P5. Face Tissue Pressure in Prone Positioning: A Comparison of Three Face Pillows While in the Prone Position for Spinal Surgery

Context: Postural change during anaesthesia has a complex effect on systemic and cerebral circulations. Aim: The goal of the study was to evaluate the effects of desflurane and propofol on cerebral oxygenation during spinal surgery in the prone position. Settings and Design: A prospective randomized double-blinded trial. Methods and Materials: Fifty-two patients scheduled for spinal surgery were randomly allocated to propofol (n=25) and desflurane (n=27) groups. Anaesthetic agents were maintained to obtain a bispectral index of 50-55. SAP, DAP, HR, SPO2, ETCO2 and right and left rSO2 were assessed at seven-time points: supine position without oxygen administration (T1), supine position with oxygen administration (T2-baseline), intubation in the supine position (T3), just after prone positioning (T4), 10 minutes after prone positioning (T5), at the end of surgery in the prone position (T6) and at the end of anaesthesia in the supine position (T7). PCO2, PO2 and Hb partial were also recorded at T3 and T7. Results: Demographic data, pre-oxygenation hemodynamic variables and rSO2 were comparable between the groups. There was no significant difference between groups in SAP, DAP, HR, SPO2, and ETCO2 (p=0.095, p=0.061, p=0.357, p=0.088, p=0.328 respectively). PCO2, PO2 and Hb were not significant different between groups (p=0.542, p=0.394, p=0.768 respectively). rSO2 values were not significantly different between groups. In the propofol group, right rSO2 was significantly higher at T3 (p=0.017) and significantly lower at T5 (p=0,019) and at T6 (p=0,028) compared to baseline. Left rSO2 decreased significantly from baseline at T5 (p=0.026) in the propofol group. Left and right rSO2 in the desflurane group decreased significantly from baseline at T5 (p=0.0004 and p=0.0115). Conclusion: In the prone position, desflurane and propofol were associated with a significant decrease in rSO2 without differences between these anaesthetics.

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Perioperative Goal Directed Therapy (PGDT) in Spinal Surgery in the Prone Position

Case Medical Research ◽

10.31525/ct1-nct04025086 ◽

2019 ◽

Author(s):

Keyword(s):

Prone Position ◽

Spinal Surgery ◽

Goal Directed Therapy

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Standard Care Versus Awake Prone Position in Adult Nonintubated Patients With Acute Hypoxemic Respiratory Failure Secondary to COVID-19 Infection—A Multicenter Feasibility Randomized Controlled Trial

Journal of Intensive Care Medicine ◽

10.1177/08850666211014480 ◽

2021 ◽

pp. 088506662110144

Author(s):

Devachandran Jayakumar ◽

Pratheema Ramachandran, DNB ◽

Ebenezer Rabindrarajan, DNB ◽

Bharath Kumar Tirupakuzhi Vijayaraghavan, MD ◽

Nagarajan Ramakrishnan, AB ◽

...

Keyword(s):

Respiratory Failure ◽

Prone Position ◽

Feasibility Study ◽

Standard Care ◽

Controlled Trial ◽

Prone Positioning ◽

Hypoxemic Respiratory Failure ◽

Randomized Controlled ◽

Significant Difference ◽

Hypoxic Respiratory Failure

Rationale: The feasibility and safety of awake prone positioning and its impact on outcomes in non-intubated patients with acute respiratory distress syndrome secondary to COVID-19 is unknown. Results of the observational studies published during this pandemic have been conflicting. In this context, we conducted a multi-center, parallel group, randomized controlled feasibility study on awake prone positioning in non-intubated patients with COVID-19 pneumonia requiring supplemental oxygen. Methods: 60 patients with acute hypoxic respiratory failure secondary to COVID-19 pneumonia requiring 4 or more liters of oxygen to maintain a saturation of ≥92% were recruited in this study. Thirty patients each were randomized to either standard care or awake prone group. Patients randomized to the prone group were encouraged to self-prone for at least 6 hours a day. The primary outcome was the proportion of patients adhering to the protocol in each group. Results: In the prone group, 43% (13 out of 30) of patients were able to self-prone for 6 or more hours a day. In the supine group, 47% (14 out of 30) were completely supine and 53% spent some hours in the prone position, but none exceeded 6 hours. There was no significant difference in any of the secondary outcomes between the 2 groups and there were no adverse events. Conclusions: Awake prone positioning in non-intubated patients with acute hypoxic respiratory failure is feasible and safe under clinical trial conditions. The results of our feasibility study will potentially help in the design of larger definitive trials to address this key knowledge gap.

