The low fresh gas flow anesthesia and hypothermia in neonates undergoing digestive surgeries: A retrospective before-after study

Abstract

<jats:title>Abstract</jats:title> <jats:p><jats:bold>Background</jats:bold>: Based on the previous investigation in our institution, the incidence of intraoperative hypothermia in neonates was high. Since September 1<jats:sup>st</jats:sup>, 2019, the recommendation had been launched to utilize ≤1 L/min fresh gas flow during the neonates’ surgical procedure. We therefore intended to evaluate the association between low fresh gas flow anesthesia and the occurrence of hypothermia in neonates undergoing digestive surgeries. <jats:bold>Methods:</jats:bold> A retrospective chart review, before-after study was conducted for neonates who underwent digestive surgeries. The primary outcomes were the incidence of hypothermia. The secondary outcomes included hospital mortality, the value of lowest temperature, blood loss, mean body temperature during the surgery, the length of hypothermia during the surgery and postoperative hospital length-of- stay (PLOS). <jats:bold>Results: </jats:bold>249 neonates fulfilled the eligibility criteria. The overall incidence of intraoperative hypothermia was 81.9%. The low fresh gas flow anesthesia significantly reduced the odds of hypothermia [routine group: 149 (87.6%) versus low flow group: 55 (69.6%); p ＜ 0.01]. Moreover, the low fresh gas flow anesthesia could reduce the length of hypothermia [routine group: 104 mins (50, 156) versus low flow group: 30 mins (0,100); p ＜ 0.01], as well as elevate the value of lowest temperature for neonates [routine group: 35.1℃ (34.5, 35.7) versus low flow group: 35.7℃ (35.3, 36); p ＜ 0.01]. After adjustment for confounding, low fresh gas flow anesthesia and the length of surgical time were independently associated with intraoperative hypothermia.<jats:bold>Conclusions: </jats:bold>Low fresh gas flow anesthesia is an effective way to alleviate hypothermia in neonates undergoing open digestive surgery.</jats:p>

The effect of low flow anesthesia on hemodynamic and peripheral oxygenation parameters in obesity surgery

“…Despite its prominent advantages such as reduction of environmental pollution, minimal loss of heat and moisture, and low cost due to the use of less anesthetic drugs, low-flow anesthesia needs a more advanced technical infrastructure due to the necessity to follow the patients more closely. [1][2][3] Obesity surgery may lead to many complications, such as difficult intubation, https://smj.org.sa Saudi Med J 2021; Vol. 42 (3) increased risk of atelectasis, obesity hypoventilation syndrome, and so forth.…”

“…[1][2][3] Obesity surgery may lead to many complications, such as difficult intubation, https://smj.org.sa Saudi Med J 2021; Vol. 42 (3) increased risk of atelectasis, obesity hypoventilation syndrome, and so forth. [4][5][6] In these patients, respiratory capacity, which is already constrained due to obesity, is further limited due to the presence of carbon dioxide (CO 2 ) insufflation and the lithotomy position during laparoscopic surgery.…”