Clinical Analysis of Programmable Valve versus Differential Pressure Valve in Hydrocephalus

OBJECTIVE: The goal of this study is to assess the safety and efficacy of the Codman Hakim programmable valve versus differential pressure valve in the treatment of patients with hydrocephalus. METHODS: The authors conducted a retrospective study of 83 patients who were implanted the Codmam Hakim programmable valve and differential pressure valve between January 1996 and April 2001. We analyzed complications, the number of shunt revision, and prognosis between the two groups. We analyzed initial pressure setting, the cause of reprogramming, and the number of reprogramming in Codman Hakim programmable valve. RESULTS: No statistically significant difference was apparent between the Codmam Hakim programmable valve group and a differential pressure valve group in complications, primary disease entities in shunt revision cases and prognosis(p>0.05). And statistically difference was not apparent in the number of shunt revision(p=0.07). The average pressure and range of initial pressure setting in the Codmam Hakim programmable valve was 97.1mmH2O and 50~150mmH2O, respectively. The number of cases of reprogragmming in the Codmam Hakim programmable valve was 12 in total, 1 time in 9 cases , 2 times in 2 cases, and 3 times in 1case. CONCLUSION: The Codmam Hakim programmable valve can decrease shunt revision caused by underdrainage and overdrainage complications. The optimal pressure settting is the key point to decreasing reprogramming and complications in the Codmam Hakim programmable valve and a differential pressure valve.

A Case of Akinetic Mutism Caused by Volume Change of Cerebral Ventricles

Akinetic mutism is a syndrome caused by various etiologies, and characterized by silent immobility and preserved alertness. The repetitive ventriculoperitoneal shunt for the recurrent hydrocephalus can be a forerunner of that. We present a man with akinetic mutism following two times of ventriculoperitoneal shunt revision. Akinetic mutism of the patient may be caused by the damage on the ascending dopaminergic projections. Symptoms were not alleviated by the normalization of ventricular size but by a large dose of bromocriptine.

A Clinical Analysis of the Ventriculoperitoneal Shunt with Programmable Shunt Divice

CSF shunting procedures are widely employed in the treatment of hydrocephalus and other disturbances of the dynamics of CSF such as a rachnoid cyst and syrinx. The relative simplicity of this operation with respect to other neurosurgical procedures is matched by a high incidence of complications. Many kinds of shunt devices have been developed to reduce complications. Yet, this operation frequently requires surgical revision. Traditional shunts were primarily designed to manage hydrocephalus by regulating intracranial pressure. Those devices, in some circumstances, can cause to underdrain or overdrain CSF and may need a surgical revision to adjust the pressure Authors have treated 28 patients with the disturbaces of CSF dynamics using pressuread justable valve system (Codman-Medos p rogrammable Hakim valve system). Two patients had arachnoid cysts and the others had hydrocephalus with various etiologies. Subdural hygroma was developed in 5 patients and underdrainage was observed in 9 patients on CT scan. By adjusting the pressure, Authors achieved clinical improvements without a need for surgical revision. The optimum pressure was 97.4+17.4mmHO for the patients with hydrocephalus with various etiologies in adults. In conclusion, the incidence of shunt revision by using this shunt device for the treatment of hydrocephalus and arachnoid cysts was decreased.

Akinetic Mutism from Obstructive Hydrocephalus;Successful Treatment with Bromocriptine and Ephedrine

The authors report one case of akinetic mutism with obstructive hydrocephalus. The patient suffered from multiple shunt failures and shunt revision. After multiple shunt revision, the patient fell into an akinetic-mute state. She appeared awake but was no response to painful somatosensory, loud auditory or threatening visual stimuli and she required total nursing care. This behavioral syndrome was no response to shunt revision but we were able to successfully treat a case of akinetic mutism after combination theraphy of Bromocryptine and Ephedrine.