Biomedical subjects

D W Waite

Publications and source records attributed to D W Waite.

3 recordsLinked to original sources

PubMed1993

Technical note: computed tomographic dacryocystography.

The technique of computed tomographic dacryocystography is described. It was developed in response to the pre-operative imaging requirements for transnasal endoscopic dacryocystorhinostomy, a new minimally invasive operation performed as a primary procedure to relieve epiphora. However, it is also helpful in the assessment of patients after failed conventional external dacryocystorhinostomy when the information provided will help to determine the subsequent surgical approach. In addition the technique will assist surgical planning in cases of epiphora associated with sinus surgery, facial trauma and maxillofacial tumours by determining the site and extent of pathology.

Dacryocystorhinostomy↗

PubMed1992

Double blind comparison of Iomeprol 350 and Iopamidol 340 in intravenous digital subtraction angiography for peripheral vascular disease.

A randomized double blind study was undertaken to compare the diagnostic efficacy and side effects of a new non-ionic contrast medium Iomeprol with a commonly used one--Iopamidol. Visual and densitometric comparison was made of intravenous digital subtraction angiograms performed for peripheral vascular disease. The results show the two media to be similar both in imaging quality and in the incidence of associated side effects. Ninety-eight per cent of the intravenous digital subtraction angiograms were assessed as adequate for clinical management by the vascular surgeon.

Adult↗

PubMed1975

Posterior mediastinal venous masses in patients with portal hypertension.

Of 304 consecutive splenic venograms performed for suspected portal hypertension, oesophageal collateral veins were filled in 145. In seven patients massively dilated paraoesophageal collaterals were visible on the plain chest radiograph as a retrocardiac posterior mediastinal mass. Erect and supine radiographs have been compared in four patients, and the Valsalva and Mueller manoeuvres performed in one patient. The size of the masses was unchanged by these procedures, which were therefore of no value in differential diagnosis. The mass was still present immediately after portocaval anastomosis in one patient, but in another is no longer seen on radiographs taken seven years postoperatively. All seven patients also had submucosal oesophageal varices and therefore the barium swallow remains the most useful study to clarify the nature of a retrocardiac mass. Correct identification of pseudotumoural venous collaterals may avoid unnecessary further investigation.

Adult↗