1, the double-ended catheter can quickly open the large vein channel, which is convenient for infusion and blood transfusion rescue treatment, and can monitor the central venous pressure.
2. Intravenous infusion of hypotonic, hypertonic and irritating solutions can avoid the discomfort of patients. For patients with long-term fluid replacement and poor peripheral venous conditions, catheterization in internal jugular vein can be used, and venography or venous intervention can be used at the same time.