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Abdominal compressions increase vital organ perfusion during CPR in dogs: relation with efficacy of thoracic compressions.

Abstract：

STUDY OBJECTIVE:Abdominal compressions can be interposed between the thoracic compressions of standard CPR (SCPR). The resulting interposed abdominal compression CPR (IAC-CPR) may increase blood pressures and patient survival, particularly if applied as a primary technique after in-hospital cardiac arrest. We used a predominant cardiac compression canine model to study the effects of IAC-CPR on blood pressures and total and vital organ perfusion as a function of time after cardiac arrest and efficacy of SCPR. DESIGN:In a crossover design, we measured blood pressures and total and regional blood flow (radioactive microspheres) during 6-minute episodes of mechanical SCPR and IAC-CPR, both early (4 to 16 minutes) and late (18 to 30 minutes) after induction of ventricular fibrillation in eight dogs (weight, 25 to 33 kg) under neuroleptanalgesia/anesthesia. RESULTS:During IAC-CPR, the ascending aortic-right atrial pressure gradient increased (P < .05), and retrograde pressure pulses contributed to the rise of ascending aortic pressure. Within 2 minutes after the start of IAC-CPR, end-tidal CO2 fraction increased by 0.6 +/- 0.4 vol% (P < .05), suggesting enhanced venous return. IAC-CPR enhanced (P < .05) total forward blood flow (574 +/- 406 versus 394 +/- 266 mL/minute during SCPR for the early phase) and vital organ perfusion (including myocardium), in both early and late phases. The IAC-CPR-induced augmentation of blood flow was greater if perfusion was relatively high during SCPR. CONCLUSION:Compared with predominant cardiac compressions alone (SCPR), the addition of interposed abdominal compressions (IAC-CPR) improves total and vital organ oxygen delivery through enhanced venous return and perfusion pressures.

journal_name

Ann Emerg Med

journal_title

Annals of emergency medicine

authors

Hoekstra OS,van Lambalgen AA,Groeneveld AB,van den Bos GC,Thijs LG

doi

10.1016/s0196-0644(95)70298-9

subject

Has Abstract

pub_date

1995-03-01 00:00:00

pages

375-85

issue

3

eissn

0196-0644

issn

1097-6760

pii

S0196-0644(95)70298-9

journal_volume

25

pub_type

杂志文章

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