(magistrsko delo)
Ivo Kaučič (Author), Miljenko Križmarić (Mentor)

Abstract

Uvod: Dvig nog je pogost in enostaven manever, ki se ga kot prva pomoč nudi osebi s kratkotrajno izgubo zavesti (sinkopi). Na ta način z gravitacijo povzročimo prenos krvi iz sistemske cirkulacije spodnjih okončin v srce (avtotransfuzijo), kjer se zaradi višjega pritoka krvi poveča iztis srca. Namen raziskave je bil ugotoviti razlike, ki se pojavljajo v hemodinamičnih spremenljivkah pri dvigu nog na različne naklone. Metode: V eksperimentalni študiji smo s pomočjo hemodinamičnega Task Force® monitorja na zdravih prostovoljcih simulirali sinkopo in ugotavljali iztis srca pri mirovanju (0°) ter naklonih nog 30°, 45° in 90°. Razlike smo ugotavljali s pomočjo Friedmanovega testa, post hoc pa s parnim Wilcoxonovim testom predznačenih rangov (z Bonferronijevo korekcijo) v programskem orodju IBM SPSS 22. Rezultati: Pri dvigu nog iz položaja 30° v 90° se je minutni iztis srca signifikantno dvignil za 0,5±0,6 l/min, kar je znašalo 7,56 % (Z = -2,417; p = 0,016). Statističnih razlik med položajema dvig 45° in 90° ni bilo, čeprav se je minutni iztis srca dvignil za 0,4±0,6 l/min (+5,97 %). Prav tako nismo ugotovili statističnih razlik pri primerjavi vrednosti frekvence srca oziroma iztisa srca pri različnih naklonih nog. Diskusija: Povečanje količine krvi v srcu povzroči povečanje iztisa, posledično pa se poveča tudi krvni tlak in prekrvavitev organov. V povprečju dosežemo najvišje povečanje minutnega iztisa srca, frekvence srca ter iztisa srca z dvigom nog na 90°, vendar lahko statistične razlike med dvigi nog lahko v tem trenutku potrdimo le v primeru minutnega iztisa srca pri dvigu nog na 30° in 90

Keywords

omedlevica;dvig nog;hemodinamika;minutni iztis srca;frekvenca srca;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FZV - Faculty of Health Sciences
Publisher: [I. Kaučič]
UDC: 612.178:004.358(043.2)
COBISS: 2349732 Link will open in a new window
Views: 1059
Downloads: 98
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Other data

Secondary language: English
Secondary title: The effectiveness of a systemic circulation autotransfusion from the lower limbs during a syncope simulation
Secondary abstract: Introduction: The leg raise maneuver is a simple and basic way to provide first aid to a person with short-term loss of consciousness (syncope). Gravity causes the transfer of blood from the systemic circulation of the lower extremities to the heart. The increased blood flow consequently increases the cardiac output. The aim of this study is to determine the effectiveness of the autotransfusion caused by raising the legs at different angles. Methods: Our experimental study was conducted thru monitoring with the Task Force® monitor. Our sample consisted of healthy subjects. We monitored hemodynamic variables while the legs were positioned at 0° and later at different angles (30°, 45° and 90°). Data collection and analysis was conducted IBM SPSS Statistics 22, with the Friedman test and post hoc paired Wilcoxon signed-rank with the Bonferroni correction applied. Results: A comparison of the 30° and 90° leg raise showed a significant cardiac output increase of 0,5±0,6 l/min which is 7,56 % (Z = -2,417; p = 0,016). Statistical significance difference between the 45° and 90° leg raise could not be concluded, although the cardiac output increased by 0,4±0,6 l/min (5,97 %). We also determined that there were no statistical significances in the differences between the mean values of heart rate or stroke volume at different angles. Discussion: Increased blood volume consequently increases blood flow, blood pressure and organ blood supply. We concluded that the highest cardiac output, heart rate and stroke volume mean increase can be achieved by raising the legs by 90°, but at this moment we are only able to confirm the statistical significance of the differences in cardiac output between the 30° and 90° leg raises.
Secondary keywords: fainting;leg raise;hemodynamics;cardiac output;heart rate;Computer simulation;Blood transfusion, Autologous;Autotransfusion;Syncope;Cardiac output;Računalniška simulacija;Transfuzija krvi;Avtotransfuzija;Sinkopa;Srčni pretok;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za zdravstvene vede
Pages: V, 32 f.
ID: 10838378