JP-2026514406-A - Intervention handles and intervention systems

JP2026514406AJP 2026514406 AJP2026514406 AJP 2026514406AJP-2026514406-A

Abstract

An interventional handle and an interventional system are disclosed. The interventional handle includes a screw shaft (10), a ball nut (20), and a drive assembly (30). The screw shaft (10) defines a through hole (12) that passes through the screw shaft (10) along its axis and is fitted for coaxial insertion of a catheter assembly (40). The screw shaft (10) is fitted to be coaxially connected to the catheter assembly (40). The ball nut (20) engages with the screw shaft (10) and is circumferentially rotatable around the screw shaft (10), with the displacement of the screw shaft (10) along the axis being restricted. The drive assembly (30) is fitted to drive the ball nut (20) to rotate the screw shaft (10) circumferentially, causing axial movement of the screw shaft (10). In this configuration, the catheter assembly (40) is coaxially inserted into the through-hole (12) of the screw shaft (10) and coaxially coupled to the screw shaft (10), so that only axial force acts on the screw shaft (10). This effectively overcomes the problems associated with conventional eccentric catheters (03). [Selection Diagram] Figure 2

Inventors

ルー，シーグイ
リン，シン
ホアン，チンチン
チェン，グオミン

Assignees

シャンハイマイクロポートカーディオフローメドテックシーオー．，エルティーディー．

Dates

Publication Date: 20260511
Application Date: 20240222
Priority Date: 20230331

Claims (10)

It comprises a screw shaft, a ball nut, and a drive assembly, The screw shaft is provided with a through hole that penetrates the screw shaft along its axis, the through hole is fitted so that the catheter assembly passes through it coaxially, and the screw shaft is fitted so that it is connected to the catheter assembly coaxially. The ball nut is fitted and connected to the screw shaft and is rotatable in its circumferential direction around the screw shaft, and the displacement of the ball nut along the axis of the screw shaft is restricted. An interventional handle, wherein the drive assembly is adapted to drive the ball nut to rotate the screw shaft in the circumferential direction, thereby driving the screw shaft to move in its axial direction.
The interventional handle according to claim 1, wherein the screw shaft has a connecting portion adapted to be coaxially connected to the catheter assembly along the axis of the screw shaft, and the joint portion to which the connecting portion connects to the catheter assembly is rotationally symmetric with respect to the axis of the screw shaft.
The interventional handle according to claim 2, wherein the connecting portion is continuous around the entire circumference of the inner wall of the through-hole and is attached to the catheter assembly along the entire outer periphery of the catheter assembly.
Further equipped with a stop assembly, The stop assembly is switchable between a locked configuration and an unlocked configuration. When the stop assembly is in the locking configuration, the axial movement distance of the screw shaft is limited to a predetermined movement distance range. The intervention handle according to claim 1, wherein when the stop assembly is in the unlock configuration, it no longer restricts the axial travel distance of the screw shaft and allows the axial travel distance of the screw shaft to exceed the predetermined travel distance range.
The stop assembly comprises a protruding member and a locking member, the protruding member protruding from the outer wall of the screw shaft, and the locking member being movable between a first position and a second position in a direction perpendicular to the axis of the screw shaft. When the locking member is in the first position, the projection of the locking member and the projection of the protruding member overlap along the axis of the screw shaft, and the stop assembly becomes a locked configuration. In the locked configuration, when the axial movement distance of the screw shaft reaches the limit of the predetermined movement distance range, the protruding member comes into contact with the locking member. The intervention handle according to claim 4, wherein when the locking member is in the second position, there is no overlap between the projection of the locking member along the axis of the screw shaft and the projection of the protruding member, and the stop assembly has the unlock configuration.
The intervention handle according to claim 5, further comprising a biasing member adapted to bias the locking member from a first position to a second position, thereby holding the locking member in the second position when not subjected to stress or restriction.
The intervention handle according to claim 5 or 6, wherein the stop assembly further comprises an operating member, the operating member being removable or movable, and the operating member being used to apply pressure to the locking member to bias the locking member from the second position to the first position.
The operating member is arranged to be movable between a third position and a fourth position along the axis of the screw shaft, and the operating member has a push/pull portion, an inclined portion and a contact portion that are sequentially joined along the axis of the screw shaft. When the operating member is in the third position, the push-pull portion coincides with the locking member in the axial direction, and the locking member is in the second position. While the operating member is moved from the third position to the fourth position, the inclined portion gradually biases the locking member from the second position to the first position. The interventional handle according to claim 7, wherein when the operating member is in the fourth position, the contact portion is aligned axially with the locking member, the contact portion contacts the locking member, and thereby holds the locking member in the first position.
The intervention handle further comprises a housing, and the operating member has a removable cover. When the cover is assembled to the housing, the cover comes into contact with the locking member, thereby holding the locking member in the first position. The intervention handle according to claim 7, wherein the locking member is in the second position when the cover is removed and separated from the housing.
The intervention handle according to any one of claims 1 to 9, An interventional system comprising: a catheter assembly inserted into the through-hole and coupled to the screw shaft.

