Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    A computer system for the identification of the cerebrospinal compensatory model (1990)
    Springer
    Acta neurochirurgica 105 (1990), S. 112-116 
    Details
    ISSN: 0942-0940
    Keywords: Cerebrospinal compensatory model ; computer system ; CSF infusion test ; intracranial pressure ; CSF resorption resistance ; pressure-volume index ; CSF formation rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A computer system, based on IBM PC, was designed for the cerebrospinal compensatory model identification. The intracranial pressure (ICP) signal, registered during the lumbo-lumbar infusion test is analyzed by means of the spectral analysis algorithm in order to measure precisely the pulse wave amplitude. The amplitude and the mean ICP level, calculated repetetively within the period of about 8 seconds, are stored on the disk and form the basis for further model identification. Three different methods of identification were applied. They enable one to estimate the fundamental model parameters, such as: resistance to the cerebrospinal fluid resorption, pressure-volume index, baseline pressure, rate of formation of the cerebrospinal fluid. Statistical evaluation of the results of the infusion test analysis obtained by means of the system described in two groups of hydrocephalic patients (children and adults) is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669992
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Comparison between classic-differential and automatic shunt functioning on the basis of infusion tests (1990)
    Springer
    Acta neurochirurgica 106 (1990), S. 1-8 
    Details
    ISSN: 0942-0940
    Keywords: Hydrocephalus ; shunts ; intracranial pressure ; infusion test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Infusion tests were performed in order to examine cereospinal compensatory ability in two groups of patients with impaired compensation, subjected to shunt implantation. The functioning of the classic differential shunts was compared to the automatically (Orbis-Sigma) functioning shunts. The reference group, with intact compensatory parameters is also presented. The influence of different types of shunts on the intracranial compensation ability was compared. Automatic shunts produce less decrease in the resorption resistance of CSF in the post-shunted examination than the classic differential shunts. Classic differential shunts disturb the mono-exponential character of the pressure-volume relationship in a higher degree than automatic shunts. Shunt functioning models were proposed as well as the method of detection of eventual recovery to the normal resorption reserve. This method can be applied only to patients with automatic shunts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01809325
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The role of cerebrospinal compensatory parameters in the estimation of functioning of implanted shunt system in patients with communicating hydrocephalus (preliminary report) (1989)
    Springer
    Acta neurochirurgica 101 (1989), S. 112-116 
    Details
    ISSN: 0942-0940
    Keywords: Communicating hydrocephalus ; intracranial pressure ; shunt implantation ; resistance to CSF outflow ; CSF formation rate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Twelve patients presenting with communicating hydrocephalus were studied. In 9 cases where the mean ICP level remained below 10mmHg the symptoms of normal pressure hydrocephalus were observed. All of the patients were treated by shunt system implantation. The clinical and psychological state, cranial computerized tomography and parameters of the cerebrospinal compensatory mechanisms, evaluated using the constant rate infusion test were compared before and after treatment. In most of the patients (11) the pathologically enlarged ventricles persisted. Only in three cases no clinical improvement was noticed. In this group the resistance to the cerebrospinal fluid absorption and the fluid formation rate were estimated as normal. In the group with improvement the normalization of the resistance (4), decrease in the cerebrospinal fluid formation rate (4) and decrease in the cerebrospinal system elasticity (1) can be pointed out as factors responsible for improvement manifested after shunting. Therefore the resorption resistance and the formation of cerebrospinal fluid should be considered as predictive factors in the shunt implantation in hydrocephalic patients, and play an important role in the diagnosis of this entity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410524
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...