Controllable cerebral blood flow adjusting device for cerebral blood flow reconstruction operation

Abstract

The invention provides a controllable cerebral blood flow adjusting device for cerebral blood flow reconstruction surgery, and relates to the technical field of medical instruments, the controllable cerebral blood flow adjusting device comprises a connecting elastic piece, and the two ends of the connecting elastic piece are connected with clamping pieces; the clamping piece is of an arc-shaped plate structure, and a traction piece is mounted at the bottom of the clamping piece; the connecting elastic piece, the clamping piece and the traction piece are made of polylactic acid-glycolic acid copolymer. When the device is used, under the assistance of ultrasonic waves, a traction sheet is used on a blood vessel to set proper clamping force so as to artificially cause blood vessel constriction, the inner-layer clamping sheet with different polylactic acid-glycolic acid copolymer proportions is used, the degradation speed of the whole device can be controlled and adjusted, then along with ordered degradation of the device, the clamping force on the blood vessel is gradually reduced, and the blood vessel constriction effect is improved. The constriction degree of the blood vessel is gradually reduced, and the blood vessel is finally recovered to a normal blood vessel diameter, so that the problems of headache, dizziness and other discomfort of a patient caused by intracranial blood flow over-perfusion are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a controllable cerebral blood flow regulating device for cerebral blood flow reconstruction surgery. BACKGROUND

[0002] Cerebral blood flow reconstruction surgery refers to reconstructing the blood supply path of the brain through surgical operation, which is a common means to improve cerebral ischemia in the treatment of ischemic cerebrovascular disease, and is also used to deal with complex cerebrovascular lesions. In the traditional surgical plan, once the operation is completed, the blood flow cannot be adjusted, and there may be a condition that the cerebral blood flow is too much and the intracranial blood vessels cannot adapt, leading to headache, blurred vision, limb movement disorder, and even cerebral hemorrhage, which is clinically referred to as hyperperfusion phenomenon.

[0003] Due to the fact that the blood flow cannot be adjusted after the operation is completed, the cerebral blood flow is often too much and the intracranial blood vessels cannot adapt, thereby causing headache, blurred vision, limb movement disorder, and even cerebral hemorrhage, and how to design a device that can gradually adjust the cerebral blood flow within a predetermined time to effectively reduce the occurrence of hyperperfusion phenomenon. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a controllable cerebral blood flow regulating device for cerebral blood flow reconstruction surgery to solve the problems mentioned in the background.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme: The present application is a controllable cerebral blood flow regulating device for cerebral blood flow reconstruction surgery, specifically comprising: a connecting spring piece, which is an arc structure, and the two ends of the connecting spring piece are connected with clamping pieces; the clamping piece is an arc plate structure, and the bottom of the clamping piece is installed with a traction piece; the connecting spring piece, the clamping piece and the traction piece are made of polylactic acid-glycolic acid copolymer.

[0006] Further, a threaded hole is formed in the side surface of the traction piece; a contact layer is installed on the inner side of the clamping piece, wherein the contact layer is an arc structure, and the contact layer is made of polylactic acid-glycolic acid copolymer.

[0007] Further, an adjusting threaded rod is rotatably installed in the interior of the threaded hole; a hollow inner cavity is formed in the interior of the adjusting threaded rod, and the adjusting threaded rod is made of polylactic acid-glycolic acid copolymer.

[0008] Further, the degradation rate of the contact layer is greater than the degradation rate of the clamping piece and the traction piece, and the degradation rate of the adjusting threaded rod is greater than the degradation rate of the connecting spring piece.

[0009] The present application provides a controllable cerebral blood flow regulating device for cerebral blood flow reconstruction surgery, which has the following beneficial effects: In use, the clamping piece drives the contact layer to be clamped on the outside of the blood vessel accurately, the traction piece drives the contact layer on the inside of the clamping piece to clamp the blood vessel by rotating the adjusting screw rod, different thicknesses of blood vessels are adapted, the diameter of the blood vessel, the blood flow velocity and the blood flow volume are monitored in real time under the assistance of ultrasound to achieve the best narrowing effect.

[0010] Since the device is not removed after the first operation implantation, the device is made of polylactic acid-glycolic acid copolymer, has the characteristics of non-toxic and degradable, and the inner layer holding piece with different polylactic acid-glycolic acid copolymer proportions is used to achieve controllable adjustment of the degradation speed of the overall device, so as to slowly adjust the diameter of the blood vessel, so as to achieve controllable adjustment of the cerebral blood flow within a certain time, reduce the risk of hyperperfusion, and reduce the occurrence of hyperperfusion-related adverse events. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0012] The drawings described in the following description only relate to some embodiments of the present application, and are not a limitation of the present application.

[0013] In the drawings: Figure 1 A schematic view showing the overall structure of the present application is shown; Figure 2 A main view structure schematic diagram of the connecting spring of the present application is shown; Figure 3 A side view structure schematic diagram of the clamping piece of the present application is shown; Figure 4 An exploded structure schematic diagram of the present application is shown; Figure 5 A bottom perspective structure schematic diagram of the contact layer of the present application is shown; Figure 6 A cross-sectional view structure schematic diagram of the clamping piece of the present application is shown; Figure 7 A cross-sectional view structure schematic diagram of the adjusting screw rod of the present application is shown; LIST OF REFERENCE NUMERALS 1, connecting spring; 101, clamping piece; 102, traction piece; 103, threaded hole; 104, contact layer; 105, adjusting screw rod; 106, hollow inner cavity. DETAILED DESCRIPTION

