Dual-purpose sheath for cerebral blood perfusion and radiography in aortic arch cavity and working method thereof

Abstract

The invention relates to the technical field of medical instruments, and discloses an aortic arch intracavity cerebral blood perfusion and radiography dual-purpose sheath which comprises a sheath tube, the sheath tube is a hollow tube, the sheath tube has flexibility and fracture resistance, the two ends of the sheath tube are divided into a near end and a far end, a side hole is formed in the middle end of the sheath tube, the near end of the sheath tube is fixedly connected with a sheath connector, and the sheath connector is fixedly connected with the sheath tube. A connecting tube is led out of the side face of the sheath joint, a rubber sheet is arranged at the joint of the sheath joint, a crack is formed in the middle of the rubber sheet, the guide wire / sheath core penetrates through the crack, the position of a puncture femoral artery is guided through B ultrasound, the guide wire / sheath core and the sheath tube are matched to the right common carotid artery, then the sheath tube is placed through the guide wire / sheath core, and the far end of the sheath tube is located in the right common carotid artery. After the long guide wire / sheath core is pulled out and the short guide wire / sheath core is placed, blood flow is transferred to the carotid artery through the side hole in the middle section of the sheath tube, so that blood is supplied to the inside of the brain, the effect of relieving cerebral ischemia caused by covering the carotid artery after the stent body is released is achieved, and the surgical wound surface is small.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a dual-purpose sheath for cerebral blood perfusion and angiography in the aortic arch cavity. Background Art

[0002] Endovascular treatment of aortic arch lesions (aortic type B dissection and aortic arch aneurysm) usually uses a thoracic aortic stent graft to completely cover the arch lesion segment.

[0003] The aortic arch gives rise to three important supra-arch branch vessels, which supply blood to the upper limbs and the anterior and posterior circulation of the brain. For aortic arch lesions affecting all three branches simultaneously, a stent-assisted thoracic aorta is required to simultaneously reconstruct the supra-arch branch arteries while covering the arch lesion.

[0004] Reconstruction of supra-arch branch arteries includes pre-fenestration, in situ fenestration, and the use of modular branch stents. During fenestration, there is a period of cerebral ischemia after the main stent is released. Therefore, femoral-axillary artery extracorporeal bypass should be established before the main stent is released to maintain brain blood supply. However, extracorporeal bypass increases patient trauma.

[0005] Therefore, designing an arterial sheath that can divert blood flow in vivo can reduce surgical trauma and has important clinical significance. Summary of the Invention

[0006] The object of the present invention is to provide a dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch, comprising a sheath tube, the sheath tube being a hollow tube and having flexibility and anti-bending properties, and the two ends of the sheath tube being divided into a proximal end and a distal end;

[0008] A side hole is provided at the middle end of the sheath tube;

[0009] The proximal end of the sheath tube is fixedly connected to a sheath connector, and a connecting tube is led out from the side of the sheath connector;

[0010] A rubber sheet is provided at the joint of the sheath joint, and a crack is provided in the middle of the rubber sheet for the guide wire / sheath core to penetrate.

[0011] Preferably, the diameter of the sheath tube is 10F, and the total length of the sheath tube is 90 cm.

[0012] Preferably, the side hole is elliptical, the inner diameter of the side hole is 4*3 mm, and the number of the side holes is three or four.

[0013] Preferably, the rubber sheet is in close contact with the guide wire / sheath core, and the rubber sheet seals the insertion position of the guide wire / sheath core.

[0014] Preferably, there are two guide wires / sheath cores, and the lengths of the two guide wires / sheath cores are 95 cm and 40 cm respectively.

[0015] Preferably, a three-way valve is provided at the tail end of the connecting pipe.

[0016] Preferably, a steel mesh is provided between the side holes to support the side holes.

[0017] A method for operating a dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch comprises the following steps:

[0018] S1, puncture the femoral artery using B-ultrasound guidance;

[0019] S2: Use the guidewire / sheath core and sheath to reach the right common carotid artery, then insert the sheath over the guidewire / sheath core, with the distal end of the sheath located in the right common carotid artery;

[0020] S3: After removing the long guidewire / sheath core, insert a short guidewire / sheath core.

[0021] S4. Blood flows through the side hole in the middle of the sheath and is diverted to the carotid artery, thus supplying blood to the brain.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] First, the present invention guides the location of femoral artery puncture through B-ultrasound, uses a guide wire / sheath core and a sheath tube to match the right common carotid artery, and then inserts the sheath tube through the guide wire / sheath core. The distal end of the sheath tube is located in the right common carotid artery. After the long guide wire / sheath core is removed and a short guide wire / sheath core is inserted, the blood flow is diverted to the carotid artery through the side hole in the middle section of the sheath tube, thereby supplying blood to the brain, achieving the effect of reducing cerebral ischemia caused by covering the carotid artery after the stent body is released, and the surgical trauma surface is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the present invention entering the aortic arch cavity;

[0026] Figure 3 Schematic diagram of the long sheath core and short sheath core structure of the present invention.

