Recommendations for airway control and difficult airway management in paediatric patients.
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Biomedical subjects
Publications and source records attributed to F Agrò.
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During cardiac surgery, as a result of surgical aggression, myocardial ischaemia and cardiopulmonary bypass, the renin-angiotensin-aldosterone mechanism is intensely activated. Our aim is to document whether, in the case of patients undergoing chronic treatment with lisinopril, the non-withdrawal of this inhibitor's administration before cardiac surgery and the administering of a last dose on the day of the operation are associated with coronary haemodynamic alterations. A study was made of 18 patients submitted to myocardial revascularization under extracorporeal circulation and distributed in two groups: group A) without ACE inhibitorsplacebo, group B) with ACE inhibitors (Lisinopril). Coronary blood flow (CBF) was determined by inverted thermodilution via Baim's catheter. Coronary and metabolic haemodynamic values were calculated. Lisinopril had no significant influence on the CBF or on the other above-mentioned values. Therefore, it is not necessary to withdraw ACE inhibitors in cardiac surgery interventions.
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The laryngeal mask airway (LMA) can be used for gastroscopy, but its use can result in loss of the seal and/or displacement of the cuff. We describe an LMA that was specifically modified for gastroscopy and report its use in a patient with an esophageal tumor. The modified LMA has (a) a second tube that allows instruments to be directed toward the esophagus and (b) a second cuff mounted on the dorsal surface that increases the efficacy of the seal with the larynx. A 78-year-old man weighing 65 kg presented with a large mediastinal adenocarcinoma that was infiltrating the lateral wall of the thoracic esophagus. An esophagoscopy under anesthesia was planned to debulk the tumor. The modified LMA was inserted easily following induction with propofol. Anesthesia was maintained with propofol and 50% O2 in air and spontaneous ventilation. A lubricated 10.5-mm external diameter gastroscope was inserted into the second tube and passed easily into the esophagus. The tumor was successfully debulked using a polypectomy snare and an argon plasma coagulator. There was no loss of seal or displacement of the cuff, and the patient was stable throughout the procedure. We conclude that gastroscopy is feasible with the modified LMA. The device has a potential application in patients who require ventilatory support during gastroscopy.
PURPOSE: About 1% to 3% of laryngoscopic intubations can be difficult or impossible. Light-guided intubation has been proven to be an effective, safe, and simple technique. This article reviews current knowledge about the newer version lightwand: the Trachlight (TL). SOURCE: To determine its clinical utility and limitations, we reviewed the current literature (book and journal articles) on the TL since its introduction in 1995. PRINCIPAL FINDINGS: TL has been shown to be useful both in oral and nasal intubation for patients with difficult airways. It may also be useful in "emergency" situations or when direct laryngoscopy or fiberoptic endoscopy is not effective, such as with patients who have copious secretions or blood in the oropharynx. TL can also be used for tracheal intubation in conjunction with other devices (laryngeal mask airway -LMA-, intubating LMA, direct laryngoscopy). However, TL should be avoided in patients with tumours, infections, trauma or foreign bodies in the upper airway. CONCLUSIONS: Based on the clinical reports available, the TL has proven to be a useful option for tracheal intubation. In addition, the device can also be used together with other intubating devices, such as the intubating LMA and the laryngoscope, to improve intubating success rates. A clear understanding of the principle of transillumination of the TL, and an appreciation of its indications, contraindications, and limitations, will improve the effectiveness of the device as well as reducing the likelihood of complications. Finally, regular practice with the TL with routine surgical patients requiring tracheal intubation will further improve intubation success rates.
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The esophageal tracheal combitube (ETC) is a supraglottic airway device that functions as an effective alternative to ventilation via mask and tracheal intubation and is therefore a valuable tool in difficult and emergency airway management. The Com-bitube has proven to be a valuable tool for securing the airways and providing adequate ventilation. Its advantages are that it is easy to insert quickly, it may be inserted blindly or with the aid of a laryngoscope, and it provides adequate ventilation and oxygenation in both esophageal and tracheal position. The combitube allows application of high ventilatory pressures and it minimises the risk of aspiration. Several guidelines including European Resuscitation Council, Ame-rican Heart Association, American Society of Anesthesiologists have included the combitube as a primary rescue device in cannot ventilate cannot intubate situations. It has been used in elective patients as well as in emergency situations in- and out-of-hospital. The combitube can be inserted with minimal movement of the cervical spine and is therefore indicated whenever cervical spine movement is anatomically restricted (e.g. rheumatoid arthritis) or should be functionally restricted (e.g. trauma). Since the combitube isolates the lungs from the esophagus it is especially useful in patients at risk for aspiration (e.g., caesarean section, morbid obesity). The combitube is available in two sizes: 37 F SA (Small Adult) and 41 F. Unfortunately, a pediatric size is not commercially available. Training in the use of the combitube under controlled conditions is prerequisite to being expert in an emergency situation. The combitube is another non-surgical airway in the armamentarium of the anaesthesiologist or emergency provider in case of foreseen or unforeseen difficult airways in patients who can neither be intubated or mask ventilated.
A new tracheal intubation device is available. The 'Shikani Seeing Stylet' is a new, inexpensive, reusable high resolution endoscope with a malleable stainless-steel sheath which can be inserted through a tracheal tube allowing intubation to be performed under direct vision. We have assessed this new device on 20 patients (ASA I-II; age 25-67) scheduled to undergo elective surgery with tracheal intubation. We measured heart rate (HR), non invasive blood pressure (NIBP), oxygen saturation (SpO(2)) and end tidal carbon dioxide (ETCO(2)) at three different times: T(0) (induction of anesthesia), T(1) (beginning of intubation procedure), T(2) (end of intubation procedure); we also recorded the time interval between T(1) and T(2). All patients were successfully intubated with the device. Eleven patients were intubated at the first attempt (T(1)-T(2) mean time=8. 65 s); three patients were intubated at the first attempt using cricoid pressure (T(1)-T(2) mean time 11.6 s); four patients were intubated at the second attempt (T(1)-T(2) mean time=36.5 s); two patients were intubated at the third attempt (T(1)-T(2) mean time=54. 5 s). The HR, NIBP, SpO(2) and ETCO(2) remained fairly stable. On the basis of our preliminary experience with 20 patients, the 'Shikani Seeing Stylet' seems to be a promising adjunct for airway management.