The Experts below are selected from a list of 447 Experts worldwide ranked by ideXlab platform
John D Doyle - One of the best experts on this subject based on the ideXlab platform.
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a multi channel acoustics monitor for perioperative respiratory monitoring preliminary data
Journal of Clinical Monitoring and Computing, 2016Co-Authors: Kamal Jafarian, Majid Amineslami, Kamran Hassani, Mahdi Navidbakhsh, Mohammad Niakan Lahiji, John D DoyleAbstract:This study pertains to a six-channel acoustic monitoring system for use in patient monitoring during or after surgery. The base hardware consists of a USB data acquisition system, a custom-built six-channel amplification system, and a series of microphones of various designs. The software is based on the MATLAB platform with data acquisition drivers installed. The displayed information includes: time domain signals, frequency domain signals, and tools to aid in the detection of Endobronchial Intubation. We hypothesize that the above mentioned arrangement may be helpful to the anesthesiologist in recognizing clinical conditions like wheezing, bronchospasm, Endobronchial Intubation, and apnea. The study also evaluated various types of microphone designs used to transduce breath sounds. The system also features selectable band-pass filtering using MATLAB algorithms as well as a collection of recordings obtained with the system to establish what respiratory acoustic signals look like under various conditions.
Felix Berger - One of the best experts on this subject based on the ideXlab platform.
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tracheal tube tip displacement in children during head neck movement a radiological assessment
BJA: British Journal of Anaesthesia, 2006Co-Authors: Markus Weiss, Walter Knirsch, Oliver Kretschmar, Alexander Dullenkopf, Maren Tomaske, Christian Balmer, K Stutz, A C Gerber, Felix BergerAbstract:Background Aims of this study were to assess the maximum displacement of tracheal tube tip during head-neck movement in children, and to evaluate the appropriateness of the Intubation depth marks on the Microcuff Paediatric Endotracheal Tube regarding the risk of inadvertent extubation and Endobronchial Intubation. Methods We studied children, aged from birth to adolescence, undergoing cardiac catheterization. The patients' tracheas were orally intubated and the tracheal tubes positioned with the Intubation depth mark at the level of the vocal cords. The tracheal tube tip-to-carina distances were fluoroscopically assessed with the patient supine and the head-neck in 30° flexion, 0° neutral position and 30° extension. Results One hundred children aged between 0.02 and 16.4 yr (median 5.1 yr) were studied. Maximum tracheal tube-tip displacement after head-neck 30° extension and 30° flexion demonstrated a linear relationship to age [maximal upward tube movement (mm)=0 0.71×age (yr)+9.9 (R2=0.893); maximal downward tube movement (mm)=0.83×age (yr)+9.3 (R2=0.949)]. Maximal tracheal tube-tip downward displacement because of head-neck flexion was more pronounced than upward displacement because of head-neck extension. Conclusions The Intubation depth marks were appropriate to avoid inadvertent tracheal extubation and Endobronchial Intubation during head-neck movement in all patients. However, during head-neck extension the tracheal tube cuff may become positioned in the subglottic region and should be re-adjusted when the patient remains in this position for a longer time.
Kamal Jafarian - One of the best experts on this subject based on the ideXlab platform.
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a multi channel acoustics monitor for perioperative respiratory monitoring preliminary data
Journal of Clinical Monitoring and Computing, 2016Co-Authors: Kamal Jafarian, Majid Amineslami, Kamran Hassani, Mahdi Navidbakhsh, Mohammad Niakan Lahiji, John D DoyleAbstract:This study pertains to a six-channel acoustic monitoring system for use in patient monitoring during or after surgery. The base hardware consists of a USB data acquisition system, a custom-built six-channel amplification system, and a series of microphones of various designs. The software is based on the MATLAB platform with data acquisition drivers installed. The displayed information includes: time domain signals, frequency domain signals, and tools to aid in the detection of Endobronchial Intubation. We hypothesize that the above mentioned arrangement may be helpful to the anesthesiologist in recognizing clinical conditions like wheezing, bronchospasm, Endobronchial Intubation, and apnea. The study also evaluated various types of microphone designs used to transduce breath sounds. The system also features selectable band-pass filtering using MATLAB algorithms as well as a collection of recordings obtained with the system to establish what respiratory acoustic signals look like under various conditions.
Shanshan Wang - One of the best experts on this subject based on the ideXlab platform.
