CN213100301U

CN213100301U - Three-cavity balloon catheter for HVPG (high pressure medical procedure) determination

Info

Publication number: CN213100301U
Application number: CN202021027056.3U
Authority: CN
Inventors: 陈永平; 张磊; 余昶; 李骥; 陈达之; 潘彤彤
Original assignee: First Affiliated Hospital of Wenzhou Medical University
Current assignee: First Affiliated Hospital of Wenzhou Medical University
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-05-04
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to a HVPG survey is with three chamber sacculus pipes, the pipe rear end is equipped with the entry, the pipe front end is equipped with the export, the interval is provided with three lumen in the pipe, be first lumen respectively, second lumen and third lumen, the entry is provided with threely and switches on with three lumen one-to-one respectively, the export is provided with threely, be first export respectively, second export and third export, first export is established on the preceding terminal surface of pipe and is switched on with first lumen correspondence, the second export is established on the front end lateral wall of pipe and is switched on with second lumen correspondence, the third export is established on the front end lateral wall of pipe and is switched on with third lumen correspondence, the sacculus has been installed to the pipe periphery, sacculus cladding third export sets up. The balloon catheter provided by the utility model has simple measuring process, can avoid introducing guide wires for many times, change the catheter, reduce pollution and ensure the reliability of measuring results; and the pressure measurement and the medicine injection can be simultaneously carried out, so that the device is suitable for patients who need to take medicine and observe pressure.

Description

Three-cavity balloon catheter for HVPG (high pressure medical procedure) determination

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a three-cavity balloon catheter for HVPG measurement.

Background

Portal hypertension, a group of clinical syndromes caused by elevated portal venous system pressure due to various reasons, is an important factor affecting the clinical prognosis of patients with liver cirrhosis, and the severity of the portal hypertension determines the occurrence and development of complications of liver cirrhosis (such as bleeding due to esophageal and gastric varices rupture, hydrops in the abdominal cavity, etc.).

Because of the anatomy particularity of the portal vein system, the portal vein pressure is difficult to directly measure, the wound is large, the risk is high, the intra-abdominal pressure changes and other factors can interfere the result, and the clinic is difficult to popularize. And it is relatively easy to determine the Hepatic Venous Pressure Gradient (HVPG), which is currently the best index internationally accepted to reflect portal pressure. HVPG is the difference between hepatic venous wedge pressure (WHVP) and hepatic venous free pressure (FHVP) measured via venous cannulation. The normal value of HVPG ranges from 3-5mmHg, when HVPG > 5mmHg, it is suggested that hepatic cirrhosis portal hypertension exists; HVPG more than or equal to 10mmHg is clinically significant portal hypertension, and prompts patients in the liver cirrhosis compensatory phase to have varicose veins, decompensation events and increased risk of liver cancer.

At present, the HVPG is mainly determined by a classical Seldinger method at home and abroad, and the specific process of puncture measurement is as follows: generally, the right internal jugular vein is punctured (the subclavian vein and the femoral vein can also be selected), disinfection, towel paving and local anesthesia are carried out conventionally, after the puncture is successful, a catheter sheath is arranged, and the catheter is introduced into the inferior vena cava through the right atrium by using a guide wire. Introducing the angiography catheter into hepatic vein, and performing hepatic vein angiography examination to confirm that the vein is unobstructed and has no stenosis and no shunt is found at the periphery; and introducing a guide wire, withdrawing the catheter, introducing the balloon catheter to the hepatic vein inlet through the guide wire, withdrawing the guide wire, measuring the hepatic vein free pressure (FHVVP), blocking the hepatic vein after expanding the balloon, measuring the hepatic vein wedge pressure (WHVP), and subtracting the FHVPG from the WHVP.

At present, a special balloon catheter for measuring HVPG is not available internationally, and other catheters are mainly used for replacing the special balloon catheter. And the measuring process is complicated, the guide wire needs to be introduced and the catheter needs to be replaced for many times, the pollution chance is increased, the result is influenced, and the method is not suitable for patients with simultaneous pressure measurement and medicine injection.

