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At least 73 records · Page 4Linked to original sources
PubMed2004

Evaluation of the Intubating Laryngeal Mask Airway used by occasional intubators in simulated trauma.

This observational study assessed the potential role of the intubating laryngeal mask airway (ILMA) for use by emergency care givers with limited laryngoscopy skills. Six ambulance officers with advanced airway training, five doctors with intubation experience and five doctors without intubation experience were given a short instruction course on the use of the ILMA. They subsequently used the device on 80 consenting subjects anaesthetized for elective surgery after the application of cricoid pressure and manual in-line stabilization of the cervical spine. All patients were successfully ventilated via the ILMA. Mean (SD) times in seconds to ventilation were 27 (10), 33 (18) and 47 (22) respectively in the occasional intubator ambulance officers, occasional intubator doctor and naive intubator groups. The numbers (percentage) failures to intubate via the ILMA in each group were 2 (7%), 5 (20%) and 4 (16%) respectively. Mean (SD) times in seconds to intubation were 32 (23), 32 (17) and 36 (25). There was no evidence of "learning" with repeated use. The feedback forms were strongly supportive of a prehospital trial and also of having an ILMA available during all intubations. Participants almost universally rated the ILMA as easy to use. This study supports further evaluation of the ILMA in a large prehospital trial.

Adult↗
PubMed1989

Cardiovascular responses to tracheal intubation: a comparison of direct laryngoscopy and fibreoptic intubation.

The cardiovascular responses to tracheal intubation using a fibreoptic bronchoscope or Macintosh laryngoscope were compared in twenty in-patients and twenty day-stay patients. Within these groups patients were randomly allocated to direct laryngoscopic or fibreoptic bronchoscopic intubation. Arterial blood pressure, heart rate and arterial oxygen saturation were recorded before induction and at one-minute intervals until four minutes after intubation. In both groups both laryngoscopic and bronchoscopic intubation resulted in a significant rise in blood pressure and heart rate. At no stage was there a significant difference in mean blood pressure in either group, or in heart rate in the day-stay patients, between the different methods of intubation. In the in-patients mean heart rate was significantly higher in those patients intubated with the bronchoscope at three and four minutes after intubation. Time taken for intubation was significantly longer in those patients intubated with the bronchoscope. In no patient did the arterial oxygen saturation fall below 98%.

Adult↗
PubMed1996

Intubation without muscle relaxant: an alternative technique for rapid tracheal intubation.

The quality of laryngoscopy and tracheal intubation with propofol augmented by alfentanil was investigated as an alternative technique for rapid tracheal intubation. 119 patients aged between 18 and 60 years (ASA 1 and 2) undergoing elective surgery were prospectively studied in a randomized double-blind controlled fashion. Tracheal intubation facilitated by suxamethonium 1.0 mg/kg alfentanil 15 mu g/kg alfentanil 30 mu g/kg or saline control was compared after propofol induction. The quality of laryngoscopy and intubation were graded according to jaw relaxation, ease of insertion of the endotracheal tube and coughing on intubation. Failure to intubate occurred in 4% and 17% with alfentanil 15 mu g/kg and saline control respectively Tracheal intubation was successful in all patients with alfentanil 30 mu g/kg and suxamethonium 1.0 mg/kg. Alfentanil 15 mu g/kg was not statistically significantly different from saline (P = 0.112). Alfentanil 30 mu g/kg provided similar overall intubating conditions (P = 0.5) to suxamethonium 1.0 mg/kg. Alfentanil in both dosages effectively attenuated the haemodynamic responses to laryngoscopy and tracheal intubation.

Adolescent↗
PubMed2000

[A comparison of bullard laryngoscope and intubating laryngeal mask using fiberoptic guidance for tracheal intubation].

