Endotracheal Tube Cuff Pressure Research Articles

The evaluation of endotracheal tube cuff pressure in pediatric patients by subjective inflation techniques: a prospective observational study.

Cuffed endotracheal tubes (ETTs) are commonly used in pediatric patients, with the gold standard for measuring cuff pressure being a cuff pressure manometer. However, this equipment is not always available in every operating room. Subjective inflation techniques, such as the minimal occluding volume (MOV) technique and the stethoscope-guided (Steth) technique, offer convenient and safe alternatives to standard methods but do not provide quantitative measurements. This study aimed to evaluate ETT cuff pressures and volumes of air inflated using the two subjective techniques (MOV and Steth) in pediatric patients. This prospective observational study was conducted at the Department of Anesthesiology, Faculty of Medicine, Khon Kaen University, Thailand. We included healthy pediatric patients aged 2 to 7 years undergoing elective surgeries under general anesthesia with a cuffed ETT. The primary objective of this study was to compare the mean ETT cuff pressures and volumes of air inflated using the two subjective inflation techniques (MOV and Steth method). The secondary objectives include identifying factors associated with inappropriate inflation and evaluating post-intubation complications. Sixty-four pediatric patients were analyzed. The overall mean ETT cuff pressure was 26.52 ± 8.68 cmH2O. The target was achieved in 46.88% of patients, with overinflation in 32.81% and underinflation in 20.31%. The mean ETT cuff pressure in the MOV group was 27.77 ± 8.89 cmH2O and in the Steth group was 25.33 ± 8.34 cmH2O, with a non-significant mean difference of 2.44 cmH2O (95% CI [-1.89, 6.77], p = 0.264). The mean volume of air inflated in the MOV group was 0.78 ± 0.25ml, and in the Steth group was 0.68 ± 0.22ml, with a non-significant mean difference of 0.10ml (95% CI [-0.01, 0.22], p = 0.084). Younger age, lower weight, and shorter height were significantly associated with an increased risk of overinflation. An ETT size with an internal diameter (ID) of 5mm was significantly associated with an increased risk of underinflation. No post-intubation complications were reported. Subjective inflation techniques (MOV or Steth) achieve target ETT cuff pressures in less than 50%, and carry the risks of both overinflation and underinflation,even without post-intubation complications. TCTR20211016001 (registered with the Thai Clinical Trials Registry on October 16, 2021).

Management of adult mechanically ventilated patients: A UK-wide survey

Background: Mechanical ventilation is a common and often lifesaving intervention that is utilised in intensive care. However, the practices can vary between centres. Through this national survey we aim to gain more information about different strategies adopted across the UK. Methods: All adult intensive care units in the UK were approached to participate. The questionnaire was developed with an electronic survey engine and conducted between 09/11/2023 and 01/04/2024 (Survey Monkey®). The survey included questions on ventilator modes, settings, protocols/pathways, rescue strategies, immediate post-extubation period and follow-up. Results: There were 196 responses from 104 hospitals. The most widely adopted start-up ventilation mode was pressure-regulated volume-controlled mode. For acute hypoxaemic respiratory failure (AHRF), most of respondents reported full (39.8%) or partial compliance (58.1%) with the ARDSnet protocol, with PEEP settings being the commonest deviation. Prone positioning (99.0%), followed by recruitment manoeuvres (91.3%) were commonly used rescue measures during AHRF. APRV (55.7%), inhaled (51.3%) and systemic pulmonary vasodilators (44.1%) were also commonly used. Conservative oxygen targets (SaO2 of 88%–92%) were commonly adopted (70.6%). As a care bundle, intermittent ETT cuff pressure monitoring was more common (65.5%) than continuous cuff pressure monitoring (20.0%). Propofol and alfentanil were the most common initial sedative and analgesia (99.5% and 56.9%) respectively. Routine volatile anaesthetic use was rare. Conclusions: Our survey has shown significant variation of practice in common but crucial elements of management of patients receiving mechanical ventilation. We hope the results in our survey highlight potential future areas of research. Collaborators South-coast Peri-operative Audit and Research Collaborative (SPARC) Severn Trainee Anaesthetic and Critical Care Research group (STAR) Collaborative research in Anaesthesia in the Northeast (CRANE)

Evaluation of ventilator-associated pneumonia care practice in the intensive care units of a comprehensive specialized hospital in Northwest Ethiopia: a 1.5-year prospective observational study.

