Comparison of cardiac output measurements between NICO and the pulmonary artery catheter during repeat surgery for total hip replacement.
OBJECTIVE
The aim of this study was to compare cardiac output measurements of the non-invasive cardiac output and the pulmonary artery catheter during repeat surgery for hip replacement.


METHODS
In this prospective observational study, patients undergoing repeat hip surgery who needed a pulmonary artery catheter were included. A standard protocol was followed for induction, endotracheal intubation and maintenance of anaesthesia (sufentanil, etomidate, sevoflurane, cisatracurium). After endotracheal intubation, the non-invasive cardiac output was connected and a pulmonary artery catheter was inserted. Data were collected every 3 min until patients were extubated.


RESULTS
Ten patients were included and 2455 points of comparison recorded. Cardiac output from the pulmonary artery catheter varied from 1.7 to 8.9 L min(-1) (mean 4.1 L min(-1)) and the non-invasive cardiac output (using averaging mode) from 1.7 to 8.0 L min(-1) (mean 3.7 L min(-1)). There was a significant correlation between them (P < 0.01; bias 0.3 L min(-1); limits of agreement +1.9 and -2.5 L min(-1)), although these differed between patients.


CONCLUSIONS
The perioperative bias was small and the non-invasive cardiac output slightly underestimated cardiac output intraoperatively compared to the pulmonary artery catheter. The bias was smaller when mean cardiac output was below 3 L min(-1). Core temperature between 34.4 degrees C and 37.6 degrees C had no influence on the differences.
Gueret
G
G
University Hospital, Anesthesiology and Critical Care Department, La Cavale Blanche, Brest, France. gildas.gueret@chu-brest.fr
Kiss
G
G
Khaldi
S
S
Le Jouan
R
R
Le Grand
A
A
Perrament
Y
Y
Lefèvre
C
C
Arvieux
C C
CC
D000368:Aged; D000369:Aged, 80 and over; D018685:Anesthetics, Inhalation / Q000627:therapeutic use; D018686:Anesthetics, Intravenous / Q000627:therapeutic use; D019644:Arthroplasty, Replacement, Hip; D001279:Atracurium / Q000031:analogs & derivatives / Q000627:therapeutic use; D002302:Cardiac Output / Q000502:physiology*; D002407:Catheterization, Swan-Ganz / Q000379:methods*; D005045:Etomidate / Q000627:therapeutic use; D005260:Female; D006622:Hip Prosthesis; D006801:Humans; D007442:Intubation, Intratracheal; D008297:Male; D008738:Methyl Ethers / Q000627:therapeutic use; D016343:Monitoring, Intraoperative / Q000379:methods*; D009466:Neuromuscular Blocking Agents / Q000627:therapeutic use; D011446:Prospective Studies; D012086:Reoperation; D000077149:Sevoflurane; D012984:Software; D017409:Sufentanil / Q000627:therapeutic use
D018685:Anesthetics, Inhalation; D018686:Anesthetics, Intravenous; D008738:Methyl Ethers; D009466:Neuromuscular Blocking Agents; D001279:Atracurium; D000077149:Sevoflurane; D017409:Sufentanil; C101584:cisatracurium; D005045:Etomidate