| DAST | drug abuse screening test; drug and alcohol screening test |
|---|---|
| DCT | direct Coombs' test; discrete cosine transform; distal convoluted tubule; diurnal cortisol test; dyn... |
| DEST | Denver Eye Screening Test; dichotic environmental sounds test |
| DPT | Demerol, Phenergan, and Thorazine; dermatopontin; dichotic pitch discrimination test; diphtheria-per... |
| DST | desensitization test; dexamethasone suppression test; dihydrostreptomycin; disproportionate septal t... |
| halo sign of hydrops | A discredited roentgenographic sign of foetal hydrops caused by scalp oedema so that a definite corona surrounds the skull. (05 Mar 2000) |
|---|---|
| hamman sign | <radiology> Crackles heard in left lateral decubitus position, indicates (+) pneumomediastinum (12 Dec 1998) |
| Hamman's sign | <clinical sign> A crunching, rasping sound, synchronous with heart beat, heard over the precordium and sometimes at a distance from the chest in mediastinal emphysema. (05 Mar 2000) |
| Saenger's sign | <clinical sign> A lost light reflex of the pupil returns after a short time in the dark, noted in cerebral syphilis but absent in tabes dorsalis. (05 Mar 2000) |
| Hegar's sign | <clinical sign> Softening and compressibility of the lower segment of the uterus in early pregnancy (about the seventh week) which, on bimanual examination, is felt by the finger in the vagina as though the neck and body of the uterus were separated, or connected by only a thin band of tissue. (05 Mar 2000) |
| Heim-Kreysig sign | <clinical sign> In adherent pericardium, an indrawing of the intercostal spaces, synchronous with the cardiac systole. Synonym: Kreysig's sign. (05 Mar 2000) |
| Helbings' sign | <clinical sign> A malalignment of the Achilles tendon associated with a valgus deformity of the os calcis. (05 Mar 2000) |
| prodromic sign | <clinical sign> A sign that appears during the prodrome of a disease. Synonym: antecedent sign. (05 Mar 2000) |
| sandwich sign | <radiology> Ultrasound: hypoechoic solid mass, around central linear hyperechoic area, CT: soft-tissue density surrounding bowel, most likely to be lymphomatous involvement of mesentery (12 Dec 1998) |
| Sansom's sign | <clinical sign> In mitral stenosis, apparent duplication of the second heart sound. (05 Mar 2000) |
| Hennebert's sign | <clinical sign> Nystagmus produced by pressure applied to a sealed external auditory canal; may be seen in labyrinthine fistula or with intact tympanic membrane in syphilitic involvement of the otic capsule. (05 Mar 2000) |
| Schapiro's sign | <clinical sign> In myocardial weakness, no slowing of the pulse occurs when the patient lies down. (05 Mar 2000) |
| Schlesinger's sign | In tetany, spasm both of the extensor muscles of the knee and of the calf muscles when the extended leg is flexed at the hip. Synonym: leg phenomenon, Pool-Schlesinger sign, Schlesinger's sign. In tetany, contraction of the arm muscles following the stretching of the brachial plexus by elevation of the arm above the head with the forearm extended, resembles the contraction resulting from stimulation of the ulnar nerve. Synonym: arm phenomenon. (05 Mar 2000) |
| Schultze's sign | <clinical sign> In latent tetany, tapping the tongue causes its depression with a concave dorsum. Synonym: tongue phenomenon. (05 Mar 2000) |
| scimitar sign | <clinical sign> A curvilinear structure seen roentgenographically in the lung and associated with anomalous pulmonary venous drainage, suggesting the sickle shape, of a Turkish saber; also used to refer to the scalloped shape of the sacrum in spinal dysraphism with anterior meningocele. (05 Mar 2000) |