Nosocomial infections pose a global health threat, with Ventilator-Associated Pneumonia (VAP) emerging as a prominent hospital-acquired infection, particularly in intensive care units (ICU).VAP is the commonest form of pneumonia in ICUs, contributing significantly to morbidity and mortality rates, which can reach around 30%. Despite the substantial impact of VAP on healthcare, there is a lack of data on adherence to VAP prevention protocols in our hospital. Consequently, this study aims to assess the adherence to ventilator-associated pneumonia care bundles in critical care units at a comprehensive specialized hospital in northwest Ethiopia. A hospital-based prospective observational study was conducted from July 3, 2022, to January 7, 2024. All adult patients who were on mechanical ventilators for more than 48h during the study period were included. Data were collected using the Institute of Healthcare Improvement VAP prevention standards as checklists via direct observation and chart review. The data were entered and analyzed using SPSS version 20. A total of 300 surgical and medical ICU patients were observed. Among the patients, 66.3% were from the medical ICU. In terms of admission reasons, 22.3%, 15.7% and, 12% were attributed to infections excluding respiratory origin, respiratory disorders, and other causes, respectively. The rate of compliance with all components of the bundle was 70%. A 100% adherence rate was observed for the prophylaxis for peptic ulcer and deep vein thrombosis (DVT). The lowest adherence rate was observed in the practice of oral hygiene with 0.5% chlorhexidine solution (0%) followed by humidification with heat and moisture exchangers (23.3%). Endotracheal tube cuff pressure measurement and use of endotracheal tubes with subglottic suction were not applicable. The study revealed suboptimal compliance with the VAP care bundle, indicating unsatisfactory overall practice. Specific attention is warranted for subglottic suction, cuff pressure measurement, humidification, oral care with chlorhexidine, and sedation vacation.

Optimizing patient safety: Unveiling the significance of cuff pressure in anaesthesia

BackgroundInadequate pressure in the endotracheal tube (ETT) cuff can lead to compromised ventilation or airway injury. Accurate assessment of ETT cuff pressure is essential and should be performed using a manometer, with an optimal target range of 20–30 cmH2O. AimIn this study, we aimed to audit ETT cuff pressures in the operating theatre of our institution, utilizing a manometer from VBM Medizintechnik GmbH™. MethodsFollowing approval from the ethics committee, we conducted an audit from January 2023 to November 2023. A convenience sample was utilized, including adult patients who were intubated in our operating rooms (ORs) during either the morning or afternoon shifts at the time of the audit. ResultsA total of 49 patients were evaluated. Our findings revealed that 78 % of the patients had cuff pressures outside the recommended target range, with recorded pressures ranging from 18 cmH2O to 120 cmH2O, and a mean pressure of 63 cmH2O. Nitrous oxide was not used in any of the cases. Cuff inflation was performed using different syringe volumes: a 5 mL syringe was used in one case, a 10 mL syringe in 20 cases, and a 20 mL syringe in 28 cases, with a mean inflation volume of 9 mL. Statistical analysis indicated no significant difference in ETT cuff pressure related to the type of syringe used or the size of the endotracheal tube. Additionally, no correlation was found between the volume of air used for cuff inflation and the resulting ETT cuff pressure. ConclusionOur audit revealed that only 22 % of the patients had cuff pressures within the recommended limits, highlighting a significant need for increased awareness and education. As maintaining appropriate cuff pressure is a standard of care, systematic implementation of reliable cuff pressure monitoring is strongly recommended.

