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R MacMillan

Publications and source records attributed to R MacMillan.

At least 19 recordsLinked to original sources
PubMed1994

Evaluation of the cost of laparoscopic and open cholecystectomy.

Despite the rapid growth of laparoscopic cholecystectomy, the comparative costs of this new procedure and open cholecystectomy remain unknown. In this study the costs have been evaluated of a consecutive series of patients undergoing these procedures in a district general hospital with an established resource management centre. Fifty consecutive patients undergoing open cholecystectomy between June 1988 and July 1990 immediately before the introduction of laparoscopic cholecystectomy and 100 patients undergoing laparoscopic cholecystectomy between August 1990 and June 1992 were studied. Costs estimated prospectively for each patient were compared. The mean cost per patient of open cholecystectomy was estimated at 2102 pounds compared with 2026 pounds for the first 50 patients undergoing the laparoscopic procedure. The mean cost (1744 pounds) for the second 50 patients undergoing laparoscopic cholecystectomy was less than that for either open cholecystectomy (P < 0.005) or the initial 50 laparoscopic operations (P < 0.03). Operating theatre costs and equipment costs were higher in both laparoscopic groups. These were offset by the higher nursing and ward costs of open cholecystectomy. For the laparoscopic procedure the operating theatre times and duration of hospital stay were both less in the second 50 patients than in the first 50. After the initial learning period, laparoscopic cholecystectomy is less expensive than the open operation and represents a cost-effective method for treatment of the patient with gallstones.

Adult↗
PubMed1994

Effect of the 5-lipoxygenase inhibitor ZD2138 on allergen-induced early and late asthmatic responses.

BACKGROUND: Leukotrienes are lipid mediators generated from arachidonic acid by the 5-lipoxygenase pathway which may play an important part in the pathophysiology of asthma. Previous studies have demonstrated attenuation of the allergen-induced early and late asthmatic responses by leukotriene receptor antagonists. The effect of the 5-lipoxygenase inhibitor ZD2138, a non-redox lipoxygenase inhibitor which inhibits leukotriene synthesis for 24 hours after single doses of 350 mg, on allergen-induced early and late asthmatic responses has been assessed. METHODS: Eight asthmatic subjects with baseline FEV1 > 70% were studied. On screening, all subjects developed an allergen-induced biphasic asthmatic response to grass pollen, cat dander, or house dust mite. ZD2138 (350 mg) or placebo was given on two occasions separated by two weeks in a randomised double blind fashion. Allergen inhalation challenge was performed four hours after dosing and FEV1 was measured for eight hours. The inhibitory activity of ZD2138 on the 5-lipoxygenase pathway was assessed by measurements of calcium ionophore-stimulated generation of LTB4 in whole blood ex vivo and by analysis of urinary LTE4 levels before administration of drug or placebo and at regular intervals after oral drug dosing and allergen challenge. RESULTS: ZD2138 produced no significant bronchodilatation or attenuation of the early or late asthmatic response, although there was 82% inhibition of whole blood generation of LTB4 in response to calcium ionophore stimulation and 52% reduction in urinary excretion of LTE4. CONCLUSIONS: In asthmatic subjects the 5-lipoxygenase inhibitor ZD2138 did not protect against allergen-induced asthmatic responses, despite substantial inhibition of 5-lipoxygenase.

Adult↗
PubMed1994

Effect of the 5-lipoxygenase inhibitor ZD2138 on aspirin-induced asthma.

