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"In conclusion, TIVAP implantation via IJV or subclavian puncture by blind puncture approach is safe and feasible for the breast cancer patients during adjuvant treatment" Zhang et al (2020).
Extract:

“In conclusion, TIVAP implantation via IJV or subclavian puncture by blind puncture approach is safe and feasible for the breast cancer patients during adjuvant treatment. For those patients whose veins variate in their positions, preoperative ultrasonic marker point should be signed at puncture points. Optimal length of catheter can be confirmed before TIVAP implantation operation”.

Reference:

Zhang, P., Mo, X., Du, J. and Fan, C. (2020) Clinical application of totally implantable venous access ports for patients with breast cancer. Asian Journal of Surgery. June 8th. https://doi.org/10.1016/j.asjsur.2020.05.023. (epub ahead of print).