Anticoagulation coating guide sheath

Abstract

The invention discloses an anticoagulation coating guide sheath, which comprises a guide sheath body and an expander catheter which are coaxially arranged. A hydrophilic coating is arranged on the outer surface of the expander catheter; the guide sheath comprises a sheath tube and a sheath seat; a side hole is formed in the sheath head; an anticoagulation coating is arranged on the outer surface of the sheathing tube; a three-way cavity, a first hemostasis device, a second hemostasis device, a guide assembly and a connector assembly are sequentially arranged in the sheath seat from head to tail. The first hemostasis device is made of elastic materials and provided with a first channel which is gradually increased, a blood groove is formed in the head end of the second hemostasis device, asecond channel is formed in the center of the tail end of the second hemostasis device, the tail of the blood groove communicates with the second channel, a guide groove is formed in the tail end of the guide assembly, and a plurality of first reinforcing ribs are arranged on the side wall of the guide groove in the circumferential direction. The blood outflow can be reduced, the entered expandercatheter or other instruments are fixed and centered, the blood coagulation risk is reduced, the cavitation is reduced, and the retention time is prolonged.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an anticoagulation coated guide sheath. Background technique [0002] Long-term vascular access is a commonly used medical procedure in medical settings, including dialysis, chemotherapy, or the use of ventricular assist devices in patients on frequent dialysis therapy. Different devices and different methods are used depending on the patient. Often long-term vascular access is established in patients requiring ventricular assist devices through open thoracotomy or direct vascular access. [0003] In recent years, it has become a hotspot to establish vascular access through minimally invasive ways to enter the cardiovascular system from peripheral blood vessels and avoid trauma caused by thoracotomy. The trend to use peripheral rather than central cardiovascular vessels has grown with the development of a variety of specific devices and tools designed for peripheral use. Whi...

AI Technical Summary

Problems solved by technology

As a blood contact dilator catheter or other devices, the introducer sheath may cause acute coagulation and thrombus in the body due to the stimulation of blood coagulation reaction when in contact with blood, which may lead to adverse events, but the existing introducer sheaths have not considered Anticoagulant properties of dilator catheters or other devices, only consider taking anticoagulant drugs when dilator catheters or other devices are implanted, but the injection of anticoagulant drugs will affect the blood coagulation mechanism of the whole body, and may also lead to the disorder of the body's blood coagulation mechanism , there is a certain risk

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