Description

This invention relates to the field of medical devices, and more specifically, to handles and systems for interventional applications. Interventional therapy is a novel treatment technique that has emerged in recent years as a minimally invasive alternative treatment method based on cutting-edge technology. It involves inserting specialized precision instruments into the patient's body for the diagnosis and local treatment of lesions present within the body, under the guidance of medical imaging equipment. This technique offers minimal invasiveness, rapid recovery, and favorable treatment outcomes, while avoiding the potential harm that conventional surgery can pose to patients. Delivery systems used in interventional procedures generally consist of a catheter and a handle. The handle, which functions as the power source for the entire procedure, must possess sufficient safety and effectiveness. Conventional manual handles transmit power through screw fittings, while electric handles transmit power using motors, axial couplings, gears, screws, and other components. Depending on the application, the use of a delivery system with improved accuracy, ease of operation, and performance improvements such as more efficient power transmission, improved coaxiality of components involved in power transmission to the catheter, and improved catheter maneuverability may be required. Some conventional handles use a screw and nut as a power transmission mechanism, with the catheter eccentrically positioned on one side of the screw. This configuration not only occupies a large space, but the eccentric catheter generates a bending moment on the screw and nut mechanism, potentially causing the power transmission through the screw and nut to seize up, and even leading to malfunction or damage. The objective of this invention is to provide a handle and system for interventional applications that overcomes the problems associated with conventional handles arising from the use of eccentric catheters. For this purpose, the present invention provides an interventional handle comprising a screw shaft, a ball nut, and a drive assembly. The screw shaft defines a through hole that penetrates along its axis, and is fitted so that a catheter assembly is inserted coaxially into it, and the screw shaft is fitted so that it is coaxially connected to the catheter assembly. The ball nut engages with the screw shaft, is rotatable around the screw shaft, and restricts the displacement of the screw shaft along its axis. The drive assembly is adapted to drive the ball nut to rotate around the screw shaft, thereby causing axial movement of the screw shaft. Optionally, the screw shaft may have a connecting portion adapted to be coaxially connected to the catheter assembly at a joint portion that is rotationally symmetrical with respect to the axis of the screw shaft. Optionally, the connecting portion may be continuous around the entire inner wall of the through-hole, or it may be attached to the catheter assembly along the entire outer periphery of the catheter assembly. Optionally, the handle may further include a stop assembly. The stop assembly is switchable between a locked configuration and an unlocked configuration. When the stop assembly is in the lock configuration, it limits the axial movement distance of the screw shaft to a predetermined movement distance range. When the stop assembly is in the unlocked configuration, it no longer restricts the axial travel distance of the screw shaft, allowing it to exceed the predetermined travel distance range. Optionally, the stop assembly may have a protruding member and a locking member, the protruding member protruding from the outer wall of the screw shaft, and the locking member being movable between a first position and a second position in a direction perpendicular to the axis of the screw shaft. When the locking member is in the first position, the projection of the locking member and the projection of the protruding member overlap along the axis of the screw shaft, and the stop assembly becomes a locked configuration. In the locked configuration, when the axial movement distance of the screw shaft reaches the limit of the predetermined movement distance range, the protruding member comes into contact with the locking member. When the locking member is in the second position, there is no overlap between the projection of the locking member along the axis of the screw shaft and the projection of the protruding member, and the stop assembly is in the unlocked configuration. Optionally, the stop assembly may further include a biasing member adapted to bias the locking member from a first position to a second position, thereby holding the locking member in the second position when not subjected to stress or restriction. Optionally, the stop assembly may further include a removable or movable operating member for biasing the locking member from the second position to the first position. The oper