BACKGROUND: The cysteinyl leukotrienes may play a central part in the mechanisms of aspirin-sensitive asthma. Previous work has shown that individuals with aspirin-sensitive asthma have high basal urinary LTE4 levels which increase further upon aspirin ingestion, and that sulphidopeptide leukotriene receptor antagonists attenuate aspirin-induced airflow obstruction. If the cysteinyl leukotrienes cause aspirin-induced asthmatic reactions, inhibition of the 5-lipoxygenase pathway should prevent aspirin-induced bronchospasm. This hypothesis has been tested with ZD2138, a specific non-redox 5-lipoxygenase inhibitor. METHODS: Seven subjects (four men) with aspirin-sensitive asthma with baseline FEV1 values > 67% were studied. ZD2138 (350 mg) or placebo was given on two separate occasions two weeks apart in a randomised double blind fashion. A single dose of aspirin was administered four hours after dosing and FEV1 was measured for six hours. Inhibition of the 5-lipoxygenase pathway by ZD2138 was assessed by measurements of urinary LTE4 levels and ex vivo calcium ionophore stimulated LTB4 generation in whole blood, before administration of drug or placebo and at regular time intervals after dosing and aspirin administration. RESULTS: ZD2138 protected against the aspirin-induced reduction in FEV1 with a 20.3 (4.9)% fall in FEV1 following placebo compared with 4.9 (2.9)% following ZD2138. This was associated with 72% inhibition of ex vivo LTB4 generation in whole blood at 12 hours and a 74% inhibition of the rise in urinary LTE4 excretion at six hours after aspirin ingestion. CONCLUSIONS: In aspirin-sensitive asthma the 5-lipoxygenase inhibitor ZD2138 inhibits the fall in FEV1 induced by aspirin and this is associated with substantial inhibition of 5-lipoxygenase.

Adult↗
PubMed1992

Death in hospital after head injury without transfer to a neurosurgical unit: who, when, and why?

Most studies of hospital deaths after head injury have been in patients transferred to neurosurgical units (NSU), but over 90 per cent of hospitalized head-injured patients are not transferred and some of these die. To assess the effectiveness of triage of seriously head-injured patients in Glasgow, we studied 270 patients who died after head injury in any of the six Glasgow general hospitals during 1979-1988 and who were not transferred to the regional NSU. The proportion of fatal cases of head injury who had not been to the NSU fell from 69 per cent in 1971-1975 to 45 per cent in 1979-1988. Most of the untransferred patients were elderly, and most died from irremediable injuries or complications. Although 31 (11 per cent) had a significant intracranial haematoma, only seven of these might have been salvaged by neurosurgical intervention. Seven other patients died from potentially preventable extracranial injuries or complications. These findings suggest that a relatively satisfactory level of triage of seriously head-injured patients has been achieved, by promoting effective communication between neurosurgeons and other specialists, and by a continuous programme of audit and education.

Adolescent↗
PubMed1990

Risks of acute traumatic intracranial haematoma in children and adults: implications for managing head injuries.

OBJECTIVE: To determine the factors influencing the risk of an acute traumatic intracranial haematoma in children and adults with a recent head injury. DESIGN: Prospective study of incidence of risk factors in samples of patients attending accident and emergency departments and in all patients having an acute traumatic intracranial haematoma evacuated in one regional neurosurgical unit during 11 years. SETTING: Accident and emergency departments in Scotland or Teesside and regional neurosurgical centre in Glasgow. PATIENTS: 8406 Adults and children (less than or equal to 14 years) who attended accident and emergency departments and 1007 consecutive patients who had an operation for an acute traumatic intracranial haematoma. Data were complete in 8366 and 960 patients respectively. RESULTS: Overall, children were less at risk than adults (one in 2100 v one in 348 respectively). In both age groups the presence of a skull fracture and changes in conscious level permitted identification of subgroups of patients with widely differing degrees of risk. In children the absolute risk ranged from one in almost 13,000 without a fracture or altered conscious level to one in 12 for a child in a coma and with a fracture; the pattern was similar in adults, the risks in corresponding groups ranging from one in almost 7900 to one in four. CONCLUSIONS: Although children attending hospital after a head injury have a lower overall risk of a traumatic haematoma, the main indicators of risk, a skull fracture and conscious level, are the same as in adults, and the pattern of their combined effect is similar. Guidelines for managing adults with recent head injury may therefore be applied safely to children; with the increasing provision of facilities for computed tomography they should be revised to ensure early scanning of more patients with head injury.

Acute Disease↗
PubMed1990

Head injuries in accident and emergency departments. How different are children from adults?