[0014] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0015] Reference is made to Figures 1 to 7 Embodiment one: the present application provides a controllable cerebral blood flow adjusting device for cerebral blood flow reconstruction surgery, comprising: a connecting spring 1, the connecting spring 1 is an arc structure, and the two ends of the connecting spring 1 are connected with clamping pieces 101; the clamping piece 101 is an arc plate structure, and the bottom of the clamping piece 101 is installed with a traction piece 102; the connecting spring 1, the clamping piece 101 and the traction piece 102 are made of polylactic acid-glycolic acid copolymer; a threaded hole 103 is formed in the side of the traction piece 102; a contact layer 104 is installed on the inner side of the clamping piece 101, wherein the contact layer 104 is an arc structure, and the contact layer 104 is made of polylactic acid-glycolic acid copolymer; an adjusting threaded rod 105 is rotatably installed in the inside of the threaded hole 103; a hollow inner cavity 106 is formed in the inside of the adjusting threaded rod 105, the adjusting threaded rod 105 is made of polylactic acid-glycolic acid copolymer, the degradation rate of the polylactic acid-glycolic acid copolymer can be accurately controlled by adjusting the proportion of polyglycolic acid and polylactic acid, the polylactic acid-glycolic acid copolymer with high polyglycolic acid proportion degrades fast, and the polylactic acid-glycolic acid copolymer with high polylactic acid proportion degrades slowly, the degradation rates of various structures are adjusted by adjusting the proportion of polyglycolic acid and polylactic acid in the polylactic acid-glycolic acid copolymer, the proportion of high polyglycolic acid in the contact layer 104 is the largest, the proportion of high polyglycolic acid in the clamping piece 101 and the traction piece 102 and the adjusting threaded rod 105 is the second, and the proportion of high polyglycolic acid in the connecting spring 1 is the smallest, so according to the degradation rate ranking, the contact layer 104 is greater than the clamping piece 101 and the traction piece 102 and the adjusting threaded rod 105 is greater than the connecting spring 1, the connecting spring 1 degrades slowly, and the elastic characteristics are considered, different proportions of polylactic acid-glycolic acid copolymer materials can be used to make the connecting spring 1, the clamping piece 101, the traction piece 102, the contact layer 104 and the adjusting threaded rod 105, so as to achieve the purpose of controllable degradation rate and adjust the time of restoring the normal diameter of the blood vessel.

[0016] ​In the brain blood flow reconstruction surgery, under the assistance of ultrasound, the two ends of the connecting sheet 1 drive the connected clamping sheet 101 to expand, the clamping sheet 101 drives the inner contact layer 104 to clamp on the outside of the blood vessel, the adjusting screw rod 105 is rotated in the inside of the screw hole 103 on the side of the traction sheet 102, the adjusting screw rod 105 is rotated to tighten the two traction sheets 102, and then the clamping sheet 101 is driven to clamp the contact layer 104 on the blood vessel, since the whole brain blood flow adjusting device is made of polylactic acid-glycolic acid copolymer, the proportion of polyglycolic acid and polylactic acid in the polylactic acid-glycolic acid copolymer is adjusted according to the characteristics of different structures, so that the contact layer 104 degrades first, and other structures degrade in turn, the degradation time of different structures is different, the degree of narrowing of the blood vessel is gradually reduced, and finally the normal blood vessel diameter is reached, so as to gradually adjust the blood flow, reduce the problem that the blood flow is caused to flow a large amount due to the direct reduction of the clamping on the blood vessel, the hollow cavity 106 is arranged in the inside of the adjusting screw rod 105, the weight of the adjusting screw rod 105 is reduced, and the problem that a large amount of time is paid for the degradation of the solid adjusting screw rod 105 is prevented, the device has simple structure, the material is degradable material, and is harmless to the human body.

[0017] The working principle of the embodiment is as follows: after the two clamping sheets 101 expand, the clamping sheet 101 drives the inner contact layer 104 to clamp on the outside of the blood vessel, the adjusting screw rod 105 is rotated in the inside of the screw hole 103 on the side of the traction sheet 102, the adjusting screw rod 105 tightens the two traction sheets 102, and then the clamping sheet 101 is driven to clamp the contact layer 104 on the blood vessel, with the passage of time, the contact layer 104 and the clamping sheet 101 gradually degrade, and the degree of narrowing of the blood vessel is gradually reduced, and finally the normal blood vessel diameter is reached.

[0018] In this paper, the following points need attention: 1. The drawings of the embodiment of the application only relate to the structures involved in the embodiment of the application, and other structures can refer to the general design.

[0019] 2. In the case of no conflict, the embodiments of the application and the features in the embodiments can be combined to obtain new embodiments.

[0020] The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A controllable cerebral blood flow modulation device for cerebral blood flow reconstruction surgery, characterized in that, include: A connecting spring (1) is provided, and clamping plates (101) are connected to both ends of the connecting spring (1); the clamping plate (101) is an arc-shaped plate structure, and a traction plate (102) is installed at the bottom of the clamping plate (101).

2. The controllable cerebral blood flow regulation device for cerebral blood flow reconstruction surgery according to claim 1, characterized in that, The traction plate (102) has a threaded hole (103) on its side; a contact layer (104) is installed on the inner side of the clamping plate (101); and an adjusting threaded rod (105) is rotatably installed inside the threaded hole (103).

3. A controllable cerebral blood flow regulation device for cerebral blood flow reconstruction surgery according to claim 2, characterized in that, The adjusting threaded rod (105) has a hollow inner cavity (106) inside; the connecting spring (1), clamping plate (101), traction plate (102), contact layer (104) and adjusting threaded rod (105) are all made of polylactic acid-hydroxyacetic acid copolymer.

4. A controllable cerebral blood flow regulation device for cerebral blood flow reconstruction surgery according to claim 3, characterized in that, The degradation rate of the contact layer (104) is greater than that of the clamping piece (101), the traction piece (102), and the adjusting threaded rod (105), which is greater than that of the connecting spring piece (1).

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