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Biomedical subjects

R K Firmin

Publications and source records attributed to R K Firmin.

At least 19 recordsLinked to original sources

Isolated sternal fracture: an audit of 10 years' experience.

We have reviewed 162 consecutive cases of sternal fracture admitted to the Leicester Royal Infirmary over a 10 year period. There were no incidences of cardiogenic shock or arrhythmia developing in patients who had sustained an isolated sternal fracture, irrespective of the aetiology. There were three deaths, three ITU admissions and one arrhythmia, all occurring in patients with severe thoracic injuries, or other associated injury. Our series confirms the observations of other authors, that patients with isolated sternal fractures, especially those sustained by car occupants wearing seatbelts, do not develop myocardial pump failure or arrhythmias as a late or occult phenomenon and can often be discharged home if there is no clinical evidence of cardiac failure and a 12-lead ECG is normal.

Accidental Falls

Role of ECMO in the treatment of respiratory syncytial virus bronchiolitis: a collaborative report.

AIM: To report the collaborative experience of extracorporeal membrane oxygenation (ECMO) in the treatment of respiratory syncytial virus (RSV) bronchiolitis between April 1989 and January 1995. METHODS: The medical records of patients with confirmed RSV bronchiolitis referred to three centres (Leicester, Glasgow, and Great Ormond Street) were reviewed. RESULTS: Twenty four infants were identified. Seventeen had been born prematurely (gestational range 23-40 weeks, median 30 weeks). Thirteen infants had been mechanically ventilated after birth and seven of these had evidence of bronchopulmonary dysplasia (BPD). The age of onset of RSV infection varied from three to 64 weeks (mean 17.4 weeks, median 12 weeks). Ventilation before ECMO ranged from one to 16 days and oxygenation indices at the time of referral ranged from 21-73 (mean 39). Ribavirin was used in eight of the 24 patients. Sixteen patients received venoarterial and eight veno-venous ECMO. ECMO hours ranged from 32-647 (median 196 hours). One infant died (survival rate 96%). Cranial ultrasound abnormalities were detected in three patients. However, at follow up only one of the 23 survivors had evidence of developmental delay. CONCLUSION: A group of paediatric patients in whom ECMO can be of benefit has been identified. The use of ECMO should be considered when other means of support prove unsuccessful.

Age of Onset

Bronchopulmonary infection with Moraxella catarrhalis in infants requiring extracorporeal membrane oxygenation.

Moraxella (formerly Branhamella) catarrhalis is now a well-recognized pathogen of the upper and lower respiratory tract. Four pediatric cases of life-threatening pneumonia requiring extracorporeal membrane oxygenation are presented. M. Catarrhalis was isolated within 48 hours of admission in three of the cases and within 24 hours of an acute deterioration in the fourth. We conclude that M. catarrhalis is either a significant pathogen in its own right, a marker of severe disease, or a secondary invader.

Child, Preschool

Varicella pneumonitis: a role for extra-corporeal membrane oxygenation?

Pneumonitis is the most serious complication of varicella zoster infection and may be fatal despite antiviral therapy and assisted ventilation. We report two cases of varicella pneumonitis which were complicated by severe pneumonitis. Both patients deteriorated on maximal ventilatory support and were then given extra-corporeal membrane oxygenation (ECMO) and recovered. One patient subsequently developed lymphoma and the other was found to have an immunoglobulin subclass deficiency. ECMO should be considered for patients with varicella pneumonitis who do not respond to conventional treatment. Those with severe pneumonitis should be investigated for underlying immunodeficiency.

Adult

Pathological complications of non-survivors of newborn extracorporeal membrane oxygenation.

The pathology was reviewed of the early deaths identified from the first 50 neonates treated with extracorporeal membrane oxygenation (ECMO) during its introduction to the UK. Fifteen neonates died during or shortly after ECMO between August 1989 and June 1992. Data on 12 are presented (three did not have a postmortem examination). The clinical diagnoses at referral for ECMO were as follows: persistent pulmonary hypertension of the newborn (six infants), primary congenital pneumonia (one infant), community acquired pneumonia (two infants), birth asphyxia (one infant), respiratory distress syndrome (one infant), and meconium aspiration syndrome (one infant). In our group, at necropsy, five had significant haemorrhage (three intracranial, one pulmonary, one pericardial and intraventricular). Three of five infants with evidence of haemorrhage also had signs of sepsis. Six infants had evidence at necropsy of systemic sepsis, five showed evidence of severe anoxic brain injury, and four infants had cerebellar haemorrhages. Three infants had evidence of myocardial ischaemia. It is difficult to discriminate between the relative influence of the primary diagnosis, the mode of treatment, and the severity of presentation in the genesis of this pathology. It is likely that the extent and severity of some of the findings represent a pathological progression that would have been interrupted by the death of the patient, had ECMO not been instituted.