The purpose of this study is to compare the success rate of tracheal intubation, intubation time and laryngoscopic view of the larynx by Bullard laryngoscope or by intubating laryngeal mask using fiberoptic guidance in 50 patients. Following a standardized induction protocol, conventional laryngoscopic view by Macintosh's laryngoscope was obtained and classified by Cormack's grades. We measured the times from incertion of laryngoscopy or laryngeal mask until obtaining the best view of the larynx and until tracheal intubation. A best view by Bullard laryngoscopy or by fiberoscopy through the laryngeal mask was classified by Cormack's grades. The success rate of tracheal intubation was higher by Bullard laryngoscopy than by intubating laryngeal mask. The durations of laryngoscopy and tracheal intubation were significantly shorter and Cormack's grades were significantly lower by Bullard laryngoscopy than by laryngeal mask and fiberscopy. These results demonstrate that tracheal intubation by Bullard laryngoscope is faster and more successful compared with intubating laryngeal mask using fiberoptic guidance.

Adolescent↗
PubMed2003

Intubating laryngeal mask airway versus laryngoscopy and endotracheal intubation in the nuclear, biological, and chemical environment.

OBJECTIVE: Intubation is a difficult skill under normal circumstances and more so with a limited visual field such as wearing a protective mask in a chemical or biological incident. This study sought to determine whether successful intubation using the intubating laryngeal mask airway (ILMA) under protective mask conditions was equivalent to standard endotracheal intubation. METHODS: A pilot study was conducted using emergency medicine personnel. Participant's attempted intubation of a manikin while wearing a standard U.S. Army M-40 protective mask. Two attempts were performed with each method. RESULTS: One hundred percent of the ILMA placements were successful with only 78% success with endotracheal intubation (p = 0.1). Time to successful intubation and ventilation was significantly less for the ILMA versus endotracheal intubation (p = 0.005). CONCLUSION: This study suggests that under simulated chemical and biological conditions using an M-40 protective mask, intubation is accomplished faster and with more success with the ILMA.

Biological Warfare↗
PubMed1991

[Utility of Bullard intubating laryngoscope with a special stylet in two cases of difficult tracheal intubation].

The Bullard intubating laryngoscope is useful for cases of difficult tracheal intubation, but a skilled hand is needed to manipulate it. In two cases of difficult tracheal intubation, we used a recently improved Bullard intubating laryngoscope to which a special stylet is attached to introduce an endotracheal tube easily into the larynx. The difficulties of tracheal intubation were caused by micrognathia and trismus in one case and by restriction of neck movement and trismus due to ankylosing spondylitis in the other case. Using the Bullard intubating laryngoscope with the special stylet, intubation was done smoothly in both cases. This improved Bullard intubating laryngoscope is recommended for cases of difficult tracheal intubation.

Adolescent↗
PubMed2005

Intubation confirmation techniques associated with unrecognized non-tracheal intubations by pre-hospital providers.

This study examined pre-hospital intubations performed by paramedics, which were later determined to be non-tracheal upon arrival at an urban, academic emergency department (ED). The aim was to characterize the various confirmation techniques used among these unrecognized non-tracheal intubations. A retrospective review of the emergency medical services (EMS) quality assurance database was conducted over a period of 65 months. Paramedic patient care reports and hospital medical records were reviewed with regard to techniques used for airway evaluation. Simple descriptive statistics are used to summarize the data. During this study period, paramedics intubated 1643 patients. There were 35 (2%) intubations that were ultimately determined to be non-tracheal by receiving physicians. Among these, 20 (57%) were intubations for trauma indications. Seven patients (20%) were children (< 10 years). Fifteen patients (43%) did not have a pulse before intubation attempts. Overall, 21 (60%) had multiple confirmatory techniques employed by paramedics. The most commonly documented was 'equal lung sounds' (91%), followed by 'visualized cords' (52%). Per protocol, colorimetric end tidal CO2 was used selectively among patients with pulses, 9/20 (45%). Aspiration techniques were not used among this study population. Based on paramedic documentation, 17 (49%) of the non-tracheal intubations were potentially recognizable. An unrecognized, non-tracheal intubation is a potentially devastating consequence of failed airway management. We report a small, but important experience with failed pre-hospital airway management. In this EMS system, more frequent use of multiple confirmatory techniques (including end tidal CO2 detection) may help to reduce the incidence of this potentially life-threatening scenario.

