Atrial septal puncture kit

Abstract

The present application discloses an atrial septal puncture kit, comprising a sheath, an expansion tube and a puncture tube, wherein the expansion tube has a distal channel and a proximal channel, and the connection position of the distal channel and the proximal channel forms a step surface; a limiting sleeve is fixedly installed in the proximal channel, a threading channel is provided in the side wall of the expansion tube, a pressing protrusion is provided at the step surface, a metal wire is provided in the threading channel, and an elastic block is fixed to the metal wire; a mounting block is fixed to the puncture tube, a mounting hole is provided on the circumferential surface of the mounting block, a first pressure sensor is installed in the mounting hole, and the first pressure sensor is connected to a movable block via a spring; the end face of the mounting block close to the pressing protrusion has a mounting groove, a second pressure sensor is installed in the mounting groove; the proximal end of the metal wire has a scale line. The atrial septal puncture kit of the present application can achieve better control over the pushing of the puncture tube, thereby avoiding damage to the human body.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an atrial septal puncture kit. Background Art

[0002] Atrial septal puncture is primarily used to treat diseases associated with abnormal electrical activity in the left atrium, such as atrial fibrillation ablation. Through atrial septal puncture, a catheter is passed from the right atrium to the left atrium, facilitating treatment of lesions in the left atrium. Atrial septal puncture is a minimally invasive procedure for treating heart disease, with minimal trauma and a quick recovery. Atrial septal puncture generally includes components such as a sheath, a dilator, and a puncture tube. The dilator is generally located within the sheath, and the puncture tube is located within the dilator. Because a puncture operation is required, the patient's safety must be ensured to prevent the puncture tube from continuing to move too far into the left atrium after puncture, which may cause damage to the left atrium. Some existing atrial septal puncture kits are highly dependent on the doctor's experience when used, and the distance the puncture tube is pushed is too dependent on the doctor's experience. The atrial septal puncture kit itself lacks monitoring of the puncture tube's movement distance and timely reminders to the doctor. In addition, existing atrial septal puncture kits are difficult to adjust in a timely manner for patients of different body sizes or doctors with different operating habits. Summary of the Invention

[0003] Purpose of the invention: This application aims to overcome the defects of the prior art and provide an atrial septal puncture kit.

[0004] Technical solution: An atrial septal puncture kit comprises a sheath, an expansion tube and a puncture tube, wherein the expansion tube has a distal channel located at the distal end of the expansion tube and a proximal channel connected to the distal channel, the inner diameter of the distal channel is smaller than the inner diameter of the proximal channel, thereby forming a step surface at the connection position of the distal channel and the proximal channel; a limiting sleeve is fixedly installed in the proximal channel, the limiting sleeve has a cylindrical channel and a frustum-shaped channel connected to the cylindrical channel, the cylindrical channel is located at the distal end of the limiting sleeve, a threading channel is provided in the side wall of the expansion tube, the threading channel comprises a first channel, an arc-shaped second channel connected to the first channel, a third channel connected to the second channel, an arc-shaped fourth channel connected to the third channel and a fifth channel connected to the fourth channel, the step surface The tube has a pressing protrusion, the pressing protrusion has a connecting hole connected to the fifth channel, the threading channel has a metal wire at one end which can pass through the connecting hole, the metal wire is fixed with an elastic block which is passed through by the metal wire and abuts the side wall of the fifth channel; the puncture tube is fixed with a circular cylindrical mounting block which is passed through by the puncture tube, the circumferential surface of the mounting block has a mounting hole, a first pressure sensor is installed in the mounting hole, the first pressure sensor is connected to a movable block through a spring, and the movable block can abut the inner wall of the frustum-shaped channel and the cylindrical channel; the end face of the mounting block close to the pressing protrusion has a mounting groove, the mounting groove has a second pressure sensor, the second pressure sensor can be pressed by the end of the metal wire and can be pressed by the pressing protrusion.

[0005] Furthermore, the proximal end of the metal wire has a scale line.

[0006] Therefore, the length of the distal end of the metal wire extending out of the pressing protrusion can be well adjusted.

[0007] Furthermore, the end of the pressing protrusion is hemispherical.

[0008] Furthermore, the end of the movable block is hemispherical.

[0009] Furthermore, a bending adjustment wire is provided in the sheath tube.

[0010] This allows the sheath to be bent, thereby achieving better surgical operation.

[0011] Furthermore, the number of the threading channels and the pressing protrusions is equal and corresponds one to one; the number of the threading channels and the pressing protrusions is 2-4.