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The effect on respiratory mechanics when using a Jackson surgical table in the prone position during spinal surgery

Korean Journal of Anesthesiology ◽

10.4097/kjae.2010.59.5.323 ◽

2010 ◽

Vol 59 (5) ◽

pp. 323 ◽

Cited By ~ 16

Author(s):

Yoontae Nam ◽

Ann Misun Yoon ◽

Yoon Hee Kim ◽

Seok Hwa Yoon

Keyword(s):

Prone Position ◽

Spinal Surgery ◽

Respiratory Mechanics

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High-Flow Nasal Cannula and Prone Positioning in Awake Patients with COVID-19 Related Respiratory Failure: An Observational Study.

10.21203/rs.3.rs-1023023/v1 ◽

2021 ◽

Author(s):

Fekri Abroug ◽

Zeineb Hammouda ◽

Manel Lahmar ◽

Wiem Nouira ◽

Syrine Maatouk ◽

...

Keyword(s):

Logistic Regression ◽

Observational Study ◽

Prone Position ◽

Supine Position ◽

Early Response ◽

High Flow ◽

Nasal Cannula ◽

Youden Index ◽

Prone Positioning ◽

High Flow Nasal Cannula

Abstract Background: We report an observational study on the use of High-flow nasal cannula (HFNC) and awake prone position in patients with Covid-19 related severe ARF.Methods: chart analysis of consecutive patients with confirmed Covid-19 and severe ARF (PaO2/FiO2 ratio <150) who received HFNC. Patients were systematically encouraged to lie in the prone position if tolerated. We calculated initial ROX index (the ratio of SpO2/FIO2 to respiratory rate) while in supine position and at the end of the first HFNC session whether in prone or supine position, and their difference (delta ROX). The success/failure of HFNC (need for intubation) was recorded. Predictors of HFNC failure were identified using ROC curve and logistic regression.Results: HFNC was administered to 213 out of 360 patients with COVID-19 related severe ARF (71% male, median age:59 years (IQR:50-68), median PaO2/FIO2: 104(73-143). At the start of HFNC, median ROX index was 4(3.4-5). Among included patients, 178 (83.5%) could tolerate prone position and had a median of 4.4(2-6) prone sessions during a median of 10(4-16) hours/day each, for a median of 4(2-7) days. Overall, HFNC failure occurred in 61 patients (28.1%) with similar proportions in patients who had HFNC in prone position and in patients who did not tolerate prone position (29% and 26%, respectively; relative risk:1.14. 95%CI:0.62-2.1). In the prediction of HFNC outcome, AUC was highest for delta ROX (AUC=0.83); AUC for baseline ROX (0.71), PaO2/FiO2 (0.73), and SpO2 (0.67), were significantly lower. The delta ROX cut-off ≤1.8 had the best Youden index indicating the best combination of sensitivity (0.89) and specificity (0.61) with a PLR (2.33) and a NLR (0.17) to predict HFNC failure. Logistic regression disclosed the following predictors of HFNC failure: delta ROX: RR=0.44, 95%CI=0.32-0.62; p-0.0001); baseline ROX index: RR=0.58, 95% CI:0.39-0.85, p=0.005); SOFA score (RR=1.6 for each point; 95%CI: 1.1-2.2, p=0.007); and PaO2/FiO2 at admission: RR=0.96, 95%CI=0.94-0.99). Prone position was not related to HFNC success.CONCLUSION: Awake HFNC in prone position is feasible in most patients with severe hypoxemic COVID-19. Indicators of ARF severity and the early response to HFNC, rather than prone position are independently associated with HFNC outcome.

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Awake Prone Position in Hypoxemic Patients with Coronavirus Disease 19 (COVI-PRONE): A Study protocol and Statistical Analysis Plan for Randomized Clinical Trial

10.1101/2021.08.06.21261531 ◽

2021 ◽

Author(s):

Zainab Al Duhailib ◽

Yaseen Arabi ◽

Sarah Culgin ◽

Jason Weatherald ◽

Ken Kuljit S. Parhar ◽

...

Keyword(s):