Decreasing the pressure of endotracheal tube cuff slowly with a constant speed can decrease coughing incidence during extubation: a randomized clinical trial

BackgroundTo discuss whether decreasing the pressure of endotracheal tube cuff slowly with a constant speed can decrease the incidence of coughing during extubation.MethodsNinety patients undergoing elective noncardiac surgery under general anesthesia with endotracheal intubation were randomly divided into two groups: group P, the pilot balloon was connected to a syringe and an aneroid manometer through a three-way stopcock, respectively, and the decrease of cuff pressure was controlled at 3 cmH2O/s during deflating before extubation; group C, the pressure in endotracheal tube cuff was decreased suddenly with a syringe extracting the air from the cuff rapidly at once exactly before extubation. The incidence of coughing during extubation period was recorded. Mean arterial pressure (MAP) and heart rate (HR) were recorded before general anesthesia induction (T0), just before cuff deflation (T1), immediately after deflation (T2), at 1 min (T3), 3 min (T4), and 5 min after extubation (T5). The occurrence of adverse reactions was also recorded.ResultsThe initiation of coughing during extubation period occurs at immediately the time of balloon deflation. Compared with group C, the incidence of coughing was significantly decreased (P = 0.001), MAP and HR were significantly decreased at T2-T4 and T2-T5, respectively (P < 0.05 for all), and the incidence of pharyngolaryngeal discomfort after extubation was significantly reduced (P = 0.021) in group P.ConclusionsDecreasing the pressure of endotracheal tube cuff slowly with a constant speed can significantly reduce the incidence of coughing during extubating period, stabilize hemodynamics, and reduce the incidence of adverse reactions.

Effect of different patient positions on endotracheal tube cuff pressure in patients undergoing urological procedures: a prospective study.

The endotracheal tube (ETT) contains a cuff that is placed in the trachea to prevent gas leakage and aspiration of secretions and gastric contents. However, patient positioning after intubation may cause ETT displacement and changes in cuff pressure. Evaluate the effect of different patient positions on ETT cuff pressure in patients undergoing urological procedures in supine, prone, lateral flank, and lithotomy positions. Prospective and observational study. A university hospital in Turkey. Patients who underwent surgeries under general anesthesia in different patient positions were involved. After intubation (T0), the cuff pressure was checked with a manometer and adjusted to 25 cmH2O and continuously monitored. The cuff pressure was checked before (T1) and after achieving the final position (T2) and then at 5, (T3), 10, (T4), 15 minutes (T5) of the position, at the end of the procedure (T6) and before extubation (T7). At postoperative 2nd and 12th hours, the patients were interviewed for sore throat, hoarseness, and cough. The effect of different patient positions on the ETT cuff pressure. 200 patients. The cuff pressure increased significantly at T2 in the lithotomy, lateral flank, and prone groups (P<.001 each). The highest increase in cuff pressure occurred in the prone group (34.3 [7.5] cmH2O). Over time, the cuff pressure decreased in all groups during surgery. Postoperative complications at the 2nd postoperative hour were similar in all groups; however, the mean cuff pressure was significantly higher in the patients with postoperative sore throat or cough (sore throat: P=.003; cough: P=.047). ETT cuff pressures are affected by different patient positioning; therefore, regular recording and adjustment of cuff pressure are necessary for patient safety. We used ETT of a single manufacturer. Therefore, our findings may not be applicable to other types of ETT.

Endotracheal Cuff Pressure in Different Positions in Patients Posted for Surgery under General Anaesthesia: An Observational Study

Background: The ideal endotracheal tube cuff pressure to prevent aspiration is 20-30cmH2O. Lower pressures will result in aspiration and high pressures will lead to tracheal mucosal injuries. Change in patient position may also lead to change in cuff pressures. Our study mainly aims at measuring the cuff pressures in supine, Trendelenberg, reverse Trendelenberg, neck flexion and rotation to one side. Methods: This prospective observational study was conducted after obtaining ethical clearance and patient consent. 50 patients of ASA Classes I and II were included. All patients were intubated with Romson cuffed endotracheal tubes of size 7.5mm for females and 8.5mm for males. The cuff was inflated and cuff pressure set at 28cm H2O using CuffillsR syringe. With head in neutral position, cuff pressure was measured in 15 degree Trendelenberg and reverse Trendelenberg positions. Using angle meter app, the angles were fixed for flexion, extension, and rotation to one side at 30 degrees. The cuff pressure was recorded after 120 seconds after placing the patient in all these positions. Results: The cuff pressure increased by 12.48cm H2O flexion and the cuff pressure increased to 33.22cm H2O in extension. The cuff pressure increased to 38.10cmH2O on rotation, increased by 10.58cmH2O from neutral position in Trendelenberg position and increased by 8.74cmH2O in reverse Trendelenberg position. Conclusion: The cuff pressure changed significantly in all the positions.

