What's the difference between bolus and obolus?

Bolus

Definition:

(n.) A rounded mass of anything, esp. a large pill.

Example Sentences:

(1) We investigated whether these peptides also affect the sleep EEG in humans when given intravenously by comparing polysomnographically the effects of four boluses of (1) placebo, (2) 50 micrograms GHRH or (3) 50 micrograms SRIF administered at 22.00, 23.00, 24.00 and 1.00 h to 7 male controls.
(2) An intravenous bolus of 300 micrograms.kg-1 of 3-desacetylvecuronium was rapidly injected into the jugular vein.
(3) Dose distributions were evaluated under thin sheet lead used as surface bolus for 4- and 10-MV photons and 6- and 9-MeV electrons using a parallel-plate ion chamber and film.
(4) During anaesthesia with 60-70 per cent N2O in O2 and 0.2 per cent isoflurane, a maintenance dose (MD) of fentanyl was administered using a continuous variable-rate IV fentanyl infusion, supplemented by intermittent 50 micrograms IV boluses.
(5) Our dynamic study indicated that: 1) a bolus injection of contrast medium with our method of CTA (CTA-B) produced an attenuation difference between liver and tumor which was about double that obtained with standard methods for CTA, and 2) marked tumor-liver attenuation differences (above 20 HU) persisted for more than 60 s in CTA-B and for not more than 20 s with conventional methods for CTA.
(6) Studies have also been performed in conscious rats given BP either as an intravenous bolus or by gavage.
(7) Approximately 50% of a bolus injection of 125I-ANP was removed during a single pass through the lungs compared with the intravascular marker 14C-dextran.
(8) Vasoconstriction by 2 leads to significantly (p less than 0.01) lower blood levels of 1 in contrast to bolus injection of 1 without 2 under identical dosage regimens.
(9) In urethane-anesthetized rabbits, IOP and blood pressure were lowered by intravenous administration of delta 9-THC but not by bolus cerebral administration.
(10) bolus injection of 400 microCi MAb E48 IgG (number of mice (n = 6, number of tumours (t) = 9) or 800 microCi MAb E48 IgG (n) = 5,t = 7), whereas control groups received either diluent (n = 3,t = 5), unlabelled MAb E48 IgG (n = 4,t = 5) or 800 microCi 131I-labelled isotype-matched control MAb (n = 6,t = 9).
(11) To evaluate the clearance and circulation of ATP and its metabolites after intravenous injection, 20 rabbits received ATP-MgCl2 as a bolus injection or a continuous intravenous infusion.
(12) The effect of intraduodenal acidification or intravenous bolus injections of secretin on plasma insulin concentrations during infusions of glucose was also examined.
(13) Colitis was induced in the distal colon by rectal infusion of formaldehyde solution, followed by an intravenous bolus of soluble immune complexes.
(14) Nine patients were admitted to the hospital, placed on a diet containing 150 mEq sodium, and studied for periods of 4 hours, on different days, in the following conditions: (1) supine position, (2) upright posture (UP), (3) UP after 10 mg domperidone, intravenously in bolus, and (4) UP after 3 days of domperidone, 30 mg orally.
(15) One is the ureteral peristaltic contraction which plays a principal role in urinary bolus transport at low flows; the other is ureteral wall tonus, which plays an important role in the transport of columns of urine by the ureter, which does not coapt its walls, at the higher flow rates.
(16) Epidurally administered clonidine represents a new approach to postcesarean section pain therapy, yet the appropriate bolus dose and infusion to provide effective pain relief have not been defined.
(17) with half given as an intravenous bolus and the remainder administered subcutaneously.
(18) Pituitary gonadotropin reserve and responsiveness were studied by giving an intravenous bolus of synthetic LH-releasing hormone (LH-RH) and measuring the circulating gonadotropin levels before and after the injection.
(19) It is possible that in a similar future case, discontinuance of dextran infusion and administration of a single bolus of 12 bags of cryoprecipitate may be adequate treatment.
(20) Experimentally induced tongue contact with a variety of solid surfaces during lapping (an activity involving accumulation of a liquid bolus in the valleculae) induced neither increased jaw opening nor the additional EMG pattern.