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efficacy of Endobronchial Intubation with double lumen tube using fiberoptic bronchoscope assisted by video laryngoscope
Chinese Journal of Anesthesiology, 2016Co-Authors: Zhijie Zhang, Shanshan WangAbstract:Objective To evaluate the efficacy of Endobronchial Intubation with double-lumen tube using fiberoptic bronchoscope assisted by video laryngoscope. Methods Thirty patients of both sexes, who underwent failed Endobronchial Intubation with double-lumen tube using direct laryngoscope, aged 25-64 yr, with body mass index of 23-34 kg/m2, were randomly divided into 2 groups (n=15 each)using a random number table: fiberoptic bronchoscope group (group F)and fiberoptic bronchoscope assisted by video laryngoscope group (group VF). The patients were intubated with double-lumen tube under the guide of fiberoptic bronchoscope in group F. The patients were intubated with double-lumen tube under the guide of fiberoptic bronchoscope assisted by video laryngoscope in group VF.The rate of successful Intubation, Intubation time, and glottis and epiglottis exposure condition when the video laryngoscope was used in group VF were recorded.The patients were followed up postoperatively, and the development of Intubation-related complications (sore throat, hoarseness and swallowing difficulty)was also recorded. Results Compared with group F, the Intubation time was significantly shortened, and the success rate of Intubation at first attempt and second success rate of Intubation were significantly increased in group VF (P 0.05). Conclusion Video laryngoscope provides better efficacy for Endobronchial Intubation with double-lumen tube using fiberoptic bronchoscope. Key words: Laryngoscopes; Bronchoscopes; Intubation, intratracheal
Sunghee Han - One of the best experts on this subject based on the ideXlab platform.
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comparison of conventional and fibreoptic guided advance of left sided double lumen tube during Endobronchial Intubation a randomised controlled trial
European Journal of Anaesthesiology, 2020Co-Authors: Jinwoo Park, Sunghee Han, Jin H Park, Yu K Bae, Seong Joo Park, Sung Woo Cho, Jin Hee KimAbstract:BACKGROUND Postoperative sore throat and airway injuries are relatively common after double-lumen tube (DLT) Intubation. OBJECTIVE The current study aimed to evaluate the effects of fibreoptic-guided advance of DLT on postoperative sore throat and airway injuries associated with Intubation. DESIGN A randomised controlled study. SETTING Tertiary hospital, Seongnam, Korea, from January 2018 to January 2019. PATIENTS One hundred twenty three patients undergoing one-lung ventilation with a left-side DLT were randomised into two groups: 62 in the conventional group and 61 in the fibreoptic-guided group. INTERVENTION After entering the glottis, the DLT was rotated left 90° and advanced blindly into the left main bronchus in the conventional group. In the fibreoptic-guided group, DLT was advanced into the main bronchus under the guide of fibreoptic bronchoscope, which had been passed through the bronchial lumen and inserted into the left main bronchus. MAIN OUTCOME MEASURES The primary outcome was postoperative sore throat at 24 h after operation. The airway injuries were also examined using a bronchoscope during extubation. RESULTS At postoperative 24 h, the fibreoptic-guided group showed lower pain score (P = 0.001) and lower incidence (risk ratio [95% CI]: 0.2 [0.1 to 0.5], P < 0.001) of sore throat, compared with the conventional group. Moreover, tracheal injury was more severe in the conventional group than in the fibreoptic group (P = 0.003). Vocal cord injuries also occurred less frequently in the fibreoptic-guided group (risk ratio [95% CI]: 0.4 [0.2 to 1.0], P = 0.036). CONCLUSION The fibreoptic-guided advancement seems to reduce irritation to the airway, leading less postoperative complications. TRIAL REGISTRATION ClinicalTrials.gov, registration number: NCT03368599.
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a comparative study of endotracheal tube positioning methods in children safety from neck movement
Anesthesia & Analgesia, 2007Co-Authors: Seungyeon Yoo, Jin Hee Kim, Sunghee HanAbstract:BACKGROUND The unexpected displacement of the endotracheal tube (ETT) as a result of neck movements can cause Endobronchial Intubation and accidental extubation. The ETT is subject to movement even after its proper placement has been confirmed either clinically or radiographically. METHODS One-hundred-seven children (2-8 yr) were divided randomly into three groups. In Group I, the ETT was entered into the main bronchus and withdrawn until equal sounds in both lung were heard, and then withdrawn 2 cm. In Group II, the ETT position was determined by placing the prescribed marks on the ETT at the level of the vocal cords, and in Group III, by palpating the ETT tip at the suprasternal notch. In all groups, the distance between the ETT tip and the carina was measured using a fiberoptic bronchoscope. The relative ETT tip position along the trachea (carina; 0%, vocal cords; 100%) was assessed in each position during neck movement. RESULTS The relative position of the ETT with the patient in the neutral position in Groups I, II, and III was 21.4% +/- 6.7%, 46.5% +/- 13.0%, and 43.4% +/- 11.1%, respectively. In Group I, the relative ETT position after flexion was 9.5% +/- 10.3%, and Endobronchial Intubation was observed in five children (14.3%). There was no extubation or Endobronchial Intubation in the other two groups. CONCLUSIONS Positioning the ETT by auscultation places the ETT more deeply than the midtrachea, which can increase the risk of Endobronchial Intubation during neck flexion.