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
Filter
  • Pancreatic enzyme substitution  (1)
  • Pulsatility index  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Transcranial Doppler sonography in adult hydrocephalic patients (2000)
    Springer
    Neurosurgical review 23 (2000), S. 34-38 
    Details
    ISSN: 1437-2320
    Keywords: Key words Hydrocephalus ; Intracranial pressure ; Pulsatility index ; Resistance index ; Transcranial Doppler sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Transcranial Doppler sonography (TCD) is a noninvasive technique for measurement of cerebral blood flow velocity (CBFV) in the major arteries of the circle of Willis. Dynamic changes in the pulsatility index (PI) and the resistance index (RI), as calculated from TCD data, allow for an assessment of the forces acting on the terminal vasculature of the brain. The present study was designed to investigate a possible relationship between TCD parameters and intracranial pressure (ICP) changes in adult patients with hypertensive hydrocephalus. Blood flow velocity in the middle cerebral artery (MCA) was studied by TCD in 29 hydrocephalus patients and in 20 healthy controls. ICP was measured in the patient group before ventricular shunting and was correlated with TCD data. The mean CBFV in hydrocephalic patients prior to ventriculoperitoneal shunting was significantly lower than in the control group. Compared to normal persons, systolic and end-diastolic CBFV values in patients were significantly decreased, suggesting an increased distal cerebrovascular resistance. PI and RI values in patients with elevated ICP prior to shunting were significantly increased in comparison to those of normal persons. There was a statistically significant positive correlation of preshunting ICP and mean preshunting values of RI (r=0.50, P〈0.01) in hydrocephalic patients, but no significant correlation between PI and ICP, and between CBFV and ICP. Immediately after shunting, ICP returned to normal, and PI and RI values decreased significantly, while the mean CBFV increased. In a subgroup of hydrocephalic patients with a preshunting ICP value 〉35 mm Hg (n=6), the changes described above were more pronounced than in the subgroup with preshunting ICP values 〈35 mm Hg, which suggests an exponential degree of influence of ICP on TCD parameters. In conclusion, TCD may provide a tool for assessment of ICP in adult patients with occlusive hydrocephalus, although an exact noninvasive measurement of ICP by TCD seems impossible. Changes in the RI and PI indices appear to be useful indicators of elevated ICP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101430050029
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen über die Anwendbarkeit tryptischer und chymotryptischer Aktivitätsmessung im Stuhl in Diagnostik und Therapie der Mucoviscidosis (1976)
    Springer
    European journal of pediatrics 122 (1976), S. 107-115 
    Details
    ISSN: 1432-1076
    Keywords: Prematures ; Infants ; Children ; Cystic fibrosis ; Dystrophy ; Diagnosis ; Therapy ; Pancreatic enzyme substitution ; Fecal fat ; Digestion ; Feces ; Tryptic activity ; Chymotryptic activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter gewissen Voraussetzungen ist die Bestimmung der tryptischen, besonders aber der chymotryptischen Aktivität im Stuhl vor allem während der ersten 4–6 Lebenswochen als wichtige Maßnahme in der Diagnostik der Mucoviscidosis anzusehen. Nach Absetzen des Pankreasenzympräparates fällt die tryptische und chymotryptische Aktivität des Stuhles Mucoviscidosis-kranker Kinder ab. Nach Verabfolgung des Präparates steigt die Enzymaktivität in Abhängigkeit von der Höhe der Dosis an und erreicht die Aktivitätswerte altersentsprechender gesunder Kinder. Ein Vergleich zwischen der proteolytischen Aktivität und dem Fettgehalt des Stuhles im Rahmen von Untersuchungsperioden ohne Gabe des Pankreasenzympräparates und bei unterschiedlicher Dosierung des Präparates läßt eine signifikante Korrelation der beiden Parameter vermissen. Es ist nicht erlaubt, aus einer hohen proteolytischen Aktivität des Stuhles auf eine entsprechend verminderte Fettausscheidung zu schließen, da sich fäkale proteolytische Aktivität und Fettausscheidung nicht umgekehrt proportional zueinander verhalten. Man kann deshalb die Höhe der proteolytischen Aktivität im Stuhl von Mucoviscidosis-Patienten nicht als allgemeinen Maßstab für die gesamte Verdauungsleistung bei Pankreasenzymsubstitution betrachten.
    Notes: Abstract Under certain conditions the determination of the tryptic activity, especially of the chymotryptic activity in the feces mostly of infants in the first 4–6 weeks of life is considered to be an important step in the diagnosis of cystic fibrosis. The tryptic and chymotryptic activity in the feces of children with cystic fibrosis declines when the substitution of pancreatic enzymes is stopped. On resubstitution, the activity rises in relation to the dose and attains the activity related to age as found in healthy children. A comparison of the proteolytic activity with the fat content of the feces during the study period without the enzyme substitution and during the period when the enzyme dosage varied showed no significant correlation. It is not possible to postulate a poor excretion of fats merely from the high proteolytic activity of the feces because the fecal proteolytic activity and the fat excretion are not inversely proportional to one another. For this reason, one cannot conclude that the grade of the proteolytic activity in the feces of patients with cystic fibrosis is a yardstick for the total digestive process when they are under pancreatic enzyme substitution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00466269
    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...