Jet ventilation through jet stylets.
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Biomedical subjects
Publications and source records attributed to R P Haridas.
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The Sonomatic Confirmation of Tracheal Intubation (SCOTI, Penlon, UK) device was evaluated in the laboratory with cut and uncut tracheal tubes and in 50 adult patients who underwent tracheal and oesophageal intubation with uncut tracheal tubes. We could not configure the SCOTI reliably with cut tracheal tubes. In the clinical study using uncut tubes the SCOTI identified all oesophageal intubations, but was only able to identify 84% (95% CI: 73.8-94.2%) of tracheal intubations. We recommend caution in using this device and further independent evaluation to determine its reliability.
The haemodynamic response to laryngeal mask insertion and tracheal intubation was studied in 27 hypertensive patients who underwent elective ophthalmic surgery. Both groups received alfentanil 15 micrograms/kg, thiopentone 3-4 mg/kg and vecuronium 0.1 mg/kg and were ventilated with oxygen, nitrous oxide and isoflurane for 3 minutes prior to laryngeal mask insertion or tracheal intubation. Blood pressure and heart rate decreased equally in both groups after induction of anaesthesia. Haemodynamic variables increased after tracheal intubation but were unchanged after laryngeal mask insertion (P < 0.05 for intergroup differences). Heart rate, but not blood pressure, increased above baseline levels in the tracheal intubation group. The anaesthetic technique used blunted the haemodynamic response to tracheal intubation, but completely blocked the response to laryngeal mask insertion.
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Pain management is an essential part of postoperative care. The present availability of multiple modalities of patient controlled and continuous regional analgesia requires the reorganization of existing hospital structures to be efficacious and safe. This article presents an Acute Pain Service (APS) as a model for a reorganized structure. Although anaesthesia based, this service requires close co-operation of surgeons, nurses and other paramedical personnel to achieve the expected results. Prerequisites of an APS are careful selection of suitable techniques as well as the formulation of protocols and standing orders for the techniques. Inservice training of involved personnel, dedicated single ward trials and introduction of the revised technique for general use are further essential steps in its development. The organizational structures proposed include selection of the appropriate technique for a patient by the theatre anaesthetist, preparation and documentation by the recovery nurse, monitoring and ongoing skilled assessment by the ward nurse and ward rounds, advice and 24 h availability by anaesthetists.