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Biomedical subjects

C A McLaren

Publications and source records attributed to C A McLaren.

14 recordsLinked to original sources
PubMed2005

Computed tomography versus bronchography in the diagnosis and management of tracheobronchomalacia in ventilator dependent infants.

AIM: To assess the relative accuracy of dynamic spiral computed tomography (CT) compared with tracheobronchography, in a population of ventilator dependent infants with suspected tracheobroncho-malacia (TBM). SETTING: Paediatric intensive care unit in a tertiary teaching hospital. PATIENTS AND METHODS: Infants referred for investigation and management of ventilator dependence and suspected of having TBM were recruited into the study. Tracheobronchography and CT were performed during the same admission by different investigators who were blinded to the results of the other investigation. The study was approved by the hospital research ethics committee, and signed parental consent was obtained. RESULTS: Sixteen infants were recruited into the study. Fifteen had been born prematurely, and five had cardiovascular malformations. In 10 patients there was good or partial correlation between the two investigations, but in six patients there was poor or no correlation. Bronchography consistently showed more dynamic abnormalities, although CT picked up an unsuspected double aortic arch. Radiation doses were 0.27-2.47 mSv with bronchography and 0.86-10.67 mSv with CT. CONCLUSIONS: Bronchography was a better investigation for diagnosing TBM and in determining opening pressures. Spiral CT is unreliable in the assessment of TBM in ventilator dependent infants. In addition, radiation doses were considerably higher with CT.

Bronchial Diseases↗
PubMed1991

Intertrochanteric fractures of the femur: a randomized prospective trial comparing the Pugh nail with the dynamic hip screw.

Over a 14-month period, 100 consecutive cases of intertrochanteric fracture were randomly allocated to be treated by either Pugh nail-plate or Dynamic Hip Screw (DHS) fixation. Although there were 11 cases of malreduction and/or suboptimal positioning of the fixation device in the femoral head, only two of these gave long-term problems. Despite the difference in configuration of the devices and a considerable disparity in price, patient satisfaction and the incidence of untoward radiological features at an average of 6 months after surgery were similar in the two groups. A trifin-ended device would thus appear to be a reliable alternative to the more commonly used hip screw systems for intertrochanteric fracture.

Aged↗
PubMed1989

Pes planus after tibial osteotomy.

When 100 patients who had had a high tibial osteotomy for monocompartmental arthritis were reviewed, 15 were found to have evidence of neurological impairment. A severe symptomatic pes planus deformity of the ipsilateral limb had developed in 4 patients within months of surgery. Electromyographic results showed evidence of dysfunction in the territory of the posterior tibial nerve in all 4 patients, and, in 3 there was evidence of deep peroneal nerve damage. All had surgery for varus malalignment.

Ankle Joint↗
PubMed1988

Propofol for inpatient dental anaesthesia. A comparison of propofol as sole anaesthetic agent with thiopentone and halothane for inpatient dental anaesthesia.

The induction, maintenance and recovery characteristics of propofol anaesthesia were compared with thiopentone induction and halothane maintenance in 51 spontaneously breathing, intubated patients who underwent dental surgery. Induction with thiopentone produced fewer side effects than propofol, notably pain on injection. Control of the depth of anaesthesia was better in patients who breathed halothane than in those who received intermittent bolus doses of propofol. Recovery characteristics of the two groups were similar.

Adult↗
PubMed1987

Ankle fractures in the elderly: nonoperative or operative treatment.

One hundred consecutive patients over the age of 60 years with unstable fractures of the ankle were retrospectively reviewed. Fifty were treated operatively and 50 nonoperatively. The mean follow-up was 7 years (2-16 years). Satisfactory reduction was a prerequisite in both groups. Patient satisfaction with regard to pain, deformity, and stability was significantly better in the operated group. The high proportion of poor final results in the nonoperatively treated group correlated well with malunion and nonunion.

Aged↗
PubMed1987

Galeazzi fractures in children.

We have reviewed 41 children under 15 years of age with a fracture of the radius and disruption of the inferior radio-ulnar joint. Despite the fact that the joint injury had not at first been recognised in 41% of cases and a variety of treatments had been used, the final results of conservative management were generally good. The more distal the radial fracture, the greater were the problems encountered.

Adolescent↗
PubMed1984

Partial closure and other techniques in pilonidal surgery: an assessment of 157 cases.

The report is a retrospective study of 157 patients with pilonidal disease. The period in hospital, the healing time, and the rates of wound breakdown and sinus recurrence were documented following four different methods of management. After incision and drainage of the pilonidal abscess, later excision was necessary in less than 40 per cent of patients. Elective excision of the granulation tissue and skin, with partial closure of the defect, gave better results than excision and primary suture.

Adolescent↗