The Use Of Trocar Technique

1. Selection of blood vessels

Relatively thick, straight, elastic, rich blood flow, no venous flap, avoid joints and easy to fix blood vessels were selected. The infusion of commonly used drugs followed from the distal end of the heart, and alternated from the outside to the inside. Infusion of strong stimulation of blood vessels and resulting in decreased vascular elasticity of drugs to avoid the upper limb important veins and their branches of blood vessels, because of its strong stimulation of drugs prone to phlebitis. For patients with difficulty in venipecture, especially for patients with advanced tumors, thoracoabdominal vein puncture can be used. The thoracoabdominal vein is a peripheral small vein with slow blood flow, low pressure, low activity and difficulty in falling off or blocking the tube. In addition, femoral venipuncture can be used when it is very difficult to puncture the peripheral superficial vein when rescuing shock patients. Long-term bedridden patients should avoid the use of intravenous indwelling needles in the distal lower extremities, and the indwelling time is not easy to be too long, because the incidence of venous thrombosis in the lower extremities is higher than that in the upper extremities. .

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