Disclosure of Invention

The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a three-cavity sacculus pipe for HVPG survey, which is provided with a plurality of cavities, is convenient for doctors to use, does not need to change a guide wire and a pipe for a plurality of times, and can inject medicine and observe pressure change at the same time.

The technical scheme of the utility model: a three-cavity saccule conduit for HVPG determination, the rear end of the conduit is provided with an inlet, the front end of the conduit is provided with an outlet,

three tube cavities, namely a first tube cavity, a second tube cavity and a third tube cavity, are arranged in the conduit at intervals,

the three inlets are communicated with the three tube cavities in a one-to-one correspondence way,

the three outlets are respectively a first outlet, a second outlet and a third outlet, the first outlet is arranged on the front end surface of the conduit and is correspondingly communicated with the first tube cavity, the second outlet is arranged on the side wall of the front end of the conduit and is correspondingly communicated with the second tube cavity, the third outlet is arranged on the side wall of the front end of the conduit and is correspondingly communicated with the third tube cavity,

the outer periphery of the catheter is provided with a saccule, and the saccule is coated with the third outlet.

By adopting the technical scheme, after the three-cavity balloon catheter of the utility model is inserted into a human body, firstly, a contrast agent is injected into the second lumen, hepatic vein radiography examination is carried out, the vein is confirmed to be unobstructed, free from stenosis and free from collateral branch, and the vein is selected as a pressure measuring vessel (otherwise, other hepatic veins must be replaced); then withdrawing the guide wire, sealing the second lumen, and measuring the hepatic vein free pressure (FHVP) through the first lumen; injecting air or contrast agent via the third lumen to expand the balloon to block hepatic vein blood flow sufficiently, measuring hepatic vein wedge pressure (WHVP), or injecting medicine via the second lumen to observe the influence of medicine on pressure. The determination process is simple, the guide wire can be prevented from being introduced for many times, the catheter can be replaced, the pollution chance is reduced, and the reliability of the measurement result is ensured; and the pressure measurement and the medicine injection can be simultaneously carried out, so that the device is suitable for patients who need to take medicine and observe pressure.

The utility model discloses a further setting again: the front end of the conduit is arranged in a conical shape.

By adopting the above further arrangement, the front end of the catheter can be conveniently inserted into the human body.

The utility model discloses a further setting again: the balloon is arranged in a spherical shape after being swelled and has the diameter of 0.8cm-1.6 cm.

By adopting the further arrangement, the effect of blocking hepatic vein blood flow is good; and different balloon sizes can be selected according to different patients.

The utility model discloses a further setting again: the distance between the front end surface of the saccule and the first outlet is 1cm, and the distance between the second outlet and the first outlet is 0.5 cm.

By adopting the above further arrangement, the positions of the outlets are reasonably arranged, and the outlets act independently and do not interfere with each other.

The utility model discloses a further setting again: the rear end of each tube cavity is provided with a connector.

By adopting the above further arrangement, the rear end of the first lumen is provided with a connector for connecting with a pressure gauge; the rear ends of the second and third lumens are provided with connectors for connecting the injector and the sealing tube.

The utility model discloses a further setting again: the rear end of each tube cavity is provided with a check valve.

By adopting the above further arrangement, the flow stopping valve can realize the control and regulation of the flow rate of the liquid or gas entering each tube cavity.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is an internal structural view of an embodiment of the present invention;

fig. 3 is a partially enlarged view of a portion I in fig. 2.

The catheter comprises a catheter 100, an inlet 200, an outlet 300, a lumen 400, a first lumen 410, a second lumen 420, a third lumen 430, a first outlet 310, a second outlet 320, a third outlet 330, a balloon 500, a first guide tube 411, a second guide tube 421, a third guide tube 431, a connector 600 and a check valve 700.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the description in the present invention as referring to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

