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Biomedical subjects

D F Ettles

Publications and source records attributed to D F Ettles.

At least 19 recordsLinked to original sources

Chronic haematoma or soft-tissue neoplasm? A diagnostic dilemma.

Chronic soft-tissue haematomas are infrequently reported in the literature. We present a case of a slowly expanding post-traumatic chronic soft-tissue haematoma located anterior to the knee and leg, occurring in a region previously unreported. Both clinically and radiologically, it was impossible to distinguish the haematoma from an aggressive soft-tissue neoplasm. We review the literature and discuss the diagnostic problems related to this uncommon presentation.

Aged↗

Subclavian vein compression in anaplastic carcinoma of the thyroid.

Anaplastic thyroid cancer is a condition with a dismal prognosis in most cases. We present a case of subclavian vein compression in a case of anaplastic thyroid carcinoma treated with subclavian venous stenting. Subclavian vein compression is a recognized complication in disseminated carcinomatosis particularly in carcinoma of the breast and bronchus. It has never been described in anaplastic thyroid carcinoma.

Aged↗

Fibroid calcification after uterine artery embolization: ultrasonographic appearance and pathology.

PURPOSE: To describe the ultrasonographic (US) appearance of fibroid calcification occurring after uterine artery embolization (UAE) and discuss its etiology and pathology. MATERIALS AND METHODS: Twenty-seven of a total of 38 patients were followed up clinically and with duplex US for longer than 6 months after UAE for uterine fibroids. At US, changes in uterine size, fibroid vascularity, and morphology have been recorded. Pathologic studies were performed by one of the authors on resected specimens from a different cohort of patients, at intervals ranging from 4 months to 1 year after UAE. RESULTS: Twenty patients reported complete resolution of symptoms. In 16 of these, a reduction in fibroid volume of 70%-85% was recorded and, at US, the development of a peripheral hyperechoic rim around an increasingly hypoechoic fibroid was noted. Computed tomography in two patients revealed it to be a rim of calcium. Histologic studies in a different cohort of patients who had undergone hysterectomy at variable intervals after UAE demonstrated early aggregation of polyvinyl alcohol (PVA) particles, an intermediate giant cell inflammatory reaction, and calcification in the periphery of the infarcted fibroid at 6-12 months. CONCLUSION: Calcification is the end stage of hyaline degeneration. However, its peripheral location is unlike that of natural fibroid involution and hyaline necrosis. Pathologic studies in resected human fibroids after embolization suggest that its development is the end result of aggregation of PVA particles in peripheral fibroid arteries.

Adult↗

Recurrent superior vena caval obstruction due to invasion by malignant thymoma: treatment using a stent-graft.

A stent-graft was used to palliate superior vena caval obstruction in a 50-year-old patient with histologically proven ingrowth of malignant thymoma through three previously inserted non-covered stents. The stent-graft is still patent 12 months later. This is the first report of such a procedure where histological evidence of tumour ingrowth is available and long-term patency is verified.

Female↗

Long-term follow-up of the Bird's Nest IVC Filter.

AIM: This study is a long-term clinical follow-up of the Bird's Nest Filter which addresses issues such as caval patency, filter integrity, morbidity and mortality. MATERIALS AND METHODS: 78 consecutive patients with Bird's Nest Filters inserted between 1989 and 1994 were recalled for clinical assessment and imaging follow-up. Pre- and post-filter medical histories were obtained from the patients and their medical records. They were examined for clinical signs of inferior vena cava occlusion. Imaging follow-up was by plain abdominal radiography, colour duplex ultrasound and computed tomography. RESULTS: 52 patients were alive and well at 4-6 years. Thirty-day mortality was 5.1%. Three-year mortality was 19.2%. Recurrent pulmonary embolus occurred in 1.3%. IVC occlusion was demonstrated in 4.7%. No evidence of filter migration was seen. Wire prolapse occurred in 70% on abdominal X-ray and asymptomatic performation of the caval wall in 85.3% on CT. Morbidity and mortality were the same whether the patient was anticoagulated or not. CONCLUSION: The Bird's Nest Filter is safe and effective in both the short and long term.

Adult↗

Transcatheter coil embolotherapy: a safe and effective option for major colonic haemorrhage.

