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J R Maltby

Publications and source records attributed to J R Maltby.

At least 37 records · Page 2Linked to original sources
PubMed1993

Informed consent for clinical anaesthesia research.

Most surgical patients are first seen by an anaesthetist after admission to hospital, either the evening before or on the day of surgery. Some medical ethicists believe that an approach by an anaesthesia researcher made after admission is unethical because the hospital itself is a coercive environment, and patients have insufficient time for reflection or consultation. Others believe that an approach prior to admission may be an invasion of the patient's privacy and confidentiality. The implications of these views for anaesthesia researchers may not be apparent to research ethics boards (REBs). To determine current practice, a questionnaire concerning the membership and function of REBs and the time of obtaining informed consent was sent to each research representative of the 16 Canadian university departments of anaesthesia. Membership of REBS was similar, but not identical, in all centres. Most representation was from medical disciplines. Consent was generally obtained following the patient's admission to hospital. In one centre, the REB always requested informed consent to be obtained before the patient's admission to the hospital. Surgeons had no involvement with consent for anaesthesia research in 14 centres while in the other two they gave permission for their patients to be studied and informed patients of the potential approach by anaesthesia researchers. We conclude that it is ethically acceptable to obtain informed consent for most low-risk clinical anaesthesia research after the patient's admission to hospital.

Anesthesiology↗
PubMed1993

Anaesthesia services and the education of anaesthetists in Nepal: a model for sustainable development?

In 1985 the University of Calgary in Canada and Tribhuvan University in Kathmandu, Nepal Jointly established the Diploma in Anaesthesiology (DA) programme in Nepal. To evaluate the impact of the DA Programme and provide a data base for long-term planning we conducted a national survey in 1992. We sought to describe anaesthesia manpower and workloads, and to make an inventory of facilities, equipment, and supplies in different sized hospitals. Twenty-seven hospitals providing surgical services were included, nine inside and 18 outside the Kathmandu valley. Seventeen of the 21 respondent hospitals had at least one specialist anaesthetist. The results identify both strengths and weaknesses in Nepal's anaesthesia services and provide important guidelines for planning. When the DA course was launched there were only seven specialist anaesthetists in Nepal. The shortage of anaesthetists was an important factor limiting surgical services, and after DA graduates were posted to zonal (50 bed) and regional (150-200 bed) hospitals the surgical case loads doubled. There are now about 40 specialist anaesthetists in the country, of which half are DA graduates, but many hospitals have only one anaesthetist. That isolation, plus lack of continuing education (CME), are important factors threatening quality of care. Recognizing the singular role of the DA programme in alleviating Nepal's shortage of anaesthetists, we conclude that it should be renewed and strengthened to meet the needs of the next decade. Techniques commonly used at the zonal level: regional, draw-over, and total IV anaesthesia, should be stressed. At the same time fresh initiatives are required in CME and higher education for the renewal of teaching staff.(ABSTRACT TRUNCATED AT 250 WORDS)

Anesthesia↗
PubMed1992

Comparison of plain with pH-adjusted bupivacaine with hyaluronidase for peribulbar block.

Fifty patients scheduled for cataract surgery under peribulbar block were randomised to receive either plain (pH 5.4) or pH-adjusted (pH 6.8 range 6.7-6.9) 0.75% bupivacaine. Hyaluronidase was added to both solutions prior to peribulbar block. The time of onset of akinesia of the globe and the need for supplementary injections were recorded by an independent observer. Patients who returned for surgery to the second eye received the alternative local anaesthetic solution for the second peribulbar block. The relative efficacy of the different anaesthetic solutions was compared in patients who underwent unilateral surgery (Group A, n = 50). In 12 patients (Group B) who underwent bilateral surgery, direct comparisons between eyes in the same patient were possible. In both groups of patients, eyes receiving peribulbar block with the pH-adjusted solution showed a shorter time to partial akinesia of the globe (P less than 0.05). However, there was no difference between the solutions in the time to complete akinesia of the globe, but the number of supplementary injections required for an effective block with the pH-adjusted solution was increased. Onset time to akinesia of the lateral and superior rectus muscles was shortened in patients receiving the pH-adjusted solution but there were minimal effects on the medial and inferior recti.

Anesthesia, Local↗
PubMed1992

Vomiting and aspiration pneumonitis with the laryngeal mask airway.

We report a case of severe aspiration pneumonitis in the dependent lung of a 74-yr-old man following Austin-Moore arthroplasty. A laryngeal mask airway provided a clear airway until anaesthesia became too light during manipulation of the fractured femoral head. Active vomiting occurred and gastric contents were "reflected" back into the trachea. Tracheal intubation and suction were immediately performed but the patient required postoperative ventilatory and inotropic support for three days.

Aged↗
PubMed1991

Gastric fluid volume and pH in elective patients following unrestricted oral fluid until three hours before surgery.

This clinical study was designed to assess the results of new preoperative fasting guidelines in which patients are instructed that they must not eat any solid food after midnight, but that they may drink unrestricted amounts of clear fluid until three hours before their scheduled time of surgery. We studied 199 healthy, elective surgical inpatients aged 18-70 yr to determine whether there was any correlation between the ingestion interval or the volume of fluid ingested, with the volume and pH of residual gastric fluid at induction of anaesthesia. Pregnant patients, and those with gastric disorders or who were taking medications that affect gastric motility or secretion, were excluded. Either no premedication was given, or oral diazepam 5-15 mg was given 90 min preoperatively. Of the 199 patients, 105 ingested 50-1200 ml on the morning of surgery. The ingestion-induction interval was less than three hours in 12 patients whose actual surgery time was ahead of schedule. The remaining 94 patients did not drink because they were scheduled for surgery before 11:00 (n = 51), they did not want to drink (n = 24), or they were advised not to drink by their nurse or surgeon (n = 16). Following induction of anaesthesia, gastric fluid was aspirated through a #18 Salem sump orogastric tube, the volume was recorded and pH was measured with a calibrated pH meter. Patients were divided retrospectively into four groups (in three of which patients ingested fluid) according to the ingestion-induction interval (1.3-3.0 hr, 3.1-5.0 hr, 5.1-8.0 hr, and nothing by mouth after midnight).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1991

Anaesthesia training and development in Nepal 1985-1990.

In 1985 a diploma program in anaesthesia was established in Kathmandu, Nepal, as a joint venture between the Institute of Medicine in Kathmandu and the University of Calgary. Development of the program and of the specialty in the capital city of Kathmandu was continuously documented during the next five years by local and visiting faculty. In 1990 teams of two Nepali and one Canadian anaesthetist also conducted a survey of each of the seven 50-100 bed zonal hospitals which did not previously have a trained anaesthetist and which are now staffed by graduates of the diploma program. In 1985 Nepal, with a population of 16 million, had seven trained Nepali anaesthetists all of whom worked in two hospitals in Kathmandu. By the end of 1989, 19 physicians had graduated. Seven of these continue to work in Kathmandu hospitals, nine work in zonal hospitals throughout the country and two are taking higher anaesthesia training in the United Kingdom. Additional Nepali anaesthetists have returned from training abroad, and the Society of Anaesthesiologists of Nepal, which joined the World Federation of Societies of Anaesthesiologists in 1988, now has 34 members. An annual anaesthesiology symposium is held, and weekly clinical meetings are organized in the major hospitals in Kathmandu. Anaesthetists who work in the zonal hospitals have limited supplies of drugs and equipment and opportunities for continuing medical education are virtually nonexistent.(ABSTRACT TRUNCATED AT 250 WORDS)

Anesthesia Department, Hospital↗