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Carlos, with the collaboration of his father, has recently developed a programmable and adjustable (through the skin) valve which may prevent ventricular collapse when the pressure of the CSF is too low. [citation needed] Today, the valve is marketed under the name Codman Hakim valve, acquired by Integra LifeSciences in 2017. [5] [6] [7]
Shunts come in a variety of forms, but most of them consist of a valve housing connected to a catheter, the lower end of which is usually placed in the peritoneal cavity. The main differences between shunts are usually in the materials used to construct them, the types of valve (if any) used, and whether the valve is programmable or not. [2]
Scalp of a patient with an Ommaya reservoir. Dr. Ommaya handling his reservoir. An Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.
Each of the types of shunts listed above can be composed of a tube or catheter and various types of valves, although they can just be composed of the tubing or catheter. Below is a list of valves that are used in lumbar–peritoneal shunts (LP shunts) and Cerebral shunts (for a more detailed list of the types of valves see type of valves): Delta
DePuy Synthes (/ d ə ˈ p j uː /) is a franchise of orthopaedic and neurosurgery companies.Acquired by Johnson & Johnson in 1998, its companies form part of the Johnson & Johnson MedTech business segment.
Ernest Amory Codman, M.D., (December 30, 1869 – November 23, 1940) [1] was an American surgeon who made contributions to anaesthesiology, radiology, duodenal ulcer surgery, orthopaedic oncology, shoulder surgery, and the study of medical outcomes. [2] Codman was born in Boston Massachusetts.
The Wade-Dahl-Till (WDT) valve is a cerebral shunt developed in 1962 by hydraulic engineer Stanley Wade, author Roald Dahl, and neurosurgeon Kenneth Till. [1] [2] In 1960, Dahl's son Theo developed hydrocephalus after being struck by a taxicab. A standard Holter shunt was installed to drain excess fluid from his brain.
Diagram demonstrating surgical placement of a VP shunt used to manage NPH. For suspected cases of NPH, CSF shunting is the first-line treatment. The most common type used to treat NPH is ventriculoperitoneal (VP) shunts, which drain CSF fluid to the peritoneal cavity. Adjustable valves allow fine-tuning of CSF drainage.