[0027] Among them: 1. Connecting tube; 2. Sheath tube; 3. Side hole; 4. Sheath connector. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-3 A dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch comprises a sheath tube 2, which is a hollow tube with a diameter of 10 French and a total length of 90 cm. The sheath tube 2 has both flexibility and anti-bending properties. The two ends of the sheath tube 2 are divided into a proximal end and a distal end. Blood flows through the proximal end of the sheath tube 2 and flows into the distal end.

[0030] A side hole 3 is opened at the middle end of the sheath tube 2. The side hole 3 is oval and has an inner diameter of 4*3mm. There are three or four side holes 3. Blood flows from the abdominal aorta to the common carotid artery through the side holes 3 to supply blood to the brain. A steel mesh can be set between the side holes 3 to support the side holes 3 and maintain the supporting force of the side holes 3.

[0031] The proximal end of the sheath tube 2 is fixedly connected to a sheath connector 4. There is a rubber sheet at the joint of the sheath connector 4 with a crack in the middle. The guide wire / sheath core can enter through this crack. Since the rubber sheet is tightly attached to the guide wire / sheath core, blood is not easy to leak out.

[0032] In addition, the guide wire / sheath core is composed of two sheath cores, one long and one short;

[0033] Core length: 95cm, provides support during the insertion of the sheath 2 and prevents the tip of the sheath 2 from damaging the inner wall of the blood vessel;

[0034] Short core: 40 cm long, used to block the residual lumen in the proximal end of the sheath 2 at the side hole 3 to prevent blood from flowing into the proximal end of the sheath 2 during the diversion process;

[0035] A connecting tube 1 is led out from the side of the sheath connector 4. The tail end of the connecting tube 1 is connected to a three-way valve, through which heparin diluent can be injected to prevent blood clots from forming in the gap between the sheath tubes 2.

[0036] There is a rubber sheet at the joint of the sheath joint 4, and a crack is provided in the middle of the rubber sheet for the guide wire / sheath core to penetrate.

[0037] A method for operating a dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch comprises the following steps:

[0038] S1, puncture the femoral artery using B-ultrasound guidance;

[0039] S2, using the guidewire / sheath core and sheath tube 2 to match the right common carotid artery, then inserting the sheath tube 2 via the guidewire / sheath core, with the distal end of the sheath tube 2 located in the right common carotid artery;

[0040] S3: After removing the long guidewire / sheath core, insert a short guidewire / sheath core.

[0041] S4. Blood flow is diverted to the carotid artery through the side hole 3 in the middle section of the sheath 2, thereby supplying blood to the brain, thereby alleviating cerebral ischemia caused by the stent covering the carotid artery after release, and the surgical trauma is minimal:

[0042] This device is mainly used for two interventional surgeries, namely intracavitary cerebral blood perfusion and angiography in the aortic arch, to protect patients.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch, characterized by: The sheath tube (2) is a hollow tube and has flexibility and anti-bending properties. The two ends of the sheath tube (2) are divided into a proximal end and a distal end. A side hole (3) is provided at the middle end of the sheath tube (2); The proximal end of the sheath tube (2) is fixedly connected to a sheath connector (4), and a connecting tube (1) is led out from the side of the sheath connector (4); The sheath joint (4) is provided with a rubber sheet at its joint, with a crack in the middle thereof for the guide wire / sheath core to penetrate.

2. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 1, characterized in that: The diameter of the sheath tube (2) is 10F, and the total length of the sheath tube (2) is 90 cm.

3. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 1, characterized in that: The side hole (3) is elliptical, the inner diameter of the side hole (3) is 4*3 mm, and the number of the side holes (3) is three or four.

4. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 1, characterized in that: The rubber sheet is in close contact with the guide wire / sheath core, and the rubber sheet seals the insertion position of the guide wire / sheath core.

5. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 1, characterized in that: There are two guide wires / sheath cores, and the lengths of the two guide wires / sheath cores are 95 cm and 40 cm respectively.

6. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 1, characterized in that: A three-way valve is provided at the tail end of the connecting pipe (1).

7. The dual-purpose sheath for intraluminal cerebral blood perfusion and angiography of the aortic arch according to claim 3, characterized in that: A steel mesh is provided between the side holes (3), and the steel mesh supports the side holes (3).

8. A method for operating a dual-purpose sheath for intraluminal cerebral blood perfusion and angiography in the aortic arch, characterized by: The following steps are involved: S1, puncture the femoral artery using B-ultrasound guidance; S2, using the guidewire / sheath core and the sheath tube (2) to match to the right common carotid artery, and then inserting the sheath tube (2) via the guidewire / sheath core, with the distal end of the sheath tube (2) located in the right common carotid artery; S3: After removing the long guidewire / sheath core, insert a short guidewire / sheath core. S4. The blood flows through the side hole (3) in the middle section of the sheath (2) and is diverted to the carotid artery, thereby supplying blood to the brain.

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