Cerebral arteriovenous malformation interventional embolization postoperation detaining tube cutoff device

Abstract

The invention discloses a cerebral arteriovenous malformation interventional embolization postoperation detaining tube cutoff device. The head end of a body is provided with a bent cavity, the bent cavity is through, a cutoff face is arranged at the head end, close to the body, of the bent portion, and a knife outlet is formed in the relative position of the cutoff face; a tool bit enters and exits from the knife outlet, the tool bit is fixed to a sliding piece, the sliding piece is fixed to a spring and slides inside the body, the other end of the spring is fixed to a fixed piece, and the fixed piece is fixed to the interior of the body; one end of a first pull wire penetrates through the spring and is fixed to the sliding piece, the other end is fixed to a pull ring, when the first pullwire is pulled, the spring is retracted, the tool bit is retracted back into the knife outlet, when the first pull wire is loosened, the spring is popped open, and the tool bit stretches out from theknife outlet. The cutoff device is small in size, can go deep into the focus and can effectively cut off a detaining tube, the length of the detaining tube is small, operation is easy and convenient,and the operation time is shortened.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a cutting device with a small size, capable of penetrating into the lesion, effective cutting, short length of the tube, easy to operate, and shortening operation time. Background technique [0002] Cerebral arteriovenous malformation is a congenital variant of focal cerebral angiogenesis. The absence of capillaries between cerebral arteries and cerebral veins in the diseased area leads to direct communication between arteries and veins, forming a short circuit between arteries and veins, resulting in a series of cerebral hemodynamic disorders. Clinically, it often manifests as repeated intracranial hemorrhage, partial or generalized seizures, transient ischemic attack, and progressive neurological dysfunction, and is also the second cause of intracranial spontaneous subarachnoid hemorrhage. [0003] Cerebral vascular malformation has no drug treatment for the lesion a...

AI Technical Summary

Problems solved by technology

Among them, the advantage of surgical resection is that it is possible to completely remove the lesion at one time, but the disadvantage is that the trauma of the craniotomy may damage the brain tissue around the deformity during the resection, resulting in functional damage, and the operation may cause massive bleeding; The rupture risk structure (such as concurrent aneurysm) in the embolism malformation can reduce the blood flow to improve the safety of subsequent resection, and can also reduce the volume after embolization to facilitate subsequent stereotactic radiotherapy. The disadvantage is that only some Patients can radically cure the disease through simple interventional embolization; the advantage of stereotactic radiotherapy is that it is more minimally invasive, but the disadvantage is that this treatment cannot eliminate the lesion immediately, and it often takes 2-3 years or even longer to disappear slowly (in this case may still bleed for a while), in addition, a small number of patients may not be effective, generally not suitable for larger vascular malformations with a diameter of more than 3 cm

[0004] Microcatheter glue embolization is an important method for the treatment of cerebral arteriovenous malformations, but there is a risk of glue reflux sticking to the tip of the microcatheter. In this case, most people choose to leave the microcatheter in the body, but there are risks of infection and vascular embolism. , the risk of cerebral infarction; there are also a small number of people who consider surgical methods to remove the microcatheter under direct vision during the operation, but the trauma is large, the amount of bleeding is large, and it is not suitable for deep lesions

Images