STUDY OBJECTIVE: The aim of the study was to examine the differences between child and adult patients attending accident and emergency departments after recent head injuries. DESIGN AND SETTING: A retrospective survey based on existing case records from 23 Scottish accident and emergency departments for 1985 was compared with prospective data from one hospital over 9 months in 1984. PATIENTS: 3838 children under 15 and 4775 adults attended hospital with head injuries during the period analysed. MAIN RESULTS: Only 9% of children and 20% of adults had evidence of brain damage (altered consciousness on arrival, or history of altered consciousness with amnesia on arrival). Scalp lacerations were recorded in approximately 40% of both children and adults, more commonly in those without brain damage. Fewer children than adults had a skull x ray; in both age groups x rays were more often done if there was evidence of brain damage, headache, or vomiting, and less often when there was a scalp laceration. Only 11% of children were admitted compared with 20% of adults. Admission rates per 100,000 population per year were 4011 for children and 1473 for adults (1967 overall); admission rates for brain damage were 290 for children and 341 for adults (331 overall). CONCLUSIONS: These are the first population based estimates of frequency of head injuries presenting at accident and emergency departments, analysed by age, gender and cause of injury. They should be of value when planning services for the head injured.

Adolescent↗
PubMed1988

Sensitivity and specificity of assessing coronary bypass graft patency with ultrafast computed tomography: results of a multicenter study.

Because a significant number of all patients seen by cardiologists have had coronary bypass surgery, a relatively noninvasive method of assessing coronary bypass graft patency would be very helpful. Ultrafast computed tomography, by virtue of its rapid data acquisition time and reasonable spatial resolution, may be useful in this regard. To determine the sensitivity, specificity and predictive accuracy of this imaging modality as compared with cardiac catheterization, a multicenter study was undertaken. There were two parts to the study. Part I involved the evaluation of 179 grafts in 74 patients studied in the five participating centers between March 1985 and August 1986. Twenty-nine percent of these graft studies were found to be technically inadequate and were excluded before patency determinations began. The remaining group of 127 bypass grafts in 62 patients had studies adequate for interpretation. Fifty-one grafts were to the left anterior descending coronary artery or a diagonal branch, 37 to branches of the left circumflex artery and 28 to the right coronary artery or a posterior descending vessel; in addition, there were 11 internal mammary artery bypass grafts primarily into the left anterior descending or diagonal artery distribution. The sensitivity of detecting angiographically open grafts was 93.4%, the specificity of detecting angiographically closed grafts 88.9% and the predictive accuracy was 92.1%. A subsequent study (Part 2) was performed 9 months later to assess the ability to carry out technically adequate examinations. Of the 138 consecutive graft examinations (50 patients) included in this part of the study, 94.2% of the examinations were found to be technically adequate.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1987

How accurately are fractures of the skull diagnosed in an accident and emergency department.

Over a 9-month period 3424 patients with a head injury were examined in the Accident and Emergency Department of Monklands District General Hospital. Casualty officers diagnosed 66 fractures of the skull on radiographs but 27 of these were subsequently reported by a radiologist as not being fractures. Of the 45 fractures reported by the radiologist 6 had been missed by the casualty officer. This study demonstrates the performance of junior medical staff who have no formal training in radiology. It emphasizes the need to instruct such staff when they are assigned to work in accident and emergency departments.

Adult↗
PubMed1987

An evaluation of open scalp wounds.

A retrospective study of 661 adult patients with open scalp wounds attending the Accident and Emergency Department of Glasgow Royal Infirmary, Glasgow, Scotland, was performed. Detailed information was recorded about history, nature of open wounds ('contused' or 'incised'), wound exploration and radiological findings. The commonest cause of injury was assault (40%), followed by falls (34%). Half of the patients had been drinking alcohol. The majority of scalp wounds were 'contused' (84%) resulting equally from assaults and falls; 'incised' wounds (16%) were more commonly due to assault. Although division of the occipitofrontalis aponeurosis was infrequent (18%), most (78%) of the skull fractures occurred in this group. Wound exploration detected nine fractures not evident on skull X-rays. To maximise fracture detection rate, careful wound exploration should be an important adjunct to skull radiography and, in particular, division of the occipitofrontalis aponeurosis should alert the casualty officer to the likelihood of a skull fracture.

Adolescent↗
PubMed1986

Rapid-acquisition computed tomography demonstration of chronic calcified pericardial constriction.

