title: Experimental evaluation of central venous pressure monitoring in the dog.
abstract: The measurement of central venous pressure (CVP) will provide objective information about intravascular blood volume. Limitations exist with direct and indirect methods of measuring CVP; however, the purpose of this study was to determine if such factors as catheter size, patient position, or measurements taken with either a water manometer or a strain-gauge transducer would affect the accuracy of CVP measurements. The study population consisted of six adult, mixed-breed dogs. Catheter sizes evaluated were 16- and 19-gauge. Patient positions evaluated were right and left lateral recumbencies. Right atrial pressures (RAPs) were used as the reference standards for CVP measurements. Measurements of RAP and CVP were obtained with a water manometer and a strain-gauge transducer. No significant differences were observed in measured CVPs for the effects of catheter size and right versus left lateral recumbency. A 2.7-mmHg difference in water manometry was demonstrated when compared to strain-gauge transducer measurements. Also, strain-gauge transducer measurements had less precision compared to water manometer measurements.
authors.affiliation: Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing 48824, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Oakley
authors.forename: B
authors.initials: B
authors.lastname: Olivier
authors.forename: G E
authors.initials: GE
authors.lastname: Eyster
authors.forename: J G
authors.initials: JG
authors.lastname: Hauptman
mesh_terms: D000818:Animals; D015924:Blood Pressure Monitors / Q000662:veterinary*; D002405:Catheterization, Central Venous / Q000662:veterinary; D002496:Central Venous Pressure; D004285:Dogs / Q000502:physiology*; D005069:Evaluation Studies as Topic; D016014:Linear Models; D008365:Manometry / Q000662:veterinary; D012015:Reference Standards; D014160:Transducers, Pressure / Q000662:veterinary