[0012] Furthermore, the elastic block is made of polymer material.

[0013] Furthermore, the number of the mounting holes is 2-4 and they are distributed in a circular shape with equal intervals; the number of the mounting grooves is 2-4 and they are distributed in a circular shape with equal intervals.

[0014] Therefore, more signals from the first pressure sensor and the second pressure sensor can be obtained, thereby enabling more comprehensive monitoring of the pushing of the puncture tube.

[0015] Furthermore, the distal end of the limiting sleeve abuts against the step surface.

[0016] Furthermore, the distal end of the expansion tube is in a frustum shape.

[0017] Beneficial effects: The atrial septal puncture kit of the present application can achieve better puncture by utilizing the cooperation of the puncture needle and the dilator. Moreover, when the puncture tube is extended from the dilator, the length of the puncture tube extending from the dilator can be well monitored.

[0018] By using the second pressure sensor and the metal wire, the maximum extension length of the puncture tube can be well monitored and reminded, thereby enabling doctors to operate better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the atrial septal puncture kit;

[0020] Figure 2 This is a schematic diagram of the first-person perspective of the atrial septal puncture kit;

[0021] Figure 3 This is an enlarged view of area A;

[0022] Figure 4 This is a schematic diagram of the second perspective of the cross-section of the atrial septal puncture kit;

[0023] Figure 5 This is an enlarged view of area B. DETAILED DESCRIPTION

[0024] Figure numerals: 1 puncture tube; 2 expansion tube; 2.1 distal channel; 2.2 proximal channel; 2.3 threading channel; 2.3.1 first channel; 2.3.2 second channel; 2.3.3 third channel; 2.3.4 fourth channel; 2.3.5 fifth channel; 2.4 pressing protrusion; 3 metal wire; 3.1 elastic block; 4 mounting block; 4.1 first pressure sensor; 4.2 spring; 4.3 movable block; 4.4 second pressure sensor; 5 limiting sleeve; 5.1 cylindrical channel; 5.2 frustum-shaped channel.

[0025] As shown in the figure, an atrial septal puncture kit includes a sheath, an expansion tube 2 and a puncture tube 1. The expansion tube 2 has a distal channel 2.1 located at the distal end of the expansion tube 2 and a proximal channel 2.2 connected to the distal channel 2.1. The inner diameter of the distal channel 2.1 is smaller than the inner diameter of the proximal channel 2.2, thereby forming a step surface at the connection position of the distal channel 2.1 and the proximal channel 2.2; a limiting sleeve 5 is fixedly installed in the proximal channel 2.2, and the limiting sleeve 5 has a cylindrical channel 5.1 and a cylindrical channel 5.2 connected to the cylindrical channel 5. .1 is connected to a frustum-shaped channel 5.2, the cylindrical channel 5.1 is located at the distal end of the limiting sleeve 5, and the side wall of the expansion tube 2 has a threading channel 2.3, which includes a first channel 2.3.1, an arcuate second channel 2.3.2 connected to the first channel 2.3.1, a third channel 2.3.3 connected to the second channel 2.3.2, an arcuate fourth channel 2.3.4 connected to the third channel 2.3.3, and a fifth channel 2. 3.5, the step surface has a pressing protrusion 2.4, the pressing protrusion 2.4 has a connecting hole connected to the fifth channel 2.3.5, the threading channel 2.3 has a metal wire 3 with one end capable of passing through the connecting hole, the metal wire 3 is fixed with an elastic block 3.1 passed by the metal wire 3 and abutting the side wall of the fifth channel 2.3.5; the puncture tube 1 is fixed with a circular cylindrical mounting block 4 passed by the puncture tube 1, the circumferential surface of the mounting block 4 has a mounting hole, and the mounting hole is installed A first pressure sensor 4.1 is connected to a movable block 4.3 via a spring 4.2. The movable block 4.3 is capable of abutting the inner side walls of the frustum-shaped channel 5.2 and the cylindrical channel 5.1. The end surface of the mounting block 4 near the pressing protrusion 2.4 has a mounting groove, and a second pressure sensor 4.4 is mounted in the mounting groove. The second pressure sensor 4.4 can be pressed by the end of the metal wire 3 and can also be pressed by the pressing protrusion 2.4. The proximal end of the metal wire 3 has a scale line.