Carbon Dioxide↗
PubMed2000

A comparative study of tracheal intubation using an intubating laryngeal mask (Fastrach) alone or together with a lightwand (Trachlight).

STUDY OBJECTIVE: To determine if the Trachlight lightwand can facilitate Fastrach intubation by guiding the tip of the endotracheal tube into the trachea. DESIGN: Open-label, prospective, randomized, comparative study. SETTING: General operating suites of a tertiary teaching hospital. PATIENTS: 172 elective surgical patients requiring general anesthesia with endotracheal intubation. INTERVENTIONS: With general anesthesia, the Fastrach, which is a new intubating laryngeal mask airway, was inserted into the oropharynx. Ventilation was ensured before the insertion of an endotracheal tube via the Fastrach. Tracheal intubation was then performed randomly (coin toss) using either the endotracheal tube alone (Fastrach group), or endotracheal tube with the Trachlight, a lightwand (Fastrach/Trachlight group). The time to place the Fastrach and endotracheal tube, to remove the Fastrach, and the total time to intubate were recorded. The number of attempts, failures, trauma, sore throats, and hemodynamic changes were also recorded. Data were analyzed using unpaired t-test, ANOVA with repeated measures, or Chi-squares contingency table where appropriate. MEASUREMENTS AND MAIN RESULTS: Although there were no differences in the times to place the Fastrach, and endotracheal tube, the hemodynamic changes, and postoperative complications, there were significantly more attempts and failures in the Fastrach group compared to the Fastrach/Trachlight group. There were no differences in the incidence of sore throat and trauma in between the groups. CONCLUSIONS: Although tracheal intubation is effective using a Fastrach alone (76% success rate), it is more effective when the Fastrach is used in conjunction with the Trachlight (95%). These results suggest that the lightwand is a useful adjunct for Fastrach intubation. However, the role of Fastrach intubation together with the Trachlight in the management of patients with a potential difficult airway remains to be determined.

Anesthesia, General↗
PubMed1999

Lightwand intubation does not reduce the increase in intraocular pressure associated with tracheal intubation.

OBJECTIVE: To evaluate the changes in hemodynamic variables and intraocular pressure (IOP) after tracheal intubation using either lightwand or direct-vision laryngoscopy techniques. DESIGN: Prospective, randomized study. SETTING: Inpatient anesthesia at a University Anesthesia Department. PATIENTS: 50 normotensive, ASA physical status I and II patients, without ocular or cardiovascular diseases, and with a Mallampati score no greater than 2. INTERVENTIONS: After intravenous (i.v.) midazolam premedication (0.05 mg.kg-1), general anesthesia was induced with fentanyl (1 microgram.g-1) and thiopental sodium (5 mg.g-1) followed by vecuronium bromide (0.1 mg.g-1), then patients were randomly allocated to receive either the lightwand (Trachlight, n = 25) or direct-vision laryngoscopy (Laryngoscopy, n = 25) intubating techniques. General anesthesia was maintained with 1% isoflurane and 60% nitrous oxide in oxygen mixture for 5 minutes. MEASUREMENTS AND MAIN RESULTS: Baseline hemodynamic variables were recorded 10 minutes after i.v. premedication, and then every minute after tracheal intubation. Intraocular pressure measurements were performed by means of a computerized indentation tonometer after general anesthesia induction and then 1 and 5 minutes after tracheal intubation. In both groups, mean arterial blood pressure and heart rate increased from baseline, without differences between the two groups. One minute after intubation, IOP increased in both groups: the mean percentage increase was 32% in the Laryngoscopy group and 16% in the Trachlight group. However, this difference was not statistically significant. Five minutes after intubation, IOP decreased to baseline values in both groups. CONCLUSION: We conclude that in healthy patients without ocular disease, using a lightwand intubating technique does not reduce the hemodynamic responses and increase in IOP associated with tracheal intubation as compared with conventional direct-vision laryngoscopy.

