| nasal obstruction | Any hindrance to the passage of air into and out of the nose. The obstruction may be in the nasal vestibule, fossae, or other areas of the nasal cavity. (12 Dec 1998) |
|---|---|
| superior vena cava obstruction | <cardiology, oncology> Blockage or narrowing of the superior vena cava, the major vein draining the upper body. May result from lymphoma, liver tumours, tuberculosis, histoplasmosis and aortic aneurysm. (19 Jan 1998) |
| duodenal narrowing or obstruction | <radiology> Congenital (see double bubble sign), duodenal atresia: neonatal presentation, annular pancreas: infants or adults, duodenal web/diaphragm, Ladd's bands, duplication cyst, inflammatory, postbulbar ulcer, Crohn disease, infections: TB, Strongyloides, pancreatitis, pancreatic pseudocyst, radiation injury, malignant, duodenal adenocarcinoma/lymphoma, pancreatic carcinoma, metastatic disease, traumatic, intramural haematoma, vascular, superior mesenteric artery syndrome (12 Dec 1998) |
| intestinal obstruction | <surgery> A blockage of the bowel lumen prohibiting the passage of material. Common symptoms include constipation, abdominal swelling and abdominal pain. Treatment includes intravenous fluids, rest, nasogastric suction and surgery in select cases. (27 Sep 1997) |
| intestinal pseudo-obstruction | <radiology> Chronic idiopathic intestinal pseudo-obstruction, autosomal dominant, variable penetrance, insidious onset in child or young adult, intermittent episodes, dysphagia, vomiting, abdominal pain/distention, diarrhoea, constipationn, small bowel involvement most common, megaduodenum, ileus simulating obstruction (12 Dec 1998) |
| obstruction | 1. The act of blocking or clogging. 2. The state or condition of being clogged. Origin: L. Obstructio (18 Nov 1997) |
| ureteropelvic junction obstruction | <urology> A blockage of a ureter in the region where the ureter enters the anatomic pelvis (close to the bladder). This is caused most often by a kidney stone but can also be caused by external (or internal) compression from a tumour. (27 Sep 1997) |
| ureteropelvic obstruction | A blocking or stenosis, usually congenital, at the junction of the renal pelvis and ureter, usually resulting in stasis, pelvocaliectasis, hydronephrosis, or calyceal clubbing. (05 Mar 2000) |
| ureterovesical obstruction | Obstruction of the lower ureter at its entrance into the bladder. (05 Mar 2000) |
| urethral obstruction | Obstruction anywhere along the urethra. (12 Dec 1998) |
| lacrimal duct obstruction | Interference with the secretion of tears by the lacrimal glands. Obstruction of the lacrimal sac or nasolacrimal duct causing acute or chronic inflammation of the lacrimal sac (dacryocystitis). It is caused also in infants by failure of the nasolacrimal duct to open into the inferior meatus and occurs about the third week of life. In adults occlusion may occur spontaneously or after injury or nasal disease. (12 Dec 1998) |
| anaesthesia, closed-circuit | Inhalation anaesthesia where the gases exhaled by the patient are rebreathed as some carbon dioxide is simultaneously removed and anaesthetic gas and oxygen are added so that no anaesthetic escapes into the room. Closed-circuit anaesthesia is used especially with explosive anaesthetics to prevent fires where electrical sparking from instruments is possible. (12 Dec 1998) |
| closed anaesthesia | Inhalation anaesthesia in which there is total rebreathing of all exhaled gases, except carbon dioxide which is absorbed; gas flow into the anaesthetic circuit consists only of oxygen, in amounts equal to the patient's metabolic consumption, plus small amounts of other gases (e.g., nitrous oxide) which undergo continued uptake by and distribution in the patient. (05 Mar 2000) |
| closed-angle glaucoma | angle-closure glaucoma |
| closed bite | <dentistry> A malocclusion where your upper teeth cover your lower teeth when you bite down. This is also called a deep bite. (08 Jan 1998) |