Indian Journal of Anaesthesia最新文献

Background and aims: The dynamic needle tip positioning (DNTP) technique has recently been introduced, but the effectiveness of the DNTP and traditional palpation methods for radial artery cannulation remains unknown. Therefore, we conducted a systematic review and meta-analysis of randomised controlled trials (RCTs) to compare the effectiveness and safety of ultrasound-guided DNTP and palpation techniques during radial artery cannulation in patients undergoing elective surgery.

Methods: We conducted a thorough search of electronic databases from inception through 31 January 2025 to identify relevant studies. We searched PubMed, Embase, Cochrane Library, and Web of Science and identify relevant studies. RCTs comparing US-guided DNTP versus the palpation method in all age groups requiring radial artery cannulation were included. The primary outcome was the first attempt success rate. Secondary outcomes included overall success rate, cannulation time, and incidence of complications. Statistical analysis was performed using RevMan software.

Results: A total of six studies with 388 participants were included. Our meta-analysis showed a higher first-pass success rate in the DNTP group compared to the palpation group (Risk Ratio = 1.44; 95% Confidence Interval: 1.19, 1.73). We also observed a higher overall success rate in the DNTP group. Cannulation times were similar between the two groups. Meta-analysis indicated a lower complication rate in the DNTP group compared to the palpation group.

Conclusion: This meta-analysis showed a higher first-pass success rate and overall success rate and fewer complications in the DNTP group compared to the traditional palpation group during radial artery cannulation. Additionally, there was no significant difference in cannulation time between the two groups.

Background and aims: Thoracic continuous spinal anaesthesia (TCSA) avoids airway instrumentation and mechanical ventilation and may provide better postoperative pulmonary outcomes compared to general anaesthesia (GA) with thoracic epidural analgesia (TEA) for patients requiring laparotomy. The study compared postoperative pulmonary functions and outcomes between these two anaesthesia techniques.

Methods: Sixty adults were randomly assigned to Group GA+TEA or Group TCSA. In Group GA+TEA, the TEA was secured through the T9-T10 level, followed by GA. A 25-G catheter was placed at the same level in Group TCSA, and they received all preservative-free drugs (0.5% plain bupivacaine with 0.25 mg/kg ketamine and 0.03 mg/kg midazolam) to achieve a sensory block from T4 to L1. The primary outcome assessed was peak expiratory flow rate (PEFR) over the 72 h postoperative period. The secondary outcomes assessed were breath-holding time (BHT), lung atelectasis, and change in transdiaphragmatic excursion. The two-sided Student t-test, Mann-Whitney test, and Chi-squared test were used to analyse the data.

Results: The PEFR was reduced in both groups from baseline (P < 0.001), with no difference between them (P = 0.498). However, Group TCSA showed significantly better outcomes concerning BHT on postoperative days (POD) 1 and 2 (P = 0.048 and P = 0.005, respectively), reduced lung atelectasis at 1 h postoperatively (P = 0.03), and greater diaphragmatic excursion at 1 h, POD 1 and 2 (P < 0.001).

Conclusion: In patients undergoing major abdominal surgery, the PEFRs during the postoperative period were comparable for GA with thoracic epidural versus thoracic continuous spinal anaesthesia.

The All India Difficult Airway Association (AIDAA) methodology document describes the guideline development process and methodology employed for the AIDAA 2025 Guidelines for the management of unanticipated difficult airway in adults, obstetrics, and paediatrics and the management of at-risk extubations. The process for constituting the Steering Committee and Guideline Subcommittees and managing conflicts is described. Patients or Population-Intervention-Comparison-Outcome (PICO) questions were formulated for the respective guidelines. A systematic literature search was performed by a librarian from January 2000 to December 2024. A PRISMA flowchart describing the search process was prepared for each research question. The evidence was summarised and recommendations categorised according to the American Heart Association (AHA) Class of Recommendations and Level of Evidence for clinical strategies, interventions, treatments, or diagnostic testing in patient care. In addition, a Delphi process was conducted by the Steering Committee and a Delphi methodologist to achieve consensus among 24 airway experts for the clinical research questions using Delphi methodology, where the evidence was either lacking or weak. The Steering Committee coordinated the iterative Delphi rounds and refrained from participating in the voting process to prevent potential bias. The Delphi survey results were reported based on the Accurate Consensus Reporting Document (ACCORD) Guidelines. Consensus was established when 75% or more of panellists selected the same option(s) in multiple-choice statements and the seven-point Likert scale statements. Expert consensus statements were drafted from the survey statements that achieved consensus. A plan for guideline dissemination, promotion, integration into clinical practice and revision has also been included.

