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Biomedical subjects

A S McIntyre

Publications and source records attributed to A S McIntyre.

41 records · Page 3Linked to original sources
PubMedDate not supplied

Duplex Doppler ultrasound identifies veins suitable for insertion of central feeding catheters.

Central venous access for feeding catheters may prove difficult in patients who have had numerous previous central line insertions or complications. Duplex Doppler ultrasound was used to identify the anatomy and patency of major central veins in 11 patients in whom attempts at obtaining central venous access by an experienced operator had failed at least once and in 40 control subjects. Doppler ultrasound demonstrated the subclavian veins (diameter 12.5 +/- 3.5 mm, mean +/- SE) and internal jugular veins (11 +/- 3.5 mm) in all the control subjects. In the patients, 18 of 44 veins were patent, 11 were small or had low blood flow, and 15 were thrombosed. In 7 patients who required central feeding catheter insertion, a suitable vein was identified and the catheter suitably placed, even in 3 subjects where no central vein was considered normal. Duplex Doppler ultrasonography is a useful technique for identifying veins suitable for the insertion of central venous lines when access has previously proved difficult.

Adult↗
PubMedDate not supplied

Barium enema or colonoscopy for the investigation of iron deficiency anaemia?

OBJECTIVE: To determine whether double contrast barium enema is adequate for excluding carcinoma of the colon in patients with iron deficiency anaemia. DESIGN: Prospective audit. SUBJECTS: One hundred and twenty-three patients with iron deficiency anaemia. INTERVENTION: All patients had upper intestinal (GI) endoscopy, duodenal biopsy and double contrast barium enema. Malignant disease and other GI pathology were treated. Patients with recurrent or persistent anaemia at follow-up were colonoscoped. OUTCOME MEASURE: Colon cancer missed on barium enema examination but detected on colonoscopic examination. RESULTS: An identified GI lesion contributing to their anaemia and 11 colon cancers were found in 71% of patients, all identified on barium enema. Two pre-cancerous conditions were missed on barium enema examination. Only 45% colonoscopies inspected the caecum. CONCLUSION: Double contrast barium enema with sigmoidoscopy is probably sufficient for excluding carcinoma of the colon in iron deficiency anaemia.

Adolescent↗