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Cerebrospinal fluid absorption mechanism based on measurement of cerebrospinal fluid flow rate in shunt tube

, : Cerebrospinal fluid absorption mechanism based on measurement of cerebrospinal fluid flow rate in shunt tube. Brain & Nerve (Tokyo) 37(4): 365-370

CSF absorption mechanisms in cases of hydrocephalus was investigated on the basis of measurements of CSF flow in a shunt tube after ventriculo-peritoneal shunt surgery, monitoring of intracranial pressure, CT findings, radioisotope cisternography, cerebral blood flow, EEG, PSP tests and changes in neurological findings. The subjects were 6 males and 7 females aged from 18-70 yr. CSF flow rates in the shunt tubes were between 0.01-1.93 ml/min. Calculating the daily volume of CSF flow, the subjects were divided into 2 groups: Group A (8 patients) with a volume of < 150 ml/day (0.01-0.25 ml/min), and Group B (5 patients) with between 150 and 500 ml/day (0.01-1.93 ml/min). Monitoring of intracranial pressure prior to the shunt operation was performed in 10 cases. These pressure values ranged between 4 and 25 mm Hg (mean: 7-8 mm Hg), and there was no difference between the 2 groups. The pre- and post-operative radioisotope cisternography findings indicated improvement of ventricular dilatation, periventricular lucency and ventricular reflux. After the shunt operations, there was neurological improvement in 6 of the 8 Group A cases but only in 2 of the 5 Group B cases. Considering the CSF flow volumes of the 2 groups, it appears that in Group A the shunt tube is not the main CSF circulation pathway. This could mean that resistance to CSF absorption in the cerebrospinal space has decreased after the shunt operation and there has been recovery of the physiological CSF absorption pathways, i.e., neurological improvement can be expected in this group A.


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Thiaucourt, Paul, 1998: Notes sur les genres Maschane Walker et Dylomia felder description de trois especes nouvelles de Guyane francaise. The monophyletic taxa Dylomia Felder, 1874, and Maschane Walker, 1863, are to be considered as subgenera of Maschane Walker, and Pontala Walker, 1864, as a valid generic name; descriptions are given of M. (M.) ornato, M. (M.) fucata and M. D.) her...

Rosenberg, Allan J., 2000: Gastric emptying 13C breath test in pediatric patients. American Journal Of Gastroenterology. 95(9): 2462-2463, Ember

Matsumoto, N.; Tamura, S.; Moser, A.; Moser, H.W.; Braverman, N.; Suzuki, Y.; Shimozawa, N.; Kondo, N.; Fujiki, Y., 2001: The peroxin Pex6p gene is impaired in peroxisomal biogenesis disorders of complementation group 6. Human genetic peroxisomal biogenesis disorders (PBDs), such as Zellweger syndrome, comprise 13 different complementation groups (CGs). Eleven peroxin genes, termed PEXs, responsible for PBDs have been identified, whereas pathogenic genes for PBDs...

Shah, C.C.; Deloney, L.A.; Donepudi, C.; Bhutta, S.T.; James, C.A., 2010: Establishment of a simple and inexpensive remote radiology conference. Journal of the American College of Radiology 6(12): 884-885

Kim, H.; Han, J.-Ran; Park, J.; Oh, M.; James, S., E.; Chang, S.; Lu, Q.; Lee, K.-Youl; Ki, H.; Song, W.-Joo; Kim, K., 2008: Delta-catenin-induced dendritic morphogenesis - An essential role of p190RhoGEF interaction through Akt1-mediated phosphorylation. delta-Catenin was first identified through its interaction with Presenilin-1 and has been implicated in the regulation of dendrogenesis and cognitive function. However, the molecular mechanisms by which delta-catenin promotes dendritic morphogenes...

Simonsmeier, L.M.; Fink, J.L., 1988: Legal implications of drug testing in the workplace. American Pharmacy Ns28(7): 30-37

Wilson, Dennis., 1995: Fungal endophytes which invade insect galls: insect pathogens, benign saprophytes, or fungal inquilines?. Fungi are frequently found within insect galls. However, the origin of these fungi, whether they are acting as pathogens, saprophytes invading already dead galls, or fungal inquilines which invade the gall but kill the gall maker by indirect means...

Singh, K.; Mathur, R.S., 1968: Histochemical demonstration of certain testicular enzymes of the Indian desert gerbil Meriones hurrianae Jerdon and their response to unilateral cryptorchidism. Histochemie. Histochemistry. Histochimie 15(3): 204-211

Michalik J.; Kovac M., 1982: On some problems of palinspastic reconstructions and Ceno-Mesozoic paleogeographical development of the Western Carpathians. Geologicky Sbornik 33(4): 481-507

Karpova, E.V.; Kostiuchenko, V.I., 1963: Experience in lowering endemic goiter morbidity in some population points in the Iaroslav region. Gigiena i Sanitariia 28: 70-74