Mechanical Ventilation ◽

Prone Position ◽

Controlled Trial ◽

Invasive Mechanical Ventilation ◽

Target Population ◽

Altered Mental Status ◽

Hemodynamic Instability ◽

Hospital Length Of Stay ◽

Prone Positioning ◽

Serious Adverse Events

Background Coronavirus disease 2019 (COVID-19), may progress to respiratory failure requiring invasive mechanical ventilation. Due to ventilator shortage and healthcare systems strain, affordable interventions such as awake prone positioning has been used to improve oxygenation, however, the effect of this intervention on patient-important outcomes is uncertain. The COVI-PRONE trial aims to determine if awake prone positioning in hypoxemic COVID-19 patients reduces the need for invasive mechanical ventilation. Study design A pragmatic, multicenter, international, parallel-group, and stratified randomized controlled trial, aiming to enrol 400 hospitalized adults with COVID-19. Participants The target population is hospitalized adults with confirmed or suspected COVID-19, hypoxemia that requires ≥40% oxygen or ≥ 5 L/min by nasal cannula, and abnormal chest x-ray. We will exclude patients with any of the following: immediate need for intubation; altered mental status; contraindication to prone positioning; hemodynamic instability; body mass index > 40 kg/m2; third trimester pregnancy; do not intubate status; previous enrolment or intubation within the same hospital admission; and prone positioning for more than one day prior to randomization. Study intervention and control Following informed a priori or deferred consent, eligible patients will be centrally randomized to either the intervention arm (prone positioning) or standard of care (no prone positioning). Patients randomized to the prone position will be required to either self-prone or assist-prone for a total of eight to ten hours per day until they meet pre-specified stopping criteria. Study outcomes The primary outcome is invasive mechanical ventilation at 30-days of randomization. Other outcomes include mortality at 60 days, invasive and non-invasive mechanical ventilation free days at 30 days, hospital length of stay at 60 days, days alive and outside of the hospital at 60 days, complications of proning, and serious adverse events.

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Analisis Penambahan Dexmedetomidine pada Operasi Besar Tulang Belakang Elektif di RSUD Dr. Soetomo

Jurnal Neuroanestesi Indonesia ◽

10.24244/jni.v9i2.225 ◽

2020 ◽

Vol 9 (2) ◽

pp. 78-86

Author(s):

Putri Rizkiya ◽

Nancy Margarita Rehatta ◽

Bambang Harijono ◽

Lilik Herawati

Keyword(s):

Mean Arterial Pressure ◽

Arterial Pressure ◽

Cortisol Level ◽

Pulse Rate ◽

Spinal Surgery ◽

Recovery Time ◽

Controlled Study ◽

Prone Positioning ◽

Endocrine Response ◽

Inhalational Anesthesia

Latar Belakang dan Tujuan: Dexmedetomidine (DEX) suatu agonis α2, telah banyak digunakan untuk mengendalikan respon stress pembedahan melalui penekanan respon simpatis dan endokrin. Studi ini bertujuan untuk menganalisis efek penambahan dexmedetomidine terhadap kadar kortisol, nadi, tekanan arteri rerata, kebutuhan penggunaan fentanyl dan isoflurane pada operasi tulang belakang.Metode: Sebuah studi randomisasi terkontrol tersamar ganda dilakukan pada pasien yang menjalani operasi besar tulang belakang elektif di RSUD Dr. Soetomo, Surabaya. Nadi, tekanan arteri rerata, kebutuhan fentanyl dan isoflurane serta perubahan kadar kortisol pre dan post-operatif dibandingkan antara pasien yang memperoleh dexmedetomidine (DEX) dan placebo (SAL).Hasil: Nadi dan tekanan arteri rerata lebih stabil pada kelompok DEX pada saat intubasi, prone positioning dan insisi. Perubahan kadar kortisol pada kelompok DEX (9,9±5,2 mcg/dl) lebih rendah dibanding kelompok SAL (11.7±8.4 mcg/dl) namun tidak berbeda bermakna secara statistik (p=0.88). Penggunaan fentanyl dan isofluran pada kelompok DEX dapat dikurangi masing-masing 50% (p=0,00) dan 30% (p=0,00). Kecepatan pulih sadar kelompok DEX lebih cepat. (p=0,001) Simpulan: Hemodinamik yang stabil, berkurangnya penggunaan opioid dan anestesi inhalasi serta proses pulih sadar yang lebih cepat pada kelompok DEX mendukung penggunaan dexmedetomidine dalam operasi besar tulang belakang. Analysis of Dexmedetomidine Addition in Elective Major Spinal Surgery in RSUD Dr. SoetomoAbstractBackground and Objective: Dexmedetomidine (DEX) an α2 agonist, is widely used to control stress response during surgery through inhibition of sympathetic and endocrine response. This study aims to analyze the effect of dexmedetomidine addition towards blood cortisol level, pulse rate, mean arterial pressure, and fentanyl and isoflurane use during major spinal surgery.Method: A randomized doubleblind controlled study was conducted on twenty patients undergoing major spinal surgery in RSUD dr. Soetomo, Surabaya. Pulse rate, mean arterial pressure, fentanyl and isoflurane used, and plasma cortisol changes were compared between patients receiving dexmedetomidine (DEX) and placebo (SAL). Results: Pulse rate and mean arterial pressure was more stable in DEX group during intubation, prone positioning and incision. Changes in cortisol level in DEX group (9.9±5.2 mcg/dl) was lower, but not statistically significant fromSAL group (11.7±8.4 mcg/dl,p=0.88). Fentanyl and isoflurane use in DEX group was reduced 50% (p=0.00) and 30% (p=0.00) respectively. Recovery time in DEX group was faster (p=0.001).Conclusion: Hemodinamik stability, reduced opioid and inhalational anesthesia use, and faster anesthesia recovery time supports dexmedetomidine as anadjunct in general anesthesia in major spinal surgery.

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