The invention discloses a rigidity-variable interventional medical access
catheter which comprises a
catheter body and a
handle, the
catheter body comprises a lining tube, the lining tube is sleeved with a reinforcing tube, the reinforcing tube is sleeved with a supporting tube, and the supporting tube is covered with a flexible outer
membrane layer capable of being filled and expanded; the
handle comprises a first channel communicated with an inner hole of the lining
pipe and a second channel communicated with a space between the supporting
pipe and the flexible outer film layer, when a medium is filled through the second channel, the flexible outer film layer is attached to the outer surface of the supporting
pipe, and when the medium is filled through the second channel, the flexible outer film layer is separated from the supporting pipe to form a separation space. Compared with the prior art, the separation space is formed between the outer
membrane layer and the supporting tube to form buffering, so that the outer
membrane layer has flexibility to reduce the rigidity of the catheter so as to facilitate conveying in a
blood vessel, when the outer membrane layer is attached to the outside of the supporting tube, the separation space disappears, the rigidity of the catheter is increased, and the stability of the catheter is guaranteed; instruments such as
embolism materials or supports can be accurately placed in place, and the
treatment effect is improved.