Peripherally inserted central catheter/central venous catheter (PICC/CVC) assembly and circulating tumor cell in-vivo capture device

Abstract

The invention discloses a peripherally inserted central catheter / central venous catheter (PICC / CVC) assembly and circulating tumor cell in-vivo capture device. The device comprises a catheter and a joint; the outer wall of the catheter and the right side of the inner wall of the joint are in interference fit; the left side of the inner wall of the joint is in interference fit with a PICC; the right side of the outer wall of the PICC is provided with a fixing mechanism; the fixing mechanism includes a base; a first rubber strip is embedded in an inner cavity of the base; the PICC is inserted into an inner cavity of the first rubber strip in a connected manner; a cover plate is arranged at the top end of the right side of the base; a second rubber strip connected onto the outer wall of the PICC in a sleeving manner is embedded in an inner cavity of the cover plate; and the second rubber strip and the first rubber strip are in contact with each other. The device can prevent alcohol from corroding the PICC for fear of damage to the PICC; the fixing mechanism can fix the PICC to prevent the PICC from moving inside and outside the body of a patient, thus avoiding that in vivo capture ofcirculating tumor cells is influenced, and being conducive to therapeutic use.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a PICC / CVC assembly and an in vivo capture device for circulating tumor cells. Background technique [0002] Circulating tumor cells, referred to as CTCs, are usually referred to as circulating tumor cells that enter the peripheral blood of the human body. In 1869, the Australian doctor Ashworth first proposed the concept of circulating tumor cells. CTCs are tumor cells dissociated in the patient's blood, carrying all the genes of the tumor, and can be used as samples for genetic testing. CTC analysis can reflect the genetic status of the tumor in real time through genetic analysis of the obtained CTCs, clearly guide the patient's next drug selection, and improve the treatment effect. During treatment, the PICC / CVC assembly is usually used to run into the patient's vein to assist infusion. A PICC is a peripherally inserted central catheter and a CVC is a central cathet...

AI Technical Summary

Problems solved by technology

During maintenance, since the catheter is made of silica gel, once alcohol comes into contact with the catheter, it will easily corrode the catheter and cause damage after a long time. In addition, the tail of the catheter has no positioning function, and the catheter is easy to move inside and outside the patient's body, which will directly affect the circulation of tumor cells in the body. Capture, so a corrosion-resistant PICC catheter with positioning function is now designed

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