Document Detail

Electrical impedance tomography can rapidly detect small pneumothoraces in surfactant-depleted piglets.
MedLine Citation:
PMID:  22120769     Owner:  NLM     Status:  Publisher    
PURPOSE: Diagnosis of pneumothorax relies on clinical suspicion and chest X-ray, and is often delayed. We aimed to determine whether electrical impedance tomography (EIT) can accurately identify the presence of surgically created pneumothoraces before significant changes in clinical parameters. METHODS: Six anesthetized and muscle-relaxed piglets with surfactant-depleted lungs were studied. Following chest drain insertion into the right ventral chest, 10-20 ml aliquots of air were instilled into the pleural space to a maximum volume of 200 ml. The pneumothorax was drained by attaching a Heimlich valve to the chest drain. At each instillation and after draining the pneumothorax, global and regional end-expiratory intra-thoracic volumes (EEV) were measured using respiratory inductive plethysmography (RIP) and EIT concurrently with [Formula: see text], heart rate and blood pressure. RESULTS: A significantly greater change in both global EEV(RIP) and EEV within the right ventral quadrant was seen at all volume instillations, from as little as 10 ml, compared with all other quadrants. There was no difference in EEV within the left ventral and both dorsal quadrants. [Formula: see text] fell below 90% at 100 ml instillation. Tachycardia occurred at 140 ml instillation. EIT identified a 60% resolution of pneumothoraces within 60 s of attachment of the Heimlich valve. CONCLUSIONS: EIT accurately detects very small pneumothoraces before physiological parameters change.
Risha Bhatia; Georg M Schmölzer; Peter G Davis; David G Tingay
Related Documents :
9290989 - Measurement of cardiac output by transesophageal echocardiography in mechanically venti...
20090539 - Cardiac output derived from arterial pressure waveform analysis without calibration vs....
24820119 - A new method for performing continuous manometry during pleural effusion drainage.
14665559 - Cardiovascular changes during drainage of pericardial effusion by thoracoscopy.
3607369 - Systemic haemodynamic actions of pimobendan (ud-cg 115 bs) and its o-demethylmetabolite...
6637819 - Hemodynamic comparison of primary venous or arteriolar dilatation and the subsequent ef...
2362259 - Stability of home blood pressure over time.
15931959 - Long-term atmospheric mercury wet deposition at underhill, vermont.
2668449 - A historical perspective of elevated systolic vs diastolic blood pressure from an epide...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-26
Journal Detail:
Title:  Intensive care medicine     Volume:  -     ISSN:  1432-1238     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7704851     Medline TA:  Intensive Care Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Neonatal Research, Murdoch Childrens Research Institute, Melbourne, Australia,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Factors affecting consent in pediatric critical care research.
Next Document:  Classification of surgical processes using dynamic time warping.