Battle of the Gases: How Air and Nitrous Oxide Affect Endotracheal Tube Cuff Pressure During General Anesthesia.

Background Endotracheal tube (ETT) cuff pressure changes during general anesthesia. Endotracheal cuff pressure ideally should be maintained between 20 and 30 cm of H2O. Cuff pressure of less than 25 cm of H2O increases the chances of aspiration while pressure of more than 40 cm of H2O causes tracheal mucosa damage. The study aimed to monitor and compare variations of endotracheal cuff pressure during general anesthesia with oxygen-air or oxygen-nitrous oxide. Methods This prospective, randomized, double-blinded, observational study was conducted on 40 patients. After approval from the institutional ethics subcommittee, 40 patients of either gender, aged 18-60 years, belonging to ASA grades I and II, who were undergoing elective surgery under general anesthesia, were enrolled in this study. The patients were randomly divided into two groups, with 20 in each group. In Group A, oxygen-air and Group N, oxygen-nitrous oxide was used as a gaseous mixture in general anesthesia with ETT. The ETT cuff pressure was recorded with the help of a cuff manometer at intervals of five, 10, 20, 30, 40, 50, 60, 70, 80, and 90 minutes after intubation. If pressure was more than 40 cm of H2O, it was reduced to 25-30 cm of H2O. Data were collected and analyzed using methods described in Primer of Biostatistics by Stanton A. Glantz. Quantitative data were analyzed using the Student's t-test. Qualitative data were analyzed using the chi-square test. Results An increase in cuff pressure was noted more in Group N as compared to Group A. The pressure in the endotracheal cuff started to gradually increase after 30-40 minutes in Group N after intubation, while in Group A, there was no significant increase. The average number of times the cuff deflated was 0.2 ± 0.41 in Group A and 1.55 ± 0.51 in Group N, which was highly significant. Conclusion Changes in endotracheal cuff pressure were observed when using different gas mixtures for inflation. Specifically, cuff pressure increased with oxygen and nitrous oxide compared to oxygen with air. This suggests that anesthetic gas composition can impact cuff pressure, potentially affecting tracheal mucosal perfusion and patient safety. Therefore, regular monitoring and adjustment of cuff pressure is crucial, especially when using nitrous oxide, to prevent complications and ensure optimal patient care.

Tracheal Stenosis After Intubation and Tracheostomy in Patients Admitted to Intensive Care Units: A Case-Control Study

Background: One of the most dangerous complications after endotracheal intubation or tracheostomy is tracheal stenosis. Objectives: This study aimed to determine the personal and clinical characteristics of tracheal stenosis following intubation or tracheostomy in intensive care unit patients. Methods: This is a nested case-control study. Thirty-five patients who suffered from tracheal stenosis from March 2016 to March 2021 and had been intubated and tracheostomized in intensive care units (ICU) were selected for the case group. The control group included 105 patients intubated and tracheostomized in ICU during the same period without tracheal stenosis. A demographic and clinical characteristics questionnaire was used to collect data from the patients' medical records. Results: The mean length of intubation (P &lt; 0.001), endotracheal and tracheostomy tube cuff pressure (P &lt; 0.001), chronic obstructive pulmonary disease (COPD) (P = 0.043), intubation history (P = 0.045), and airway management (P &lt; 0.001) showed significant differences between the case and control groups. The logistic regression model revealed that COPD (OR = 8.519, P = 0.037), intubation history (OR = 3.939, P = 0.013), length of intubation (OR = 1.118, P = 0.003), age (OR = 0.960, P = 0.030), and endotracheal and tracheostomy tube cuff pressure (OR = 1.988, P &lt; 0.001) were associated with tracheal stenosis. The time interval between intubation/tracheostomy ranged from approximately 28 to 938 days. Conclusions: Given the impact of certain care practices during hospitalization on the occurrence of tracheal stenosis, such as the mean length of intubation, endotracheal and tracheostomy tube cuff pressure, and airway management, it is recommended that standardized training on these interventions be prioritized for staff in intensive care departments. Additionally, attention must be given to specific patient characteristics, such as age, COPD, and history of intubation.

