Abstract
A new flow-control "on-off flushing device" for lumboperitoneal shunt has been developed. This device features a simple seasaw action and click sound. It can be easily operated by manual compression of the switch without the need of any special equipment, and its on-off function is highly reliable. Our preliminary studies suggested that it was satisfactory worked in the patients without severely disturbed consciousness to prevent complications such as overdrainage as well as to treat CSF leakage. It's clinical application is continuing to be investigated.