A Comparison of the Effects of Lung Protective Ventilation and Conventional Ventilation on Thermoregulation During Anaesthesia

Yüksek, Ahmet; Bakı, Elif Doğan; Sarıtaş, Tuba Berrak; Sivaci, Remziye

doi:10.5152/tjar.2018.73659

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…In another study, a decrease in pulmonary cytokine concentration was observed as a result of TV reduction from 6 to 4 mL kg (21). The most effective way to keep the lung open in perioperative conditions and intensive care is to apply a PEEP (16,22). In our patients, an average of 3.0±1.3 cmH 2 O PEEP was applied and there was no difference between the two groups.…”

Section: Discussionmentioning

confidence: 72%

Can Mechanical Power be Used as a Safety Precaution in Pediatric Patients?

Yüksek¹,

Miniksar²,

Yardimci³

et al. 2022

JARSS

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Objective: Mechanical power (MP) is the amount of energy transferred to the respiratory system of patients during each breath period. After overcoming the resistances required for respiration, the remaining energy may end up by damaging the lung parenchyma. The MP limit that should not be exceeded in pediatric patientsis not yet clear. The aim of this observational descriptive study is to compare the perioperative MP measurements in healthy pediatric cases with the values given in the literature. Methods: Perioperative MP was calculated according to the simplified MP formula in pediatric patients without known lung disease and compared with the literature. Results: The mean age of 34 patients was 68.88±31.4 months and the mean weight was 21.82±7.5 kg. The mean MP was 3.93±1.1 J min -1 , and the indexed MP was 0.19±0.08 J min -1 kg -1 . Both MP (p=0.008) and indexed MP (p<0.001) were significantly higher in patients with high tidal volume. In addition, we found a negative correlation between indexed MP and weight (r: -668 and p<0.001). Both MP and indexed MP had sufficient predictive power to predict tidal volume >10 and predictive value was significant [Auc: 0.764, 95%CI: 0.55-0.97, p: 0.026]. The value of MP>3.76 was an indicator for tidal volume >10 with 87 sensitivity and 50 specificity. Predictive value of indexed MP for tidal volume >10 mL kg -1 was 0.25 J kg -1 [AUC 0.856, 95%CI: 0.70-1.0, p=0.003], and indexed MP was a stronger indicator than MP. Conclusion:This study revealed that MP threshold values calculated for adults or patients with ARDS lung are not sensitive for pediatric patients, and a new threshold value should be determined for these patients.

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Section: Discussionmentioning

confidence: 72%

Can Mechanical Power be Used as a Safety Precaution in Pediatric Patients?

Yüksek¹,

Miniksar²,

Yardimci³

et al. 2022

JARSS

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“…Perioperative temperature losses of the patients were calculated with the formula T1-T2 and recorded as Td. Hypothermia was defined as core temperature below 36°C [5, 10]. Preoperative hypothermic patients were excluded.…”

Section: Methodsmentioning

confidence: 99%

“…Patients with a T2 of <36°C were considered hypothermic. Mild hypothermia refers to core temperatures between 34 and 36°C [10, 11].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Sevoflurane Low-Flow Anesthesia on Preserving Patient Core Temperature

Yüksek¹,

Talih²

2022

Dubai Med J

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Introduction: Low-flow anesthesia (LFA) reduces the fresh gas flow (FGF) entering the anesthesia circuit and saves on the volatile agent used. In this study, the effect of LFA with sevoflurane on core temperature and the incidence of perioperative hypothermia were investigated. Methods: According to the FGF applied, patients were classified into three groups: LFA (1 L/min), medium-flow anesthesia (MFA = 2 L/min), and high-flow anesthesia (HFA = 4 L/min). Patients’ demographic data and the initial (T1) and final (T2) core temperatures during the operation were compared. Results: A total of 160 patients were included in the study. The T2 value of the HFA group was significantly lower than the LFA group (p = 0.028). Different flow values were found to have a significant effect on temperature change (F = 21.630, p < 0.001, partial eta squared = 0.216). There was a significant difference between the mean temperatures measured at two different times (F = 301.064, p < 0.001, partial eta squared = 0.657). The overall incidence of hypothermia was 32.5%, with 52 patients. Hypothermia (T2<36°C) incidences were not different between the LFA group and the MFA and HFA groups (p = 0.682). However, perioperative core temperature loss was significantly lower in the LFA group (p = 0.001). Conclusions: LFA using sevoflurane was not sufficient alone to significantly reduce the incidence of hypothermia. However, we have demonstrated that it may also have a beneficial effect on reducing perioperative temperature loss.

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“…Body heat is lost with the delivery of fresh anaesthetic gases, mainly due to convection and evaporation (Stepaniuk and Brock 2008;Grimm 2015). Yuksek et al (2019) found that lung protective ventilation in humans using positive end expiratory pressure has no advantage in preserving a patient's temperature compared to conventional ventilation. It has been described that the use of heat and moisture exchangers alone cannot prevent development of hypothermia (Hofmeister et al 2011).…”

mentioning

confidence: 99%

Changes in tracheal, oesophageal and rectal temperature over 60 minutes anaesthesia in non-heated dogs, spontaneously breathing or mechanically ventilated

Novák¹,

Burova²,

Stankova³

et al. 2021

Vet. Med. - Czech

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The objective of this prospective randomised clinical study was to determine the differences in the tracheal, oesophageal and rectal temperature in spontaneously breathing or mechanically ventilated dogs. A total of thirty dogs were allocated to the SPO-group breathing spontaneously (n = 15) or the MEC-group ventilated mechanically (n = 15). Anaesthesia was established using a medetomidine-butorphanol-propofol-isoflurane combination. The tracheal (T-Tra), oesophageal (T-Oes), rectal (T-Rec), inspired gas (T-Gas), room (T-Room) temperatures, respiratory frequency (fR), heart rate (HR), mean arterial pressure (MAP) and end-tidal carbon dioxide concentration (ETCO2) were measured after connecting to a re-breathing system (baseline) and subsequently in 10-minute intervals for 60 minutes. The data were analysed using ANOVA and Steel-Dwass tests (P < 0.05). In the SPO-group, the T-Tra, was significantly lower at T30, T40, T50, T60, the T-Oes and T-Rec at T40, T50, T60, compared to the baseline. In the MEC-group, the T-Tra and T-Oes was significantly lower at T30, T40, T50, T60, the T-Rec at T40, T50, T60, compared to the baseline. In the SPO-group, the fR was significantly lower for all the times and the ETCO2 higher at T10, T20, T30, T40, T50 compared to the MEC-group. No other differences were detected. During anaesthesia, there is a comparable decrease in body temperatures, regardless of whether the dogs are breathing spontaneously or ventilated mechanically.

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A Comparison of the Effects of Lung Protective Ventilation and Conventional Ventilation on Thermoregulation During Anaesthesia

Cited by 4 publications

References 20 publications

Can Mechanical Power be Used as a Safety Precaution in Pediatric Patients?

Can Mechanical Power be Used as a Safety Precaution in Pediatric Patients?

The Effect of Sevoflurane Low-Flow Anesthesia on Preserving Patient Core Temperature

Changes in tracheal, oesophageal and rectal temperature over 60 minutes anaesthesia in non-heated dogs, spontaneously breathing or mechanically ventilated

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