Anesthesia, General↗
PubMed2004

Stress response to tracheal intubation in patients undergoing coronary artery surgery: direct laryngoscopy versus an intubating laryngeal mask airway.

OBJECTIVE: Stress response caused by endotracheal intubation may be harmful for the coronary or cerebral circulation of high-risk patients. This study evaluated the hypothesis that tracheal intubation via an intubating laryngeal mask airway is associated with less cardiovascular and endocrine stress response than the conventional technique using direct laryngoscopy. DESIGN: Randomized, patient-blinded trial. SETTING: University department (single center). PARTICIPANTS: Eighty-six patients undergoing elective coronary artery surgery. INTERVENTION: Tracheal intubation was performed via an intubating laryngeal mask or by conventional direct laryngoscopy after standardized induction of anesthesia. MEASUREMENTS AND MAIN RESULTS: Electrocardiogram with automatic ST-segment analysis and invasive measured blood pressure were recorded continuously and blood samples to analyze norepinephrine plasma levels were taken at 4 times. Catecholamine concentrations and the pressure-rate product were analyzed by using an analysis of variance for repeated measures. In both groups, the pressure-rate product (p = 0.003) and norepinephrine concentrations (p < 0.0001) significantly decreased after induction of anesthesia. However, the fall was more marked in the patients intubated via the laryngeal mask (p = 0.031) than in patients receiving direct laryngoscopy. There were neither signs of cardiac ischemia nor major adverse events during induction of anesthesia. CONCLUSIONS: Reduction of cardiovascular and endocrine stress response associated with endotracheal intubation is more pronounced when performed via the intubating laryngeal mask. Thus, this technique can be helpful in high-risk cardiac patients.

Aged↗
PubMed1995

[Unexpectedly difficult intubation: fiberoptic endotracheal intubation with the laryngeal mask].

A 67-year old patient, scheduled for elective transvesical resection of the prostate gland, presented intubation problems. Fibreoptic assessment of the larynx revealed secretions as well as a swollen laryngeal mucosa; endotracheal intubation guided by the fibreoptic bronchoscope was not possible. After multiple attempts to intubate the trachea a laryngeal mask airway was inserted. Endotracheal intubation was completed by guidance of the fibreoptic bronchoscope via the laryngeal mask airway. After surgery the patient was transferred to an ICU and ventilated for one day. Fibreoptically controlled extubation was uneventful. Management of the unexpectedly difficult intubation is a challenge for every anaesthetist. The laryngeal mask airway, a relatively new device for airway protection, has proved to be beneficial in planned as well as in unexpectedly difficult endotracheal intubation. However, although the laryngeal mask airway may solve ventilation problems initially, prelaryngeal alterations present a contraindication for perioperative ventilation via the laryngeal mask airway. The fibreoptic intubation through the laryngeal mask airway is an important technique to consider in the "cannot intubate" situation.

Aged↗
PubMed2004

A comparison of the intubating laryngeal mask airway and the Bonfils intubation fibrescope in patients with predicted difficult airways.

Tracheal intubation with the intubating laryngeal mask airway or the Bonfils intubation fibrescope was performed in 80 patients with predicted difficult airways. Mallampati score, thyromental distance, mouth opening and mobility of the atlanto-occipital joint were used to predict difficult airways. The overall success rate, time to the first adequate lung ventilation and time taken for the successful placement of the tracheal tube were recorded, as well as a subjective assessment of the handling of the device and the incidence of postoperative sore throat and hoarseness. The median [range] time to the first adequate ventilation was significantly shorter with the intubating laryngeal mask airway than with the Bonfils intubation fibrescope (28 [6-85] s vs. 40 [23-77] s, p < 0.005). Tracheal intubation was significantly slower with the intubating laryngeal mask airway than with the Bonfils intubation fibrescope (76 [45-155] s vs. 40 [23-77] s, p < 0.0001. Patients in the Bonfils group suffered less sore throat and hoarseness than those in the other group.