The knowledge and skills of emergency department registered nursing staff at an academic hospital in South Africa, on endotracheal tube cuff manometry, before and after a training session

IntroductionAccurate management of endotracheal tube cuff pressure is essential to prevent patient morbidity and mortality. Due to increased length of stay of critically ill patients in emergency departments, it has become an increasingly important skill among Emergency Department nurses. MethodsThis prospective longitudinal interventional study was performed among registered nurses at the emergency departments in a Johannesburg Academic Hospital. The study aimed to determine their current knowledge and practical skills on endotracheal tube cuff manometry and assess the effectiveness of a training program. The training program was provided once, in the form of a narrated PowerPoint presentation developed by the researchers and involved theoretical and practical components. The participants' theoretical knowledge and practical skills were measured by using questionnaires and skill assessments. The theoretical and practical scores were compared pre- and post-training. ResultsOf the 63 registered nurses employed in the emergency departments, 95 % (60) participated in this study. 86 % reported having never received any formal training on endotracheal tube cuff manometry. Only 38.9 % used cuff manometry as standard practice and only 12.8 % checked it at appropriate 12-hourly intervals. The pre-training median score on theory was 4.5 (IQR=3.0) and improved to 7.0 (IQR=3.0) post-training. The maximum achievable score was 11 with a pre-training average of 41.8 % and post-training of 64.5 % (p = 0.001).The practical pre-training median score was 1.0 (IQR=8.0) and improved to 12.0 (IQR=2.0) post-training. The maximum achievable score was 12 with a pre-training average of 29.1 % and a post-training average of 93.3 % (p = 0.001). ConclusionThis study showed inadequate knowledge and skills on endotracheal cuff pressure manometry among registered nurses in the emergency department. It also correlates with other evidence that supports the need for ongoing training programs. Our training program led to significant improvement among participants in both knowledge and practical skills. This training program was well received by participants and deemed to be practice changing. The recommendation after this study will be for South African emergency units to consider using this study and training material as a guide for annual in-service training.

Risk factor evaluation of cuff pressure of >30 cmH2O to stop air leakage during mechanical ventilation: A prospective observational study.

The commonly recommended endotracheal tube cuff pressure is 20-30 cmH2O. However, some patients require a cuff pressure of >30 cmH2O to prevent air leakage. The study aims to determine the risk factors that contribute to the endotracheal tube cuff pressure of >30 cmH2O to prevent air leakage. A multi-centre prospective observational study. Eligible patients undergoing mechanical ventilation in the intensive care unit of three hospitals between March 2020 and July 2022 were included. The endotracheal tube cuff pressure to prevent air leakage was determined using the minimal occlusive volume technique. The patient demographics and clinical information were collected. A total of 284 patients were included. Among these patients, 55 (19.37%) patients required a cuff pressure of >30 cmH2O to prevent air leakage. The multivariate logistic regression results revealed that the surgical operation (odds ratio [OR]: 8.485, 95% confidence interval [CI]: 1.066-67.525, p = 0.043) was inversely associated with the endotracheal tube cuff pressure of >30 cmH2O, while the oral intubation route (OR: 0.127, 95% CI: 0.022-0.750, p = 0.023) and cuff inner diameter minus tracheal area (OR: 0.949, 95% CI: 0.933-0.966, p < 0.001) were negatively associated with the endotracheal tube cuff pressure of >30 cmH2O. Therefore, a significant number of patients require an endotracheal tube cuff pressure of ＞30 cmH2O to prevent air leakage. Several factors, including the surgical operation, intubation route, and difference between the cuff inner diameter and tracheal area at the T3 vertebra, should be considered when determining the appropriate cuff pressure during mechanical ventilation.

