Early postoperative lumbar catheter severing in a lumboperitoneal shunt due to bite-off by the spinous processes following a fall on the buttocks: illustrative case.

Background: Rupture of the lumbar catheter in lumboperitoneal (LP) shunts is rare and typically occurs due to long-term mechanical stress. The authors describe an unusual case of early postoperative lumbar catheter severing after a fall on the buttocks.

Observations: A 78-year-old woman underwent LP shunt placement for communicating hydrocephalus after aneurysmal subarachnoid hemorrhage.

Hemifacial Spasm Caused by Compression of a Vertebral Artery Aneurysm Consequently Improved by Stent-assisted Coil Embolization.

Objective: We described a rare hemifacial spasm (HFS) caused by compression of a vertebral artery (VA) aneurysm that was consequently improved by stent-assisted coil embolization.

Case Presentation: A 60-year-old man presented with a chief complaint of left HFS that had persisted for 1 month. It had initially appeared in the orbicularis oculi, spread to the orbicularis oris, and severely disrupted his quality of life.

Comparison of Time-of-Flight-Magnetic Resonance Angiography From Silent Scan Magnetic Resonance Angiography in Depiction of Arteriovenous Malformation of the Brain.

Objective: Silent magnetic resonance angiography (MRA) was compared with time-of-flight (TOF)-MRA in imaging of arteriovenous malformations (AVMs) of the brain.

Methods: Thirty-five consecutive patients with AVMs of the brain were included. Quantitative analyses were performed by measuring both signal-to-noise ratio and contrast-to-noise ratio of the nidus.

Comparison of Rates of Growth between Unruptured and Ruptured Aneurysms Using Magnetic Resonance Angiography.

Background And Purpose: Growth is a key risk factor for rupture of unruptured cerebral aneurysms. There are few reports of investigations into the actual growth of ruptured intracranial aneurysms. The aim of the present study was to ascertain the risk of rupture of aneurysms based on the growth of unruptured and ruptured aneurysms.

[Postoperative patterns of improvement of symptoms and degrees of satisfaction in families of patients after operations for definite idiopathic normal pressure hydrocephalus: a long-term follow-up study].

Purpose: To clarify the patterns of improvement of pre- and post-operative symptoms and family satisfaction in patients with definite idiopathic normal pressure hydrocephalus (iNPN) who responded well to shunt intervention.

Subjects And Methods: The subjects included 40 patients definitively diagnosed with iNPH and who were followed up for one year or longer (age, 61-85; male-to-female ratio, 18: 22). The study focused on (1) preoperative clinical symptoms, (2) improvements in symptoms at 1, 3, 5, and 12 months after surgery, and the satisfaction of the families based on medical results of the Zarit caregiver burden interview, and infomation through questionnaires to medical personnel.

Pathophysiology of cerebral circulatory disorders in idiopathic normal pressure hydrocephalus.

This study was conducted to elucidate the pathologic conditions of cerebral circulatory disorders in idiopathic normal pressure hydrocephalus (iNPH). Among 44 possible iNPH patients, 40 patients underwent shunt surgery based on diagnostic flow charts plotted by the Southern Tohoku method and were evaluated to be shunt-effective at the end of the first post-surgical month. The cerebral blood flow (CBF) was measured by N-isopropyl-((123)I)-P-iodo-amphetamine single photon emission computed tomography (mean, mCBF; cortical region, cCBF; thalamus-basal ganglia region, tbCBF on autoradiography [ARG] method) and the perfusion patterns of the cerebral cortex were measured based on three-dimensional stereotactic surface projection (3D-SSP) Z-score images, before and 1 month after the surgery in all 40 subjects.

Experimental model of intracranial arteriovenous shunting in the acute stage.

A model of intracranial arteriovenous (AV) shunting must incorporate local hypoperfusion and simulate the hemodynamics of arteriovenous malformations. In this study, the hemodynamics of an intracranial AV shunt model in the acute stage were clarified. End-to-side anastomoses with a femoral vein graft were performed between a cortical branch of the middle cerebral artery (MCA) and the superior sagittal sinus in anesthetized dogs.

[Reinvestigation of CSF outflow resistance value in idiopathic normal pressure hydrocephalus--comparing epidural pressure monitoring with lumbar subarachnoid cerebrospinal fluid pressure monitoring].

Purpose: To compare the cerebrospinal fluid (CSF) outflow resistance values (Ro) with epidural pressure (EDP) monitoring and lumbar subarachnoid CSF pressure (L-CSFP) monitoring.

Subjects And Methods: The subjects were 14 patients with possible iNPH (age: 59-74 years old, ratio of male and female 8:6). All the patients were subjected to an infusion test by a single bolus injection method (1 ml/sec.

[Significance of shunt efficacy decision of SPECT on idiopathic normal pressure hydrocephalus].

Purpose: The purpose of this study was to investigate the significance of the shunt-effect evaluation of SPECT in idiopathic normal pressure hydrocephalus (iNPH).

Subjects And Methods: The subjects were 15 patients with possible iNPH, aged 62-83 (mean 75.3, the ratio of males to females to 6:9), who were treated at our department during the period from June to September, 2004.