balance tube 11 fixed on the fixing piece 6 through a hoop 12, a sealing plug 15 is arranged in the balance tube 11 in a sealing sliding manner, a control rod 16 is fixed on one side of the sealing plug 15, and the control rod 16 slides out from one end of the balance tube 11 close to the contact 10 and points to the contact 10;

two rings of steps 25 are arranged in the balance pipe 11, a clamping part is formed between the two rings of steps 25, a sealing ring 19 is embedded in the clamping part, a flange 17 is integrally arranged at the middle position of the control rod 16, and the sealing ring 19 is in sealing sliding fit with the control rod 16;

the part between the sealing ring 19 and the sealing plug 15 forms a compensation cavity in the balance pipe 11, and the compensation cavity is communicated with the negative pressure pipe 1 through a conduit 14;

the control rod 16 is also sleeved with a spring 18, and one end of the spring 18 is abutted against the flange 17.

The end of the balance tube 11 away from the contact 10 is open to the outside atmosphere, and the outer diameter of the flange 17 is smaller than the inner diameter of the balance tube 11.

The sealing plug 15 is in sealing sliding fit with the inner wall of the balance tube 11, and the sealing ring 19 is sealed between the control rod 16 and the clamping part, so that the compensation cavity cannot be communicated with the outside; while the presence of the conduit 14 allows the compensation chamber to communicate only with the negative pressure tube 1.

When negative pressure or negative pressure increase is generated in the negative pressure pipe 1, the negative pressure or the negative pressure increase is conducted into the compensation cavity through the guide pipe 14, and the sealing ring 19 can only be close to the sealing ring 19 through the sealing plug 15 to compensate the negative pressure or the negative pressure increase because the sealing ring 19 cannot move; the control rod 16 is driven to synchronously move in the process that the sealing plug 15 approaches the sealing ring 19, and on one hand, the spring 18 is extruded to bear pressure; on the other hand, the end of the lever 16 that slides out will be closer to the contact 10.

When the negative pressure in the negative pressure pipe 1 is increased to a preset value, one end of the control rod 16, which penetrates through the balance pipe 11 in a sliding way, presses the contact 10 to press the contact 10 into the contact switch 9 under the force, and disconnects the power supply from the micro motor 3; after that, the micro pump 2 stops operating, and the negative pressure in the negative pressure pipe 1 is not increased any more.

When the negative pressure in the negative pressure pipe 1 is reduced to be lower than a preset value, the control rod 16 slides out of one end of the balance pipe 11 to be separated from the contact 10 under the action of the elastic force of the spring 18, the power supply is switched on again with the micro motor 3, and the micro pump 2 works.

As a still further scheme of the utility model, a lead screw 23 is also rotatably arranged on the sleeve 12, and the lower surface of the lead screw 23 is provided with external threads which are matched with internal threads on the inner wall of the sleeve 21;

the sleeve 21 and the sleeve ring 20 are fixed to form a double-sleeve structure, and a section of the balance tube 11, which is close to the contact 10, is provided with a notch 24 for the sleeve ring 20 in the double-sleeve structure to extend into the balance tube 11; the collar 20 is slidably engaged with the lever 16, and the other end of the spring 18 abuts the collar 20.

The sleeve 21 is driven to move by rotating the lead screw 23, and the collar 20 is driven to move along the axis of the control rod 16, so that the initial compression amount of the spring 18 is adjusted.

The aim of the arrangement is that the wounds generated in the operation are different for different patients due to different operation complexity; for patients with complicated surgery, the wound is necessarily bigger, the physical ability is weaker, and the stone-removing impact can be born less; for a simple operation patient, the body is less wounded, and the stone-removing impact can be borne more.

By way of illustration, patient a is a minimally invasive procedure and patient B is an open procedure, and it is apparent that patient a is less traumatic to the body during the procedure and patient B is more traumatic.

Accordingly, prior to use of the flow diverter provided in the present utility model, collar 20 is adjusted to the point where slot 24 is closest to contact 10 for patient B, i.e., where the initial compression of spring 18 is minimal (or spring 18 is in its natural state); in this state, when the negative pressure in the negative pressure pipe 1 may reach 50Pa, the control rod 16 may trigger the contact 10;

if the broken stone is blocked in the process of removing the broken stone, so that the negative pressure in the negative pressure pipe 1 is enhanced, under the limit state, if the broken stone is just dredged when the negative pressure is increased to 50Pa, the impact generated by the broken stone is only equal to 50Pa; that is, the impact generated in the process of removing the stones in the limit state can only reach 50Pa, and the impact of the broken stones in the process of removing the stones is relatively small.

The arrangement has the advantages that the instant impact that the blockage is dredged in the process of removing the stones can be prevented from being too large, and the pain and the injury of the stone removal impact to the body of a patient are reduced; the disadvantage is that the blockage caused by larger stones may not be overcome.

Accordingly, collar 20 may be adjusted toward seal ring 19 to increase the initial compression of spring 18 for patient a; in this state, it is possible that the control lever 16 will trigger the contact 10 when the negative pressure in the negative pressure tube 1 needs to reach 100 Pa.