Acute Kidney Injury

False aneurysm of the right ventricular outflow tract after total correction of tetralogy of Fallot: diagnosis by echocardiography and successful repair by neck cannulation for cardiopulmonary bypass.

A case of false aneurysm related to the left side of the heart with a connection to the right ventricular outflow tract was found by echocardiography after complete repair of tetralogy of Fallot. Cardiopulmonary bypass was established by cannulating the right internal jugular vein and the ipsilateral common carotid artery. The aneurysm was then excised and the right ventricular outflow tract reconstructed by direct sutures.

Aneurysm, False

Childhood pulmonary alveolar proteinosis. Extracorporeal membrane oxygenation with total cardiopulmonary support during bronchopulmonary lavage.

Partial cardiopulmonary bypass with extracorporeal membrane oxygenation to allow bilateral bronchopulmonary lavage in pulmonary alveolar proteinosis has been described. However, this technique is complicated by a very low arterial PO2 and cardiovascular embarrassment. Total cardiopulmonary support avoids these problems and was successfully used in a 2 1/2-year-old girl.

Cardiopulmonary Bypass

Prolonged suction drainage prevents serous wound discharge after cardiac surgery.

A series of 180 patients was randomised to two groups after median sternotomy performed for cardiac surgery in order to evaluate the effect of suction drainage on serous wound discharge. In group A all wounds were drained using two conventional mediastinal drains, while in group B one suction drain and one conventional mediastinal drain were employed. Five patients developed serous wound discharge in group B compared with 14 in group A (chi 2, P < 0.02). There were no significant differences between the rates of major wound infection (group A, n = 1; group B, n = 1) or the incidence of postoperative pericardial effusion assessed by echocardiography (group A, n = 10; group B, n = 5).

Adult

Intrahepatic leiomyosarcoma of the inferior vena cava with extension into the right atrium.

We present a case of leiomyosarcoma of the intrahepatic inferior vena cava extending into the right atrium, that has been successfully palliated by removal of the obstructing tumour under conditions of full cardiopulmonary bypass and circulatory arrest. Lesions of this kind have previously thought not to be amenable to surgery. Although resection was incomplete, successful palliation may be achieved facilitating this technique.

Heart Atria

Early results of combined carotid endarterectomy and coronary artery bypass grafting in patients with severe coronary and carotid artery disease.

The management of patients with carotid artery disease who require coronary artery bypass grafting (CABG) remains controversial. Several published series from the USA (including one with prospective randomization) advocate a combined approach of carotid endarterectomy (CEA) followed immediately by coronary artery bypass surgery. However, experience of combined carotid endarterectomy and coronary bypass grafting has not been previously reported by a centre from the United Kingdom. Between 1986 and 1991 we performed this combined procedure on 18 patients who required myocardial revascularization and had co-existing severe (> 70%) carotid stenosis. Sixteen patients (89%) had angina and 11 patients (61%) had symptomatic carotid artery disease. The perioperative mortality was 5.5% and the ipsilateral perioperative stroke rate was 5.5%. These early results are encouraging and suggest that further evaluation of combined carotid endarterectomy and coronary artery bypass surgery is warranted.

Adult

The management of cardiac trauma by general surgeons in non-cardiothoracic units.

Cardiac trauma requiring immediate surgical intervention is usually thought of as a rare event. However, our recent experience at Leicester Royal Infirmary suggests that this clinical situation is on the increase, and has highlighted potential problems in the management of these patients. It is essential that all units that may have to deal with these patients have the necessary facilities and equipment to perform an emergency thoracotomy in the Accident and Emergency department, and that the medical and nursing staff involved have been properly trained to deal with these life-threatening emergencies.

Adolescent

UK experience in neonatal extracorporeal membrane oxygenation.

Extracorporeal membrane oxygenation (ECMO) is a life support technique capable of supporting pulmonary, cardiac, or cardiopulmonary function. It has proved most successful in neonatal respiratory failure. We report the initial UK experience with a survival rate of 80% in 15 neonates (gestations 36-41 weeks, birth weights 2690-3990 g) whose condition exceeded American criteria for ECMO treatment for a prolonged period before referral. Ages at referral varied from 11 to 240 hours and the duration of bypass required varied from 30 to 240 hours respectively.

Costs and Cost Analysis