BACKGROUND: The management of major colonic bleeding is problematic. A proportion of patients require emergency surgery which is associated with high morbidity and mortality. Percutaneous embolotherapy, previously considered a high risk procedure in the colon, may provide an alternative treatment in this group of patients. AIMS: To assess the safety and efficacy of embolotherapy in the treatment of life threatening colonic haemorrhage. PATIENTS AND METHODS: Thirty eight patients with fresh haemorrhage per rectum were referred for surgery because of failed conservative treatment. All underwent angiography; in 14 a bleeding site or vascular abnormality was detected. A coaxial catheter was directed to the most distal bleeding artery and this was embolised with platinum coils. RESULTS: Detection of a bleeding site correlated with haemodynamic stability at the time of angiography (r = 1 for a systolic blood pressure less than 100 mm Hg). Bleeding sites or vascular abnormalities were detected and embolised in 14 patients (37%). In 12/14 there was immediate and sustained haemodynamic improvement; two continued to bleed and required emergency hemicolectomy (14%). Three developed ischaemic complications (21.4%); these were managed conservatively and required no intervention. The 30 day mortality was 7.1% in the embolotherapy group and 10.5% in the overall group of 38 patients. CONCLUSION: Colonic embolotherapy for life threatening haemorrhage is an effective, relatively safe procedure with a low incidence of major complications. Its use depends on the identification of a focal bleeding point or vascular abnormality, which in turn depends on the haemodynamic stability of the patient at the time of angiography.

Aged↗

Tophaceous gout of the spine causing spinal cord compression.

Tophaceous gout of the spine rarely causes spinal cord compression. Only eight cases have been reported previously. We report a further case presenting with progressive quadriparesis caused by gouty tophi at C1, treated successfully by decompressive laminectomy and internal fixation. This case and the previously reported cases are reviewed.

Adult↗

Angiographic prediction of dissection followed by ischaemic complications during coronary angioplasty.

Ischaemic problems occur in about 8% of coronary angioplasties and are the major cause of morbidity and mortality associated with the procedure. Although the ischaemic event is usually due to acute vessel closure due to vessel dissection, it is noteworthy that 80-90% of radiographically visible dissections cause no problem. We have reviewed 200 consecutive coronary angioplasties in order to find predictive factors for those patients likely to suffer dissection followed by ischaemic complications. Thirty-four (17%) of the patients undergoing coronary angioplasty had radiographically visible dissections, of whom 12 (35%) suffered ischaemic complications. There were 16 (8%) major ischaemic complications following angioplasty. In four of these cases no obvious dissection was visible within the vessel. Eight out of a subgroup of 16 patients who had sequential stenoses along one vessel dilated at angioplasty had a dissection. Six of these eight patients suffered a major ischaemic complication following the dissection. Thus in this group of patients, sequential stenosis not only conferred a high probability of dissection during angioplasty but additionally carried an increased risk of ischaemic complications following the dissection. Awareness of this may affect case selection and may indicate the need for early re-examination of the vessel should problems occur following angioplasty.

Aortic Dissection↗

The use of transoesophageal echocardiography for detecting early recurrence of atrial myxoma.

A comparison between praecordial and transoesophageal cross-sectional echocardiography was undertaken in the follow-up of 14 patients who had previously undergone surgical excision of atrial myxoma. The mean interval between surgery and follow-up was 39 months. Evidence of recurrent tumour was seen in two patients by transoesophageal echocardiography but went undetected in one of these using the praecordial approach. Clear visualisation of the atria and interatrial septum was possible in all remaining cases using transoesophageal echocardiography and this allowed confident exclusion of tumour recurrence. Using praecordial echocardiography, technically inadequate studies meant that this was not possible in 4 patients. The significant late recurrence rate of excised atrial myxomas, emphasises the need for serial, postoperative echocardiographic studies. Praecordial echocardiography may be unreliable in the detection of recurrent atrial myxoma in its early stages and for this reason transoesophageal echocardiographic follow-up is justified in high risk patients.

Echocardiography↗

The value of transesophageal echocardiography in the investigation of acute prosthetic valve dysfunction.

