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open access

Vol 4, No 2 (2002)
Prace oryginalne
Published online: 2003-03-11
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Brainstem life potential in the evaluation of surviving prognosis in the group of patients with brainstem insufficiency of different etiology

Maciej Binek, Barbara Książkiewicz, Jacek Wiśniewski
Udar Mózgu. Problemy Interdyscyplinarne 2002;4(2):53-64.

open access

Vol 4, No 2 (2002)
Prace oryginalne
Published online: 2003-03-11

Abstract

Background. Every day of brainstem insufficiency diminishes probability of patient survival. The aim of the study was to prepare a coefficient based on the quantitative assessment of brainstem insufficiency and its duration which could be used in defining survival prognosis of the patients.
Material and methods. 99 patients with brainstem insufficiency in the course of: ischemic stroke (34), hemorrhagic stroke (53), cardiac arrest (12). Patient's state was estimated with Brainstem Insufficiency Scale (BIS) which was then used to calculated the new coefficient - brainstem life potential. Curves of the survival probability where drawn on the basis of brainstem life potential.
Results. Brainstem life potential calculation was based a following patterns.
First day: Pc(1) = 63 - BIS(1), one of the next days: Pc(n) = 63 – BIS(n);
First day: Pu(1) = Pc(1) = 63 – BIS(1), one of the next days: Pu(n) = Pc(1) + Pc(2) + ... + Pc(n),
where: Pc(n) - partial brainstem life potential for day n; Pu(n) - brainstem life potential one for day n (from first day to n - include n); BIS(n) - value BIS in day n where n is number of days of brainstem insufficiency.
Conclusions. Brainstem life potential expresses quantitative depth of brainstem insufficiency and time of its duration. Decease probability curves permit by percentage to qualify the risk of decease for individual ill. Survival prognosis is different in every evaluated group of patients with brainstem insufficiency of different etiology.

Abstract

Background. Every day of brainstem insufficiency diminishes probability of patient survival. The aim of the study was to prepare a coefficient based on the quantitative assessment of brainstem insufficiency and its duration which could be used in defining survival prognosis of the patients.
Material and methods. 99 patients with brainstem insufficiency in the course of: ischemic stroke (34), hemorrhagic stroke (53), cardiac arrest (12). Patient's state was estimated with Brainstem Insufficiency Scale (BIS) which was then used to calculated the new coefficient - brainstem life potential. Curves of the survival probability where drawn on the basis of brainstem life potential.
Results. Brainstem life potential calculation was based a following patterns.
First day: Pc(1) = 63 - BIS(1), one of the next days: Pc(n) = 63 – BIS(n);
First day: Pu(1) = Pc(1) = 63 – BIS(1), one of the next days: Pu(n) = Pc(1) + Pc(2) + ... + Pc(n),
where: Pc(n) - partial brainstem life potential for day n; Pu(n) - brainstem life potential one for day n (from first day to n - include n); BIS(n) - value BIS in day n where n is number of days of brainstem insufficiency.
Conclusions. Brainstem life potential expresses quantitative depth of brainstem insufficiency and time of its duration. Decease probability curves permit by percentage to qualify the risk of decease for individual ill. Survival prognosis is different in every evaluated group of patients with brainstem insufficiency of different etiology.
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Keywords

clinimetry; brainstem insufficiency; stroke

About this article
Title

Brainstem life potential in the evaluation of surviving prognosis in the group of patients with brainstem insufficiency of different etiology

Journal

Interdisciplinary Problems of Stroke

Issue

Vol 4, No 2 (2002)

Pages

53-64

Published online

2003-03-11

Bibliographic record

Udar Mózgu. Problemy Interdyscyplinarne 2002;4(2):53-64.

Keywords

clinimetry
brainstem insufficiency
stroke

Authors

Maciej Binek
Barbara Książkiewicz
Jacek Wiśniewski

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