New Findings: What is the central question of the study? Does respiratory support ensure blood gas homeostasis and the relevance of experimental outcomes? What is the main finding and its importance? Spontaneous breathing during surgical intervention under anaesthesia results in impaired gas exchange and loss of diaphragm muscle strength in rats. Subsequent short-term mechanical ventilation restored blood gas homeostasis and diaphragm muscle strength. Blood gas homeostasis interferes substantially with experimental conditions and may alter study results.
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