Effect of Body Position Changes on Endotracheal Tube Cuff Pressure Measurements for Mechanically Ventilated Patients

Effect of Body Position Changes on Endotracheal Tube Cuff Pressure Measurements for Mechanically Ventilated Patients

Effect of continuous measurement and adjustment of endotracheal tube cuff pressure on postoperative sore throat in patients undergoing gynecological laparoscopic surgery: a randomized controlled trial.

Postoperative sore throat (POST) is a common complication following endotracheal tube removal, and effective preventive strategies remain elusive. This trial aimed to determine whether actively regulating intraoperative cuff pressure below the tracheal capillary perfusion pressure threshold could effectively reduce POST incidence in patients undergoing gynecological laparoscopic procedures. This single-center, randomized controlled superiority trial allocated 60 patients scheduled for elective gynecological laparoscopic procedures into two groups: one designated for cuff pressure measurement and adjustment (CPMA) group, and a control group where only cuff pressure measurement was conducted without any subsequent adjustments. The primary outcome was POST incidence at rest within 24h post-extubation. Secondary outcomes included cough, hoarseness, postoperative nausea and vomiting (PONV) incidence, and post-extubation pain severity. The incidence of sore throat at rest within 24h after extubation in the CPMA group was lower than in the control group, meeting the criteria for statistically significant superiority based on a one-sided test (3.3% vs. 26.7%, P < 0.025). No statistically significant differences were observed in cough, hoarseness, or pain scores within 24h post-extubation between the two groups. However, the CPMA group had a higher incidence of PONV compared to the control group. Additionally, the control group reported higher sore throat severity scores within 24h post-extubation. Continuous monitoring and maintenance of tracheal tube cuff pressure at 18 mmHg were superior to merely monitoring without adjustment, effectively reducing the incidence of POST during quiet within 24h after tracheal tube removal in gynecological laparoscopic surgery patients. The study was registered at www.chictr.org.cn (ChiCTR2200064792) on 18/10/2022.

Investigating Different Endotracheal Tube Cuff Pressure Monitoring Methods and their Role in Postoperative Sore Throat among Tracheal Intubation Patients: A Randomized Study

Investigating Different Endotracheal Tube Cuff Pressure Monitoring Methods and their Role in Postoperative Sore Throat among Tracheal Intubation Patients: A Randomized Study

Leveraging artificial intelligence to identify high-risk patients for postoperative sore throat: An observational study.

Postoperative sore throat (POST) is a prevalent complication after general anesthesia and targeting high-risk patients helps in its prevention. This study developed and validated a machine learning model to predict POST. A total number of 834 patients who underwent general anesthesia with endotracheal intubation were included in this study. Data from a cohort of 685 patients was used for model development and validation, while a cohort of 149 patients served for external validation. The prediction performance of random forest (RF), neural network (NN), and extreme gradient boosting (XGBoost) models was compared using comprehensive performance metrics. The Local Interpretable Model-Agnostic Explanations (LIME) methods elucidated the best-performing model. POST incidences across training, validation, and testing cohorts were 41.7%, 38.4%, and 36.2%, respectively. Five predictors were age, sex, endotracheal tube cuff pressure, endotracheal tube insertion depth, and the time interval between extubation and the first drinking of water after extubation. After incorporating these variables, the NN model demonstrated superior generalization capabilities in predicting POST when compared to the XGBoost and RF models in external validation, achieving an area under the receiver operating characteristic curve (AUROC) of 0.81 (95% CI 0.74-0.89) and a precision-recall curve (AUPRC) of 0.77 (95% CI 0.66-0.86). The model also showed good calibration and clinical usage values. The NN model outperforms the XGBoost and RF models in predicting POST, with potential applications in the healthcare industry for reducing the incidence of this common postoperative complication.

