CN-121987395-A - Branching sheath and delivery system

CN121987395ACN 121987395 ACN121987395 ACN 121987395ACN-121987395-A

Abstract

The application relates to a branch sheath and a conveying system, wherein a covered sleeve is connected with a control frame body, a sleeve inner cavity is formed in the covered sleeve, a proximal end of the covered sleeve is provided with a proximal end pipe orifice communicated with the sleeve inner cavity, a distal end pipe orifice communicated with the sleeve inner cavity is formed in the distal end of the covered sleeve, the sleeve inner cavity of the covered sleeve is used for accommodating an adaptive branch bracket, a constraint structure is connected with the control frame body, and the constraint structure is used for connecting the covered sleeve with an adaptive main body bracket. When the branch bracket moves along with the main body bracket in a plurality of directions such as up, down, left and right, the branch bracket can move along with the film covering sleeve, the film covering sleeve can synchronously move along with the binding structure, and the film covering sleeve is always and firmly wrapped around the branch bracket all the time due to the connection of the film covering sleeve and the main body bracket, so that the film covering sleeve is not easy to deviate from the branch bracket, and the protection of the branch bracket and the accurate alignment of branches are realized.

Inventors

ZHANG JUNLI
ZHAO MINGJIE
ZHU YONGFENG
TU CHUNLIN

Assignees

上海微创心脉医疗科技(集团)股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. A branching sheath, the branching sheath comprising: Controlling the frame body; The control device comprises a control frame body, a film covering sleeve, a control frame body and a control frame body, wherein the film covering sleeve is connected with the control frame body, a sleeve inner cavity is formed in the film covering sleeve, a proximal end pipe orifice communicated with the sleeve inner cavity is formed in the proximal end of the film covering sleeve, a distal end pipe orifice communicated with the sleeve inner cavity is formed in the distal end of the film covering sleeve, and the sleeve inner cavity of the film covering sleeve is used for accommodating an adaptive branch bracket; the restraint structure is connected with the control frame body and is used for connecting the tectorial membrane sleeve with the main body support of adaptation.
2. The branching sheath of claim 1, wherein the distal frame portion of the control frame is disposed through the proximal nozzle of the graft sleeve in the sleeve lumen of the graft sleeve, and the constraining structure is connected to the distal frame portion of the control frame in the sleeve lumen of the graft sleeve.
3. The branching sheath of claim 2, wherein said control housing comprises: The catheter comprises a fixed catheter, a catheter body and a catheter body, wherein the fixed catheter is provided with a catheter inner cavity and a proximal pipe orifice and a distal pipe orifice which are communicated with the catheter inner cavity, and a distal pipe section of the fixed catheter passes through the proximal pipe orifice of the film covering sleeve and is arranged in the sleeve inner cavity of the film covering sleeve in a penetrating way; The traction wire is arranged in the catheter cavity of the fixed catheter in a penetrating way; The constraining structure is connected to at least one of the distal tube segment of the fixed catheter and the traction wire in a cannula lumen of the covered cannula.
4. The branching sheath of claim 3, wherein said control housing further comprises: A limiting component, which is positioned at the distal end of the fixed catheter, the distal end of the traction wire is connected with at least one of the fixed catheter and the limiting component, the limiting component is positioned in the inner cavity of the covered sleeve and used for limiting the separation of the fixed catheter and the covered sleeve, and/or, A first switching element connected to the fixed conduit, the constraining structure being indirectly connected to the fixed conduit through the first switching element, and/or, The second switching element is connected with the tectorial membrane sleeve, and the fixed catheter is indirectly connected with the tectorial membrane sleeve through the second switching element.
5. The branching sheath of claim 4, wherein there is a first axial spacing between the distal end of the first adapter element and the distal end of the fixed catheter in the axial direction of the fixed catheter, and/or, A second axial spacing between the proximal end of the first adapter element and the distal end of the second adapter element in the axial direction of the fixed catheter and the graft sleeve, and/or, The first transfer element is arranged in a pipe body structure and sleeved outside the fixed conduit, and/or, The second switching element is arranged to be of a tube body structure, the second switching element is sleeved at the proximal end of the tectorial membrane sleeve, and the proximal end of the second switching element is connected with the fixed catheter.
6. The branching sheath of claim 5, wherein the second adapter element increases in diameter in a proximal to distal direction and/or, The covering film sleeve comprises at least two unit sleeve sections which are connected in sequence in the direction from the proximal end to the distal end, at least one of the unit sleeve sections gradually increases in diameter in the direction from the proximal end to the distal end, the second switching element is sleeved on the unit sleeve section positioned at the nearest end in the unit sleeve sections, and/or, The first axial spacing being greater than or equal to 5mm, and/or, The second axial spacing is greater than or equal to 2mm.
7. The branching sheath of claim 1, wherein said constraining structure comprises at least two constraining coils, a number of said constraining coils being connected to said control housing.
8. The branching sheath of claim 7, wherein at least two of said binding coils are different in coil length and/or, The far end of the tectorial membrane sleeve is provided with at least two extension connecting sections, and the extension connecting sections are provided with connecting through holes.
9. The branching sheath of claim 8, wherein the distal end of the graft sleeve has a first attachment region having a strength greater than the strength of other regions of the graft sleeve, the extended attachment section being attached to the first attachment region; And/or, the distal end of the extension connecting section is provided with a second connecting area, the strength of the second connecting area is greater than that of other areas in the extension connecting section, and the connecting through hole is formed in the second connecting area; And/or the extension connecting section and the tectorial membrane sleeve are arranged into an integrally formed structure.
10. A delivery system comprising a branching sheath according to any one of claims 1 to 9.