Dynamic imaging by a new ultrafast computed tomography scanner of a patient with chronic calcified pericardial constriction is presented. Images of the heart throughout the cardiac cycle demonstrate compression of the right ventricle by calcified pericardium. Hemodynamic data was derived from the scan study to support the diagnosis of pericardial constriction, which was confirmed on cardiac catheterization.

Aged↗
PubMed1985

A study of stab wounds.

A study was made of patients with stab wounds who attended the Accident and Emergency Department of Glasgow Royal Infirmary during 1978 and 1983. There were 318 patients. The majority, 304 (96%), were males. A total of 87 (27%) were teenagers. The most common sites of the wounds were the chest (143 patients) and the abdomen (113 patients). The features of the patients and their wounds are compared with those of a previous study carried out at the same hospital in the early 1960s (Batey & MacBain, 1967). The post-mortem reports of 25 fatal stab injury cases occurring in Glasgow between 1971 and 1978 are also reviewed. Some aspects of diagnosis, management and prevention of stab wounds are discussed.

Abdominal Injuries↗
PubMed1983

Urethrotomy under direct vision: the primary treatment for urethral stricture.

Urethrotomy by direct visualization is highly successful in managing urethral strictures. The authors treated 55 patients by this method between 1978 and 1982. Thirty-four had undergone multiple dilatations previously and their unanimous agreement that visual urethrotomy was less painful and accompanied by fewer complications prompted the authors to use the latter method as the primary treatment in 21 patients, on an outpatient basis. The success rate in these 55 patients was 75%. The failure rate was 7%. The remainder were improved but had recurrent strictures, though less frequently than before visual urethrotomy. Because the procedure can be done on an outpatient basis, with a high success rate and minimal morbidity, the authors conclude that urethrotomy under direct vision should be the standard primary procedure for managing all urethral strictures.

Adolescent↗
PubMed1981

Epidemiology of head injury.

To find the incidence of the various types of head injury that occur in the community separate yearly rates (per 10(5) population in Scotland) for deaths, admissions to hospital, and attendance at accident and emergency departments were estimated and compared (when possible) with rates in England and Wales and the United States. Hospital admissions provide the best data for comparing incidences in different geographical areas and rates of attendance at accident and emergency departments the most reliable guide to incidences in the community. Admission rates, however, vary with local facilities and policies, and these also determine the proportion of patients referred to regional neurosurgical units. Such epidemiological data must be sought both for planning health care for head injury and for monitoring the effectiveness of services.

Adolescent↗
PubMed1981

Head injuries at an inner city accident and emergency department.

A prospective study was carried out of 784 adults (aged 13 years and over) with recent head injuries who attended the Accident and Emergency Department of the Glasgow Royal Infirmary during an 11-week period (April-June 1978). One-third were caused by assault and only one-tenth by road traffic accidents. Half the patients had recently ingested alcohol, one-quarter of all patients had at least a brief period of post-traumatic amnesia (PTA). The overall admission rate was 28 per cent. Radiography of the skull was performed in 65 per cent and a fracture seen in 5 per cent of these. One-quarter of the patients had at least one unsatisfactory radiograph. Two patients whose fractures were initially missed on radiography were not admitted. Seven of the 24 patients with fractures had no clinical evidence of brain damage (no PTA, no impaired conscious level, no focal neurological signs or symptoms), but all had wounds of the scalp. One-third of all patients did not have radiography of the skull performed, nor were they admitted to hospital, yet one-quarter of these had some evidence of brain damage.

Adolescent↗
PubMed1979

Head injuries in three Scottish neurosurgical units. Scottish head injury management study.

The organisation of care for patients with head injuries in Scotland was investigated by studying retrospectively 785 patients admitted in 1974 and 1975 to neurosurgical units in Glasgow, Aberdeen, and Dundee. The reasons for the injuries and the patients' clinical conditions were similar in each unit. The referral practices at the hospitals containing the units were compared and found to be different from that of the unit in Edinburgh. It is concluded that patients in the Glasgow, Aberdeen, and Dundee units, which operate a similar policy for head-injured patients, are in general similar. Transferring to a neurosurgical unit only selected patients rather than all patients with head injuries is safe practice only if policies are agreed with primary surgeons and patients can be transferred without delay.

Adolescent↗