Differences in Effectiveness Between Measuring Cuff ETT Using a Syringe and Cuff Inflator on Oxygen Saturation in Pneumonia Patients in the ICU

Inaccuracy of ETT cuff pressure in intubated pneumonia patients will affect changes in oxygen saturation, so it is necessary to measure ETT cuff pressure using appropriate techniques. This study aims to analyze the difference in effectiveness between ETT cuff measurements using a syringe and an inflator cuff on oxygen saturation values in pneumonia patients. Comparative observational design with a cross sectional approach . There were 30 respondents using a total sampling technique, which were then distributed into 2 groups, namely the cuff inflator group and the syringe group with 15 patients each. Data were collected using observation sheets for ETT cuff measurements and oxygen saturation . The results of the Pearson statistical test analysis on ETT cuff measurements measured using a cuff inflator (p=0.01) and a syringe (p=0.004), both showed a p value &lt;0.05, which means there is a significant correlation with the oxygen saturation value. The results of the difference test using the independent t test for the saturation value carried out by measuring the ETT cuff using a cuff inflator using a syringe showed that p=0.854 (&gt;0.05 ) which means there is no difference. The conclusion of this research is that there is no difference between the saturation values of respondents who were measured using the ETT cuff using a cuff inflator and using a syringe. It is recommended that nurses increase their role in observing and maintaining ETT cuff pressure within the ideal range by using a cuff inflator or using a syringe at the service point.

Observational Analysis of Endotracheal Tube Cuff Pressure Changes during Laparoscopic Surgery in Trendelenburg and Reverse Trendelenburg Position

Observational Analysis of Endotracheal Tube Cuff Pressure Changes during Laparoscopic Surgery in Trendelenburg and Reverse Trendelenburg Position

Comparison of Endotracheal Tube Cuff Pressure change between Supine prone and Supine – Knee Chest Position in Lumbar Disc Surgery

Background: In rare instances, massive over inflation of the cuff may lead to acute complications such as tracheal bleeding or rupture. This may be associated with post-operative complications like sore throat hoarseness of voice. The purpose of this study was to evaluate the ETT cuff pressure changes between supine to prone and supine to knee chest position in lumber disc surgery. Materials &amp; Methods: Sixty patients, aged between 18 to 60 years of either sex, belonging to American Society of Anaesthesiology (ASA) physical status I to II undergoing elective lumbar disc surgery under general anaesthesia either in prone position or in knee-chest position were considered for this study. The patients were randomly allocated into two groups of 30 patients each. Group “p” was undergone operation in prone position and group “k” undergone operation in knee-chest position. The patients were connected to standard monitoring system such as non-invasive blood pressure (NIBP), electrocardiogram (ECG), pulse oxymeter, and capnometer. All patients were pre-medicated with inj. glycopyrrolate 0.2 mg and inj. fentanyl 2µg/kg iv 5-6 minutes before induction of anaesthesia and were pre-oxygenated with 100% oxygen for atleast 3 minutes. All the patients were induced with inj. propofol 2.5 mg/kg i.v. followed by inj. rocuronium at a dose of 1.2 mg/kg for facilitating tracheal intubation with reinforced ETT. The ETT size selected for men and women were 8.0-8.5 mm ID and 7.0- 7.5 mm ID (Mallinckrodt) respectively. Results: Group k patients showed higher cuff pressure change from 25 to 39.97cm of H2O compared to group p from 25 to 30.47 cm of H2O after change of position only. There was statistically significant different found between groups Sore throat was found significantly higher in group k compared to group p (20% vs 16.67%). Conclusion: The cuff pressure of the endotracheal tube should be monitored and managed properly after the position change from supine to prone and prone to knee chest position.