Adolescent↗
PubMedDate not supplied

Teaching basic EMTs endotracheal intubation: can basic EMTs discriminate between endotracheal and esophageal intubation?

HYPOTHESIS: Advanced airway intervention techniques are being considered for use by basic emergency medical technicians (EMTs). It was hypothesized that basic EMTs would be able to discriminate reliably between intratracheal and esophageal endotracheal tube placement in a mannequin model. DESIGN: An airway mannequin with a closed chest cavity was intubated randomly either esophageally or tracheally, and the cuff was inflated. A stethoscope, bag ventilator, and laryngoscope were available next to the mannequin. Placement was assessed by auscultation or direct visualization at the discretion of the EMT. A blinded investigator graded the student. SETTING: A classroom in a large, urban medical center. PARTICIPANTS: Subjects were basic EMTs who volunteered to take part after the conclusion of a six-hour endotracheal intubation training course. RESULTS: Thirty-three subjects were tested. Seventeen of 18 (94%) tracheal intubations and 11 of 15 (73%) esophageal intubations were identified correctly. Only 72% of the students listened to the epigastrium, 81% listened to the lungs, and 85% attempted ventilation. The 10 students who visualized the cords discovered all five esophageal intubations. The 23 students who did not visualize the cords missed four and found six esophageal intubations. CONCLUSION: Basic EMTs had difficulty assessing endotracheal tube placement in a mannequin model. The 27% miss rate for identifying esophageal intubations suggests that basic EMTs will require additional training for safe field use of any airway that requires assessment of tube placement.

Auscultation↗
PubMed1982

A study of the quality and duration of survival following resection, endoscopic intubation and surgical intubation in oesophageal carcinoma.

A series of 130 cases of oesophageal carcinoma managed by one surgeon in a unit with a major interest in oesophageal disorders is reviewed. The management policy has been an active one of resection in suitably selected cases, less favourable ones being treated by operative intubation before 1979 and by endoscopic intubation since 1979. Operative mortality and morbidity have been compared between the three groups, together with duration of survival and quality of swallowing as measured by a modified Visick grading. In the intubated groups, endoscopic intubation carried a hospital mortality of 15.6 per cent compared with 40.8 per cent in the operative group. It was associated with less morbidity and a better quality of survival, although survival times were comparable and did not exceed 18 months in either group. In the resection group, hospital mortality was 12.2 per cent, and both the mean survival and quality of swallowing were greater than in either endoscopic group. It is concluded that in suitably selected cases, resection can be performed with a mortality considered acceptable for palliative intubation whilst conferring greater survival and restoration of normal swallowing. In less favourable cases, endoscopic intubation is superior to operative intubation in terms of reduced mortality and better restoration of swallowing.

Adult↗
PubMed1999

Awake tracheal intubation through the intubating laryngeal mask.