The All India Difficult Airway Association developed clinical practice statements utilising the Delphi method among experts for specific interventions in the management of unanticipated difficult airways in adult, obstetric, and paediatric populations, as well as for the management of at-risk extubations, where existing evidence was either weak or absent. A Steering Committee consisting of nine airway experts and a Delphi methodologist convened a panel of 24 experts, from whom anonymous responses were collected via an online Delphi survey. Consensus was defined as at least 75% experts voting for a particular option in multiple-choice statements, and agreement (scores of 5-7) or disagreement (scores of 1-3) on a nominal 7-point Likert scale statement. The stability of responses between consecutive rounds was assessed using the Kruskal-Wallis test or Chi-square test, with a P value of greater than or equal to 0.05 indicating stability. Twenty-three experts completed four Delphi rounds conducted from 27 December 2024 to 25 January 2025. Of the 26 statements considered, 23 (88%) achieved both consensus and stability. Of note, the statement regarding the maximum number of attempts permitted for supraglottic airway insertion in adults to mitigate airway management-related complications did not achieve consensus among experts; however, the Steering Committee voted unanimously for a maximum of three attempts. From the 23 statements that achieved expert consensus and the statement that received the maximum vote during the adjudication process by the Steering Committee, 24 expert clinical statements were drafted. Future research is necessary to evaluate the impact of these clinical practice statements and to address the remaining uncertainties.

The paediatric airway differs from the adult airway both anatomically and physiologically. These guidelines are recommended for use in unanticipated difficult airways in children aged 1-12 years. If the initial intubation attempt fails, the anaesthesia team should "Call for help" (Code D) and prioritise providing oxygen to maintain peripheral oxygen saturation (SpO₂) above 95%. While awaiting help, the anaesthesia team may re-attempt tracheal intubation, this time by a more experienced operator, after reoptimising position and considering alternate airway devices. The anaesthesiologist may opt for a 2^nd generation supraglottic airway (SGA) device as a rescue device or continue the anaesthetic using a face mask (FM). Maintaining oxygenation throughout the period is essential. The current guidelines introduce a circular design for the algorithm, allowing device interchangeability. If satisfactory oxygenation is achieved with either a 2^nd generation SGA device or FM, the decision to continue anaesthesia or wake the child will depend on the urgency of the procedure and the comfort of the anaesthesiologist. If satisfactory ventilation cannot be maintained with a 2^nd generation SGA device or FM or following a failed tracheal intubation, declare "complete ventilation failure" and prepare for an emergency surgical airway. The options for emergency surgical airway depend on the availability of trained surgical help and the age of the child. Post-resuscitation care should address the various steps taken to return the child to normalcy and to discharge. This should include giving an "Airway Alert Card" to the parents to avoid similar life-threatening situations in future.

Background and aims: Supraglottic airway devices (SADs), such as the i-gel^®, are widely used during general anaesthesia but are susceptible to intraoperative displacement. Although clinical methods are commonly employed for confirming placement, they may be unreliable in identifying malposition. Video bronchoscopy (VB) is the gold standard for confirmation of proper SAD placement, but its use is limited by both cost and availability. Ultrasonography (US) is a non-invasive and cost-effective yet underutilised alternative. This study aimed to evaluate the efficacy of US in detecting I-gel^® placement compared with VB.

Methods: In this prospective observational study, 155 female patients undergoing general anaesthesia were assessed. Pre- and post-I-gel^® insertion glottic images were obtained using US, followed by VB to determine I-gel^® positioning. Post I-gel^® insertion US images were graded based on asymmetrical arytenoid cartilage elevation (0-3 scale) relative to the glottic midline and contralateral arytenoid. These grades were then correlated with VB-assessed I-gel^® position and rotation status.

Results: US detected arytenoid displacement in 27% of cases. VB revealed I-gel^® rotation in 63% and malposition in 21.9%. The sensitivity of US in detecting correctly positioned I-gel^® was 77.69% [95% confidence interval (CI): 69.22, 84.75], with a positive predictive value (PPV) of 83.19% (95% CI: 74.99, 89.56). For identifying non-rotated I-gel^®, US showed a sensitivity of 91.07% (95% CI: 80.38, 97.04) but a lower PPV of 45.13% (95% CI: 35.75, 54.77).

Conclusion: US is effective in detecting I-gel^® displacement, but its ability to distinguish malposition from rotation is limited. VB remains the definitive modality for confirming accurate SAD positioning.