The effect of different endotracheal tube cuff pressure monitoring systems on postoperative sore throat in patients undergoing tracheal intubation: a randomized clinical trial

BackgroundPostoperative sore throat (POST) is an unpleasant outcome that can occur as a result of tracheal intubation in adults. Increased pressure from the endotracheal tube (ETT) cuff often leads to local mucosal injury, resulting in sore throat. The purpose of this study was to compare the effect of two different ETT cuff pressure monitoring systems vs. no cuff pressure monitoring on the incidence and severity of POST in adults.MethodsOne hundred and fourteen ASA I-III patients of either gender, aged 18–65 years, and undergoing surgery requiring endotracheal intubation were included in this study. Patients were randomized into three groups: control (C), cuff pressure gauge (G), and automated cuff controller (A). The ETT cuff pressure was not monitored intraoperatively in group C but was monitored using a cuff pressure gauge and an automated cuff controller in groups G and A, respectively. Postoperatively, patients were assessed at 2, 24, and 48 h for the presence and severity of POST, hoarseness and cough.ResultsOne hundred and eleven patients completed the study. POST occurred in 40.5% of the patients in group G (n = 37) (p = 0.013) and 23.7% of the patients in group A (n = 38) (p < 0.001) within 48 h after surgery, compared to 69.4% in group C (n = 36). There were no significant differences in hoarseness, coughing, and dysphagia across the groups at any time. When comparing groups A and C, individuals in group A exhibited a lower occurrence of significant (grade ≥ 2) POST and hoarseness (10.5% vs. 41.7%, p = 0.002; 26.3% vs. 58.3%, p = 0.005). The incidence of significant cough and dysphagia did not differ substantially across the patient groups within 48 h after surgery. POST scores in group A at 2, 24 h postoperatively were both 0 (0–0), which was significantly lower than those in group C (1 (0–2) at 2 h, p < 0.001 ; 1 (0–1) at 24 h, p = 0.001). POST in group G at 2 h postoperatively was graded as 0 (0–1.5) which was milder than group C (P = 0.024). The severity of hoarseness in group A with scores of 0 (0–2) was superior to that in group C (2 (0–2), p = 0.006) at 2 h postoperatively.ConclusionsIn conclusion, the findings of this study indicated that the occurrence of POST can be reduced by using either the cuff pressure gauge approach or the automated cuff controller method. The automated cuff controller monitoring can potentially decrease the severity of POST and hoarseness.Trial registrationChinese Clinical Trial Registry, identifier: ChiCTR2100054089, Date: 08/12/2021.

The Effect of Topical Benzydamine Hydrochloride and Cuff Pressure Monitorization on Postoperative Sore Throat Due to Intubation.

Postoperative sore throat (POST) is the most common discomfort after endotracheal intubation. Damage to the tracheal mucosa caused by inappropriate endotracheal tube (ETT) cuff pressure has been shown as the major factor. Monitoring the ETT cuff pressure at a certain value reduces this damage. Benzydamine hydrochloride (BH) has proven to be effective on sore throat and studies have shown that it is also effective on POST. In this study, the efficacy of BH and ETT cuff pressure monitoring on POST was evaluated. After ethics committee approval 210 patients in the ASA (American Society of Anesthesiologists) I-III risk group undergoing elective surgery were included in the study. Routine anesthesia monitoring, induction, and maintenance were provided. Patients were randomly divided into three groups. Thirty minutes before surgery, the posterior pharyngeal wall was sprayed with BHin group 1and distilled water in groups 2 and 3. Intraoperatively, the first and second groups were monitored to keep the ETT cuff pressure between 22 and 26 cmH2O, while no intervention was performed in the third group. The incidence and severity of postoperative dysphagia, hoarseness, and POST were questioned. There was no difference between demographic data, and gender was not associated with POST. There was a statistically significant difference between the first and second groups and the third group in terms of all three symptoms questioned (p<0.01). No difference was observed between the first and second groups. Side effect rates were similar. Smoking was not found to be associated with symptoms. The incidence and severity of POST, dysphagia, and hoarseness are reduced when the ETT cuff is inflated with a pressure of 22-26 cmH2O after intubation with a manometer and maintained at this pressure range throughout the operation. There was no beneficial effect of BH.