The advantage of the regulated stone block is that the stone block can be dredged and overcome when the stone block is blocked relatively larger, but the defect is that the impact generated by broken stone is larger and the pain is stronger at the dredging moment.

As a still further scheme of the utility model, one end of the lead screw 23 is fixed with a knob, the other end of the lead screw 23 is in running fit with the end sleeve 22, and the end sleeve 22 is sleeved and fixed with the outer wall of one end of the balance tube 11, which is close to the contact 10.

The screw rod 23 can be driven to rotate by rotating the knob, and the end sleeve 22 is matched with the hoop 12, so that the screw rod 23 can be kept balanced better, and the probability of circumferential runout is reduced.

As a still further scheme of the utility model, a rubber roller is rotatably arranged at one end of the control rod 16, which slides out of the balance pipe 11, and a perforation 13 for the passage of a conduit 14 is arranged on the fixing piece 6.

The rubber roller is arranged to avoid static electricity from affecting the contact 10 to normally control on-off, and the perforation 13 can be a direct conduction compensation cavity of the conduit 14 and the negative pressure pipe 1.

The above-described embodiments are illustrative, not restrictive, and the technical solutions that can be implemented in other specific forms without departing from the spirit or essential characteristics of the present utility model are included in the present utility model.

Claims

1. The biliary tract drainage device after intrahepatic bile duct calculus removal is characterized by comprising a negative pressure pipe (1), wherein one end of the negative pressure pipe (1) is communicated and connected with a drainage pipe (7), and the other end of the negative pressure pipe is communicated and connected with a liquid suction end (4) of a micropump (2);

the micropump (2) and the miniature motor (3) are assembled into a whole to form a miniature pump group; the miniature pump set is fixed with the negative pressure pipe (1) through a fixing piece (6);

the fixing piece (6) is also provided with a pressure control structure, the pressure control structure is communicated with the negative pressure pipe (1) and is matched with the miniature motor (3) through a switch component, so that the miniature pump set is automatically turned off after the negative pressure in the negative pressure pipe (1) exceeds a preset value.

2. Biliary tract drainage device after intrahepatic duct stone removal according to claim 1, characterized in that said switch assembly comprises a contact switch (9) mounted on said fixed part (6), said contact switch (9) connecting said micromotor (3) and a power supply;

the contact switch (9) is elastically and telescopically provided with a contact (10), and when the contact (10) is pressed into the contact switch (9) under the force, the contact switch (9) is triggered and disconnects the power supply from the micro motor (3).

3. Biliary tract drainage device after intrahepatic bile duct stone removal according to claim 2, characterized in that the pressure-controlled structure comprises a balancing tube (11) fixed on the fixing piece (6) through a cuff (12), a sealing plug (15) is arranged in the balancing tube (11) in a sealing sliding manner, a control rod (16) is fixed on one side of the sealing plug (15), and the control rod (16) slides out from one end of the balancing tube (11) close to the contact (10) and points to the contact (10);

two rings of steps (25) are arranged in the balance pipe (11), a clamping part is formed between the two rings of steps (25), a sealing ring (19) is embedded on the clamping part, a flange (17) is integrally arranged at the middle position of the control rod (16), and the sealing ring (19) is in sealing sliding fit with the control rod (16);

a compensating cavity is formed in the balance pipe (11) at a part between the sealing ring (19) and the sealing plug (15), and the compensating cavity is communicated with the negative pressure pipe (1) through a guide pipe (14);

the control rod (16) is also sleeved with a spring (18), and one end of the spring (18) is abutted against the flange (17).

4. A biliary tract drainage device after intrahepatic bile duct stone removal according to claim 3, characterized in that a screw rod (23) is further rotatably arranged on the cuff (12), the lower surface of the screw rod (23) is provided with external threads, and the external threads are matched with internal threads on the inner wall of the sleeve (21);

the sleeve (21) and the sleeve ring (20) are fixed to form a double-sleeve structure, and a section of the balance pipe (11) close to the contact (10) is provided with a notch (24) for the sleeve ring (20) in the double-sleeve structure to extend into the balance pipe (11); the lantern ring (20) is in sliding sleeve connection with the control rod (16), and the other end of the spring (18) is in contact with the lantern ring (20).

5. The biliary tract drainage device after intrahepatic bile duct stone removal according to claim 4, wherein one end of the screw rod (23) is fixed with a knob, the other end of the screw rod (23) is in running fit with an end sleeve (22), and the end sleeve (22) is sleeved and fixed with the outer wall of one end of the balance tube (11) close to the contact (10).

6. A biliary tract drainage device after intrahepatic bile duct stone removal according to claim 3, wherein a rubber roller is rotatably arranged at one end of the control rod (16) which slides out of the balance tube (11), and a perforation (13) for a catheter (14) to pass through is arranged on the fixing piece (6).

7. The biliary tract drainage device after intrahepatic duct lithiasis excision according to any one of claims 1-6, wherein a joint (8) is installed at the other end of the drainage tube (7), and the drainage end (5) of the micropump (2) is connected with a drainage bag; can be connected with the puncture needle through the joint (8).