When patients present with suspected prosthetic valve dysfunction, investigation is usually instituted to delineate the site and cause thereof. Precordial cross-sectional echocardiography is often helpful in this respect, but in the patient with acute pulmonary edema, imaging may be impaired because of discomfort and respiratory distress. The information obtained may also be suboptimal as a result of concomitant obesity, chest wall deformity, and pulmonary disease. In addition, further difficulties may relate to the acoustic shadowing produced by the metallic portion of the valve and its sewing ring, especially with valves in the mitral position. In such patients, cardiac catheterization may cause further decompensation and is associated with a recognized increase in morbidity and mortality. Angiography does not accurately site regurgitant jets in relation to the prosthetic valve concerned and will not detect the presence of vegetations. Transesophageal echocardiography circumvents many of these imaging difficulties and we evaluated its use in five patients with prosthetic heart valves who presented acutely ill, in severe pulmonary edema and suspected prosthetic heart valve failure. In each case, the diagnosis of valve dysfunction was established, and precise information regarding the site and cause of the failure was obtained. No complications or deterioration in patient condition resulted from the procedure and the findings were confirmed at surgery performed within 24 hours in all five patients. Transesophageal echocardiography should be included in the assessment of acute prosthetic heart valve failure.

Acute Disease↗

Recurrent cardiac myxoma: the surgical implications of two distinct groups of patients.

15 consecutive cases where patients (11 female, 4 male) had undergone surgical excision of cardiac myxoma were reviewed. The 11 survivors were re-assessed by trans-oesophageal echocardiography and recurrent myxoma was detected in 2 patients. These two were the only patients who had originally presented with multiple myxomas. Analysis of these cases in conjunction with 26 previously reported cases of recurrence identifies two distinct groups of patients. In one group (12 cases, mean age 48.7 years) recurrence occurred at the site of previous excision, typically following the removal of a single septal myxoma by partial thickness excision. In the second group, which includes our two cases, (16 cases, mean age 30.6 years) recurrent myxoma was found distant to the site of previous excision, typically in younger patients who had multiple myxomas at original operation. These results suggest that 1) single myxomas should be removed by full thickness excision 2) in younger patients with multiple myxomas surgery should be as radical as possible.

Adult↗

Fatal acute left ventricular outflow obstruction due to interventricular septal haematoma--diagnosis by transoesophageal echocardiography.

We describe a case of fatal left ventricular outflow obstruction detected by intraoperative transoesophageal echocardiography. This resulted from acute haematoma formation within the interventricular septum following internal mammary artery grafting to the left anterior descending coronary artery. This unusual case highlights the emerging role of transoesophageal echocardiography in the diagnosis and management of the complications of cardiac surgery.

Echocardiography, Doppler↗

Reproducibility and persistence of abnormal transmitral flow velocity patterns detected by pulsed Doppler ultrasound.

This prospective study examines the reproducibility and persistence of abnormal transmitral flow detected using pulsed Doppler ultrasound on 2 separate occasions between 2 days and 6 weeks apart. The 22 patients included were accepted consecutively from those having an abnormal diastolic flow pattern at initial examination. Abnormal flow velocity patterns were defined as those exhibiting reversal of the ratio of the passive filling velocity (E) and active atrial transport velocity (A). There was no significant difference between the separately recorded values for the ratio of the peak E and A velocities or of the ratio of the planimetered areas beneath each of the velocity waves, with positive correlations for both sets of values (r = 0.68, r = 0.67). Significant positive correlation also existed between the mean rates of acceleration to each of the E and A velocity peaks of the transmitral waveform recorded on separate occasions (r = 0.68, r = 0.95). Interobserver variation for the analysis of hard-copy pulsed Doppler recordings between two trained observers was less than 5% and intraobserver error for recording analysis was less than 2% for both observers. Abnormal transmitral flow velocity patterns persist unchanged in the absence of therapeutic intervention and the acceptably small observer error in the recording and analysis of such flow patterns allows consistent and clinically reliable data to be obtained.

Adolescent↗

Can left ventricular end-diastolic pressure be estimated non-invasively?

The relationship between the velocity waveforms due to the early and late phases of ventricular filling recorded by pulsed Doppler changes with abnormalities of left ventricular diastolic function and it has previously been suggested that quantitative assessment of these changes may provide a clinically useful estimate of left ventricular end-diastolic pressure. Pulsed Doppler ultrasound was used to record transmitral blood flow velocities simultaneously and on the same recorder as left ventricular pressure measurements in 30 patients undergoing cardiac catheterisation for the investigation of ischaemic heart disease. Contrary to previous reports we found no relationship between transmitral flow and left ventricular end-diastolic pressure. Caution is required in the conclusions drawn from transmitral flow velocity patterns whose relationship to left ventricular end-diastolic pressure remains uncertain.

Blood Flow Velocity↗