Search

CN-117159909-B - Adjustable ventricular connecting device

CN117159909BCN 117159909 BCN117159909 BCN 117159909BCN-117159909-B

Abstract

The invention discloses an adjustable ventricular connecting device which is used for installing a blood pump on the cardiac apex and comprises a cardiac apex sewing component and a blood pump connecting component, wherein the cardiac apex sewing component is used for sewing with the cardiac apex and comprises a sewing ring and an outer sewing ring with elasticity, the outer sewing ring is fixedly connected with the sewing ring and sleeved on an inlet pipe of the blood pump, an inner ring of the outer sewing ring is sealed and attached to the outer wall of the inlet pipe, the blood pump connecting component comprises an adjusting fixing ring and a fastening piece, the adjusting fixing ring is sleeved on the inlet pipe and is fixedly connected with the sewing ring, the fastening piece is used for fastening the adjusting fixing ring on the inlet pipe, and the position of the adjusting fixing ring on the inlet pipe can be adjusted by loosening the fastening piece. The heart apex suture assembly and the blood pump connecting assembly can be adjusted in positions on the inlet tube, the optimal depth of the inlet tube inserted into the ventricle can be adjusted according to the myocardial thickness of different patients, the requirements of patients with different myocardial thicknesses can be met according to different people.

Inventors

  • BI JIAJUN
  • WAN FENG
  • HU QIANG
  • WANG YONGPING
  • LIU YI

Assignees

  • 上海东心生物医疗科技有限公司

Dates

Publication Date
20260505
Application Date
20230815

Claims (7)

  1. 1. An adjustable ventricular connection device for mounting a blood pump on a cardiac apex, comprising: The heart apex suture assembly is used for being sutured with the heart apex and comprises a suture ring (1), and an outer suture ring (2) and an inner suture ring (5) which are all elastic, wherein the outer suture ring (2) is fixedly connected with the suture ring (1) and is sleeved on an inlet pipe (3) of a blood pump, and an inner ring of the outer suture ring (2) is in sealing fit with the outer wall of the inlet pipe (3); The blood pump connecting assembly comprises an adjusting fixing ring (4), a fastener and a compression ring (6), wherein the adjusting fixing ring (4) is sleeved on the inlet pipe (3) and is fixedly connected with the suture ring (1), the fastener is used for fastening the adjusting fixing ring (4) on the inlet pipe (3), and the position of the adjusting fixing ring (4) on the inlet pipe (3) can be adjusted by loosening the fastener; The sewing ring (1) comprises a sewing sheet (101) and a clamping ring (102) extending from one side of the sewing sheet (101) facing the adjusting fixing ring (4) along the axial direction, wherein the adjusting fixing ring (4) is provided with a plurality of elastic clamping claws (401) which are distributed in an annular space, the elastic clamping claws (401) are buckled on the clamping ring (102), the inner sewing ring (5) is arranged in the clamping ring (102) and the inner ring of the inner sewing ring is sealed and attached to the outer wall of the inlet pipe (3), the clamping ring (6) is fixed on the adjusting fixing ring (4) and is positioned among the elastic clamping claws (401), the sewing sheet (101) is divided into an inner ring sheet (1011) and an outer ring sheet (1012) by taking the clamping ring (102) as a dividing line, and the clamping ring (6) and the inner ring sheet (1011) are matched and tightly pressed on the inner sewing ring (5).
  2. 2. The device for connecting the ventricle of the heart of claim 1, wherein the elastic clamping jaws (401) comprise connecting portions (4011) which extend from one side of the adjusting fixing ring (4) facing the sewing ring (1) along the axial direction and clamping hook portions (4012) connected to the end portions of the connecting portions (4011), arc-shaped grooves (40111) are formed in the outer side faces of the connecting portions (4011) so that the widths of the connecting portions (4011) gradually increase from the middle to the upper ends and the lower ends, a plurality of clamping grooves (1021) which correspond to the elastic clamping jaws (401) one by one are formed in the periphery of the clamping ring (102), and the clamping hook portions (4012) are clamped in the corresponding clamping grooves (1021).
  3. 3. The adjustable ventricular connecting device of claim 1, wherein a plurality of inner stitching holes (10111) are annularly arranged on the inner ring piece (1011) at intervals, the inner stitching ring (5) is stitched on one side of the stitching piece (101) through the plurality of inner stitching holes (10111), a plurality of outer stitching holes (10121) are annularly arranged on the outer ring piece (1012) at intervals, and the outer stitching ring (2) is stitched on the other side of the stitching piece (101) through the plurality of outer stitching holes (10121).
  4. 4. The device of claim 1, wherein the ring (4) and the ring (6) each have a plurality of openings (460) around their circumference.
  5. 5. The adjustable ventricular connection device according to claim 1, wherein the adjusting fixing ring (4) is further provided with a connecting ring (402) and a hoop (403), a plurality of elastic claws (401) are uniformly connected to one side of the connecting ring (402), the hoop (403) is provided with a fixing section (4031) and an adjustable section (4032) which are both arc-shaped, the fixing section (4031) is integrally connected to the other side of the connecting ring (402), a separation hole (404) is arranged between the adjustable section (4032) and the other side of the connecting ring (402) and is not contacted with each other, one end of the adjustable section (4032) is integrally connected to one end of the fixing section (4031), a notch (4033) is arranged between the other end of the adjustable section (4032) and the other end of the fixing section (4031), the fastener is a screw (7), and the other end of the screw (4032) is connected to the other end of the fixing section (4031) so as to be large in the interior of the fixing section (4031).
  6. 6. The adjustable ventricular connection device of claim 5, wherein a through hole is formed at the other end of the adjustable section (4032), a screw hole opposite to the through hole is formed at the other end of the fixed section (4031), a washer (8) is disposed in the notch (4033), and the screw (7) is screwed into the screw hole through the through hole and the washer (8).
  7. 7. An adjustable ventricular connection device according to any one of claims 1 to 5, characterized in that the adjustment fixing ring (4) is provided with an internally threaded hole (405), the outer wall of the inlet tube (3) is provided with an external thread (301), the adjustment fixing ring (4) is screwed onto the inlet tube (3), the fastening means is a nut (9), the nut (9) is screwed onto the inlet tube (3) and locks the adjustment fixing ring (4).

