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Impact of flow and temperature on non‐dyspnoeic dogs' tolerance undergoing high‐flow oxygen therapy
Author(s) -
Harduin C.,
Allaouchiche B.,
Nègre J.,
GoyThollot I.,
Barthélemy A.,
Fougeray A.,
Baudin F.,
BonnetGarin J. M.,
PouzotNevoret C.
Publication year - 2021
Publication title -
journal of small animal practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 67
eISSN - 1748-5827
pISSN - 0022-4510
DOI - 10.1111/jsap.13284
Subject(s) - nasal cannula , medicine , anesthesia , sedation , respiratory rate , oxygen saturation , heart rate , ventilation (architecture) , cannula , oxygen , blood pressure , surgery , chemistry , organic chemistry , mechanical engineering , engineering
Objectives To prospectively describe the impact of gas flow rate and temperature on dog's tolerance of high‐flow nasal oxygen therapy during recovery from anaesthesia, hypothesizing that higher flow rates and temperatures will decrease tolerance. Materials and Methods Twelve non‐dyspnoeic client‐owned dogs recovering from general anaesthesia were included in this study. After extubation, a nasal cannula was positioned and high‐flow nasal oxygen therapy was initiated. Two flow rates (two or four time the theoretical minute ventilation: HF2 and HF4), each of them combined with two temperatures (31 and 37°C: T31 and T37), were randomly applied (four conditions per dog). For each condition, cardiovascular and respiratory parameters (heart rate, respiratory rate, systolic arterial blood pressure and pulse oximeter oxygen saturation), sedation score and tolerance score were recorded at initiation (T 0 ) and after 10 minutes of accommodation (T 10 ). Results Sedation scores were not significantly different between the four conditions. Cardiovascular and respiratory parameters were not significantly different between any condition at both T 0 and T 10 . Tolerance scores were good and not significantly different between any flow rate or temperature (HF2‐T31: 4 (2‐4), HF4‐T31: 4 (2‐4), HF2‐T37: 4 (2‐4), HF4‐T37: 4 (1‐4)). Clinical Significance The gas flow rates and temperatures studied have no impact on tolerance during the recovery period of non‐dyspnoeic dogs, and high‐flow nasal cannula is well tolerated. Further studies are required to confirm these results in dyspnoeic dogs.