Clamping mechanism for dialysis tubing

A clamping mechanism for dialysis tubing comprises a clamp and a pin 4. The pin 4 has a hole 5 for the tubing to pass through. It has an enlarged central portion 2 and a narrow portion 3. The clamp also has hole 10 for the tubing to pass through. The point 1 of the pin 4 passes through recesses 11 and 12 in the clamp. When the enlarged portion 2 is positioned in recess 12, the tubing is unclamped. Should a needle attached to the tubing disconnect from a patient, the pin 4 will slide into the clamp, once the pin travels more than a certain distance, the narrow portion 3 of the pin 4 will engage recess 12, causing jaws 6 to clamp the tubing, thus stopping the blood flow, in this case the venous blood flow. The jaws 6 can be opened and the pin 4 reset by pressing arms 9. The clamp has means 8 to attach the clamp to a patient.