PURPOSE: To report successful awake insertion of the intubating laryngeal mask (Fastrach) and subsequent tracheal intubation through it, in a patient with predicted difficult tracheal intubation, due to limited mouth opening, and difficult ventilation through a facemask, due to a large mass at the corner of the mouth. CLINICAL FEATURES: A 53-yr-old woman with a large post-gangrenous mass on the right cheek to the angle of the mouth was scheduled for its resection. The right side of her face was damaged by a bomb attack followed by cancrum oris 50 yr ago. The distance between the incisors during maximum mouth opening was 2 cm and that between the gums on the right side < 1 cm. After preoxygenation and 50 micrograms fentanyl and 30 mg propofol i.v., propofol was infused at 2 mg.kg-1.hr-1. Lidocaine, 8%, was sprayed on the oropharynx. A #4 intubating laryngeal mask was inserted with a little difficulty. A fibrescope was passed through a 7.5-mm ID RAE tracheal tube, and the combination was easily passed through the laryngeal mask into the trachea. General ansthesia was then induced. Finally, the intubating laryngeal mask was removed, while the RAE tube was being stabilized using an uncuffed 6.0-mm ID tracheal tube. CONCLUSION: Awake tracheal intubation through the intubating laryngeal mask is a useful technique in patients with limited mouth opening in whom ventilation via a facemask is expected to be difficult.

Anesthetics, Intravenous↗
PubMedDate not supplied

Awake tracheal intubation through the intubating laryngeal mask airway in a patient with halo traction.

PURPOSE: To report a case of awake tracheal intubation through the intubating laryngeal mask airway (ILMA) in a patient with halo traction. CLINICAL FEATURES: A 16-yr-old, 40 kg, boy with atlanto-occipital instability and halo traction was scheduled for surgery under general anesthesia. The head of the patient was fixed in a position of flexion and extension was impossible. Cranial magnetic resonance imaging revealed that pharyngeal and laryngeal axes were aligned, but that the oral axis was in an extreme divergent plane. The tongue and oropharynx were anesthetized with 10% lidocaine spray and bilateral superior laryngeal nerve blockade was performed. Under sedation, awake orotracheal intubation via ILMA was successful. Fibreoptic bronchoscopy has been recommended for awake tracheal intubation in such patients. Other techniques, such as use of the Bullard laryngoscope have been described also but awake tracheal intubation through the ILMA in patients with a halo device in situ has seldom been reported in the medical literature. CONCLUSION: Airway management of patients with cervical spine instability includes adequate preoperative evaluation of the airway and choosing the appropriate intubation technique. We suggest that the ILMA may be an adequate alternative for awake tracheal intubation in patients with an unstable cervical spine and cervical immobilization with a halo device.

Anesthesia, General↗
PubMed1998

[The difficult intubation. The value of BURP and 3 predictive tests of difficult intubation].

UNLABELLED: The value of BURP (= backwards-upwards-rightwards-pressure of the larynx) was tested as a improvement of the visualisation of the larynx. Simultaneously we wanted to assess the value of different predictive tests of a difficult intubation, which are easy to perform as bedside tests. PATIENTS AND MATERIAL: 1993 patients of all different surgical clinics in a tertiary care hospital in Switzerland were tested, the complete anaesthesiological staff was involved. We registered the original Mallampati classes, the thyromental distances of Patil and Frerk and the difference of the jugulomental distances in maximally reclined and neutral head position according to Chow. Every anaesthetist also noted his personal, subjective opinion of a possible difficult intubation. Under optimal conditions for intubation we assessed the grade of laryngoscopy according to Wilson and applied BURP if the grade was 3 or higher. Both laryngoscopic grades and the difficulty of intubation were noted. RESULTS: In our study we found 12.5% awkward (Wilson G3-G5) and 4.7% difficult (Wilson G4-G5) laryngoscopies. These could be changed with BURP into 5.0% and 1.9% respectively. With BURP we found 1.8% of difficult intubations. During our study we did not find any patients, whom we could not intubate either with a mandrin inside the tube or with help of the fiberoptic. The relation between sensitivity and specificity was in all single predictors and in two combinations very low. Our personal subjective predictions proofed to be better, but the rate of false negatives was too high for clinical use. CONCLUSION: BURP is a valuable method for rendering the majority of difficult laryngoscopies into easy ones. It is very easy to learn and does not need any additional equipment. Three commonly used and recommended predictive tests of the difficult intubation proofed to be of little use in clinical practice.

Adolescent↗