As shown in figures 1-3, the utility model relates to a three-cavity balloon catheter for HVPG determination, the rear end of the conduit 100 is provided with an inlet 200, the front end of the conduit 100 is provided with an outlet 300, three lumens 400 are arranged in the catheter 100 at intervals, namely a first lumen 410, a second lumen 420 and a third lumen 430, the inlet 200 is provided with three inlets which are communicated with the three tube cavities 400 in a one-to-one correspondence, the outlet 300 is provided with three, respectively a first outlet 310, a second outlet 320 and a third outlet 330, the first outlet 310 is disposed on the front end surface of the catheter 100 and is communicated with the first lumen 410 correspondingly, the second outlet 320 is disposed on the front end side wall of the catheter 100 and is communicated with the second lumen 420 correspondingly, the third outlet 320 is disposed on the front end side wall of the catheter 100 and is communicated with the third lumen 430 correspondingly, the balloon 500 is arranged on the periphery of the catheter 100, and the balloon 500 is arranged to cover the third outlet 330; the front end of the conduit 100 is arranged in a conical shape; the balloon 500 is arranged in a spherical shape after being swelled and has a diameter of 0.8cm-1.6 cm; the distance between the front end surface of the balloon 500 and the first outlet 310 is 1cm, and the distance between the second outlet 320 and the first outlet 310 is 0.5 cm; the inlets 200 of the first, second and

third lumens

410, 420 and 430 are respectively connected with a first guide tube 411, a second guide tube 421 and a third guide tube 431, and the free ends of the first, second and

third guide tubes

411, 421 and 431 are respectively provided with a connector 600 and a flow stopping valve 700.

Specifically, the first lumen 410 is a penetration channel of a guide wire, the first lumen 410 is a main channel and is arranged in the middle, the connector 600 on the first guide tube 411 is used for connecting a pressure converter, the second lumen 420 is an injection channel of an X-ray positioning aid (contrast medium) and a medicine, the third lumen 430 is communicated with the balloon 500, and the connectors 600 on the second guide tube 421 and the third guide tube 431 are used for connecting an injector and a tube sealing.

Specifically, the balloon is made of latex material.

In particular, the catheter is visible under X-rays.

In the specific embodiment of the utility model, after the three-cavity balloon catheter of the utility model is inserted into the human body, the hepatic vein is introduced by using the guide wire, the contrast agent is injected through the second lumen 420, the vein is confirmed to be unobstructed, free from stenosis and free from collateral diversion, and then the vein is selected as the pressure measuring blood vessel; then the guide wire is withdrawn, the second lumen is sealed, the connector 600 on the first guide tube 411 is connected with the pressure transducer, and the hepatic vein free pressure (FHVP) is read; then, air or contrast agent is filled into the third lumen 430, so that the balloon 4 is expanded to fully block the hepatic vein blood flow, and the hepatic vein wedge pressure (WHVP) is read; finally, the hepatic vein free pressure (FHVP) is subtracted from the hepatic vein wedge pressure (WHVP) to obtain the Hepatic Vein Pressure Gradient (HVPG).

The medicine can also be injected through the second lumen at the same time, and the influence of the medicine on the pressure can be observed.

Specifically, the catheter and each lumen can be integrally arranged; the outer walls of the first lumen, the second lumen and the third lumen are jointed and are simultaneously coated by the catheter.

Specifically, scales are arranged on the outer wall of the catheter, so that medical personnel can conveniently identify the depth of the catheter entering the human body.

Claims

1. A three-cavity saccule conduit for HVPG determination, the rear end of the conduit is provided with an inlet, the front end of the conduit is provided with an outlet, the three-cavity saccule conduit is characterized in that,

the three inlets are respectively communicated with the three tube cavities in a one-to-one correspondence way,

2. The three-lumen balloon catheter for HVPG assay according to claim 1, wherein the catheter tip is tapered.

3. The three-lumen balloon catheter for HVPG assay according to claim 1 or 2, characterized by a balloon set spherically after inflation and having a diameter of 0.8cm to 1.6 cm.

4. The three-lumen balloon catheter for HVPG assay according to claim 3, wherein the distance from the balloon front end face to the first outlet is 1cm, and the distance from the second outlet to the first outlet is 0.5 cm.

5. The three-lumen balloon catheter for HVPG assay according to claim 1 or 2, wherein a connector is provided at the rear end of each lumen.

6. The three-lumen balloon catheter for HVPG assay according to claim 5, wherein a check valve is provided at the rear end of each lumen.