Description

Adjustable ventricular connecting device Technical Field The invention relates to the technical field of medical equipment, in particular to an adjustable ventricular connecting device. Background A blood pump or a called ventricular assist device for providing mechanical support for the blood circulation of patients with refractory heart failure in the advanced stage, i.e. transitional treatment before heart transplantation or recovery of heart function and long-term treatment. The blood pump is connected with the ventricle and the aorta of the patient in a parallel bypass mode, the inlet pipe of the blood pump is inserted into the ventricle through the heart apex opening, the impeller of the blood pump is driven by the power device to work, blood enters the pump cavity from the ventricle through the inlet pipe, and the blood is discharged from the pump through the centrifugal effect of the impeller and then enters the aorta through the bridged artificial blood vessel, so that the blood circulation of the patient is supported. Because the myocardial thickness of patients often varies, in general, the apex wall thickness of patients suffering from myocardial hypertrophy is 14-35 mm, and the apex wall thickness of patients suffering from non-myocardial hypertrophy type heart failure is 7.5-13 mm, so when the blood pump is used for patients with different myocardial thicknesses, the position and depth of the insertion of the inlet tube of the blood pump into the apex are also different. If the inlet tube of the blood pump is inserted too deeply into the apex of the heart, the blood pump cannot be sufficiently flushed with blood at the inlet distal end in the heart chamber, thrombus is easily formed, and thus the life safety of a patient is influenced, and if the inlet tube is inserted too deeply into the apex of the heart, myocardial cells are caused to grow toward the inlet tube of the blood pump, so that the overflow area of the inlet tube is reduced, and the performance of the blood pump is influenced. At present, the existing ventricular connecting device is characterized in that a connecting ring is fixed on a blood pump and then is connected with a sewing ring fixed on the cardiac apex, so that the blood pump is fixed, the structure can not realize that the depth of an inlet pipe of the blood pump inserted into the cardiac apex is adjustable, and the requirements of patients with different myocardial thickness, especially myocardial hypertrophy, can not be met. Disclosure of Invention The invention aims to solve the problem of providing an adjustable ventricular connecting device so as to overcome the defect that the prior art cannot realize the adjustable depth of an inlet tube of a blood pump inserted into the apex of a heart and cannot meet the requirements of patients with different myocardial thicknesses, particularly myocardial hypertrophy. The technical scheme includes that the adjustable ventricular connecting device is used for installing a blood pump on a cardiac apex and comprises a cardiac apex suturing assembly used for suturing with the cardiac apex and a blood pump connecting assembly, wherein the cardiac apex suturing assembly comprises a suturing ring and an elastic outer suturing ring, the outer suturing ring is fixedly connected with the suturing ring and sleeved on an inlet pipe of the blood pump, an inner ring of the outer suturing ring is sealed and attached to the outer wall of the inlet pipe, the blood pump connecting assembly comprises an adjusting fixing ring and a fastening piece, the adjusting fixing ring is sleeved on the inlet pipe and fixedly connected with the suturing ring, and the fastening piece is used for fastening the adjusting fixing ring on the inlet pipe and can enable the position of the adjusting fixing ring on the inlet pipe to be adjustable by loosening the fastening piece. As a further improvement of the invention, the sewing ring comprises a sewing sheet and a clamping ring which extends from one side of the sewing sheet facing the adjusting fixing ring along the axial direction, wherein the adjusting fixing ring is provided with a plurality of elastic clamping claws which are distributed in an annular interval manner, and the elastic clamping claws are buckled on the clamping ring. As a further improvement of the invention, the elastic clamping claws comprise connecting parts which extend from one side of the adjusting and fixing ring facing the sewing ring along the axial direction and clamping hook parts which are connected with the end parts of the connecting parts, arc-shaped grooves are formed in the outer side surfaces of the connecting parts, so that the widths of the connecting parts gradually increase from the middle part to the upper end and the lower end, a plurality of clamping grooves which are in one-to-one correspondence with the elastic clamping claws are formed in the periphery of the clamping ring, and the clamping hook parts are clamped