Description

Branching sheath and delivery system Technical Field The application relates to the technical field of medical instruments, in particular to a branch sheath and a conveying system. Background The endovascular implantation stent has become the common treatment means of aortic diseases such as aortic dissection, true and false aneurysm, aortic penetrating ulcer, etc., the treatment principle is that the stent graft is delivered to the lesion site through a delivery system and then is opened, so that the tumor body, the rupture or the dissection is isolated from blood through the opened stent graft, and the risk of death caused by rupture of the aneurysm and dilation hemorrhage of the dissection is eliminated. For the case where lesions involve branches on the arch, the treatment method involves the use of branched stent grafts, such as single-branch stents, two-branch stents, and three-branch stents. Although the branched stent graft can expand the indication to the lesion on the aortic arch, the safe implantation and accurate release of the branched stent graft are always the problems to be solved and optimized, and the accurate positioning and release of the branched stent graft also determines the success rate of the operation to a great extent. Because the anatomical features of blood vessels of different patients have differences, the parts of the branch stent entering the body are required to be aligned through adjustment, but in the process of adjusting the branch stent, a branch sheath with a protective function on the branch stent is easy to separate from the branch stent, the branch stent is prevented from being protected by the branch sheath due to separation of the branch sheath, and then a blood vessel is damaged, a limiting interlayer can be seriously caused, and if the branch stent is not bound or restrained, the outer diameter of the branch stent can be increased, the difficulty of the branch stent entering the branch blood vessel is increased, so that the branch stent is inaccurate in positioning, and even can not be imported when serious, so that the release of the branch stent fails. Disclosure of Invention In view of the foregoing, it is desirable to provide a branching sheath and delivery system that address the above-mentioned problems. The present application provides a branching sheath comprising: Controlling the frame body; The control device comprises a control frame body, a film covering sleeve, a control frame body and a control frame body, wherein the film covering sleeve is connected with the control frame body, a sleeve inner cavity is formed in the film covering sleeve, a proximal end pipe orifice communicated with the sleeve inner cavity is formed in the proximal end of the film covering sleeve, a distal end pipe orifice communicated with the sleeve inner cavity is formed in the distal end of the film covering sleeve, and the sleeve inner cavity of the film covering sleeve is used for accommodating an adaptive branch bracket; the restraint structure is connected with the control frame body and is used for connecting the tectorial membrane sleeve with the main body support of adaptation. In one embodiment, the distal frame portion of the control frame is disposed through the proximal tube orifice of the graft sleeve and into the sleeve lumen of the graft sleeve, and the restraint structure is connected to the distal frame portion of the control frame in the sleeve lumen of the graft sleeve. In one embodiment, the control frame includes: The catheter comprises a fixed catheter, a catheter body and a catheter body, wherein the fixed catheter is provided with a catheter inner cavity and a proximal pipe orifice and a distal pipe orifice which are communicated with the catheter inner cavity, and a distal pipe section of the fixed catheter passes through the proximal pipe orifice of the film covering sleeve and is arranged in the sleeve inner cavity of the film covering sleeve in a penetrating way; The traction wire is arranged in the catheter cavity of the fixed catheter in a penetrating way; The constraining structure is connected to at least one of the distal tube segment of the fixed catheter and the traction wire in a cannula lumen of the covered cannula. In one embodiment, the control frame further includes: A limiting component, which is positioned at the distal end of the fixed catheter, the distal end of the traction wire is connected with at least one of the fixed catheter and the limiting component, the limiting component is positioned in the inner cavity of the covered sleeve and used for limiting the separation of the fixed catheter and the covered sleeve, and/or, A first switching element connected to the fixed conduit, the constraining structure being indirectly connected to the fixed conduit through the first switching element, and/or, The second switching element is connected with the tectorial membrane sleeve, and the fixed catheter is indirectly connected with the