[0026] The sheath has a bending adjustment wire. The number of the threading channels 2.3 and the pressing protrusions 2.4 is equal and corresponds to each other; the number of the threading channels 2.3 and the pressing protrusions 2.4 is 2-4. The elastic block 3.1 is made of a polymer material. The number of the mounting holes is 2-4 and they are distributed in a circular shape with equal spacing; the number of the mounting grooves is 2-4 and they are distributed in a circular shape with equal spacing. The distal end of the limit sleeve 5 abuts the step surface; the distal end of the expansion tube 2 is frustum-shaped.

[0027] As shown in the figure, during the expansion tube and puncture tube of the present application, the end of the puncture tube does not extend out of the expansion tube during the expansion tube's advancement. Because the mounting block is located at different positions within the conical channel of the conical channel when the mounting block is positioned within the stop sleeve, the measured value of the first pressure sensor varies. Therefore, the position of the mounting block within the conical channel can be determined based on the measured value of the first pressure sensor. Furthermore, after the expansion tube reaches the designated position, as the puncture tube is advanced, when the mounting block moves to the cylindrical channel, the measured value of the first pressure sensor no longer changes, indicating that the mounting block has reached the cylindrical channel. As the puncture tube is advanced, when the second pressure sensor contacts the end of the wire, the operator knows that the push limit has been reached. However, with further force, the operator can still push forward, causing the wire to move within the threading channel until the pressing bump abuts against the second pressure sensor. At this point, the puncture tube cannot be pushed any further, ensuring that the push length of the puncture tube is limited to prevent unnecessary puncture injuries. The position of the metal wire and its length beyond the connecting hole can be fine-tuned before the operation, so that it can be adjusted according to the doctor's operating habits and the patient's body shape (adjustment can be achieved by pushing or pulling the scale at the proximal end of the metal wire). The doctor can know the length that the puncture tube can be pushed between the two positions where the metal wire hits the second pressure sensor and the pressing bump hits the second pressure sensor, and can make adjustments before the operation.

[0028] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An atrial septal puncture kit, characterized in that: The invention comprises a sheath tube, an expansion tube and a puncture tube, wherein the expansion tube has a distal channel located at the distal end of the expansion tube and a proximal channel connected to the distal channel, the inner diameter of the distal channel is smaller than the inner diameter of the proximal channel, thereby forming a step surface at the connection position of the distal channel and the proximal channel; a limiting sleeve is fixedly installed in the proximal channel, the limiting sleeve has a cylindrical channel and a frustum-shaped channel connected to the cylindrical channel, the cylindrical channel is located at the distal end of the limiting sleeve, a threading channel is provided in the side wall of the expansion tube, the threading channel includes a first channel, an arc-shaped second channel connected to the first channel, a third channel connected to the second channel, an arc-shaped fourth channel connected to the third channel and a fifth channel connected to the fourth channel, the step surface has a pressing protrusion, the pressing protrusion It has a connecting hole connected to the fifth channel, and the threading channel has a metal wire at one end which can pass through the connecting hole, and the metal wire is fixed with an elastic block which is passed through by the metal wire and abuts the side wall of the fifth channel; the puncture tube is fixed with a circular cylindrical mounting block which is passed through by the puncture tube, and the circumferential surface of the mounting block has a mounting hole, and a first pressure sensor is installed in the mounting hole, and the first pressure sensor is connected to a movable block through a spring, and the movable block can abut the inner wall of the frustum-shaped channel and the cylindrical channel; the end face of the mounting block close to the pressing protrusion has a mounting groove, and the second pressure sensor is installed in the mounting groove, and the second pressure sensor can be pressed by the end of the metal wire and can be pressed by the pressing protrusion; the proximal end of the metal wire has a scale line.

2. The atrial septal puncture kit according to claim 1, characterized in that: A bending adjustment wire is arranged in the sheath tube.

3. The atrial septal puncture kit according to claim 1, characterized in that: The number of the threading channels and the pressing protrusions is equal and corresponds one to one; the number of the threading channels and the pressing protrusions is 2-4.

4. The atrial septal puncture kit according to claim 1, characterized in that: The elastic block is made of polymer material.

5. The atrial septal puncture kit according to claim 1, characterized in that: The number of the mounting holes is 2-4 and they are distributed in a circular shape with equal spacing; the number of the mounting grooves is 2-4 and they are distributed in a circular shape with equal spacing.

6. The atrial septal puncture kit according to claim 1, characterized in that: The distal end of the limiting sleeve abuts against the step surface; the distal end of the expansion tube is in a frustum shape.

Images