CVC catheter auxiliary switching device

The utility model relates to the field of medical instruments, in particular to an auxiliary switching device for a CVC catheter. The main body is an adapter, and the adapter comprises a first interface located at one end of the adapter, a trumpet-shaped second interface located at the other end of the adapter, and a flow rate adjusting assembly located in the middle of the adapter. An adjusting assembly is arranged on the outer pipe wall of the second connector. The adjusting assembly comprises a limiting protruding block and an adjusting ring arranged on the outer pipe wall of the second connector in a sleeving mode. The flow speed adjusting assembly comprises an upper limiting ring and a lower limiting ring. An L-shaped limiting rod is fixedly arranged on the outer wall of the upper limiting ring in the circumferential direction, a plurality of limiting blocks are fixedly arranged on the outer wall of the lower limiting ring in the circumferential direction, and the spacing between the limiting blocks is e