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Effect of One‐Lung Ventilation With or Without Low‐Pressure Carbon Dioxide Insufflation on Cardiorespiratory Variables in Cats Undergoing Thoracoscopy
Author(s) -
Mayhew Philipp D.,
Pascoe Peter J.,
ShiloBenjamini Yael,
Kass Philip H.,
Johnson Lynelle R.
Publication year - 2015
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.2014.12272.x
Subject(s) - medicine , anesthesia , cats , insufflation , ventilation (architecture) , thoracoscopy , surgery , mechanical engineering , engineering
Objectives To document a technique for one‐lung ventilation (OLV) in cats and evaluate the effect of low‐pressure carbon dioxide insufflation and OLV (OLV–CDI) on cardiorespiratory variables in cats. Study design Prospective randomized study. Animals Cats (n = 6). Methods General anesthesia was induced using a standardized anesthetic protocol. A thermodilution catheter was placed into the pulmonary artery using fluoroscopic guidance. Two 6 mm thoracoscopic cannulae were placed at a subxiphoid and intercostal location, respectively, to allow direct observation of all lung lobes. OLV was induced using an endobronchial blocker, which was placed into the right and left main stem bronchi in randomized order using bronchoscopic guidance. Cardiorespiratory variables were measured at 5 and 30 minutes after induction of OLV and subsequently at 5 and 30 minutes after initiation of OLV–CDI at intra‐thoracic pressures of 3 mmHg. Results Left‐sided OLV was successful in 5 cats, right‐sided OLV was successful in 2 cats, and neither was successful in 1 cat. No significant effects on hemodynamic variables or oxygen delivery were observed after right or left‐sided OLV alone. Hemodynamic variables were also well‐preserved after OLV–CDI; however, oxygen delivery was significantly lower after left OLV–CDI compared with right OLV–CDI, and in 2 cats, severe desaturation occurred after L‐OLV–CDI before the 30 minute time point. Conclusions OLV can be used in cats for thoracoscopic interventions. Although right OLV–CDI was tolerated better than left OLV–CDI, the technique requires further investigation before it can be recommended for widespread clinical use.