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PubMed1998

Similar cytogenetic effects of sodium-meglumine diatrizoate and sodium-meglumine ioxithalamate in lymphocytes of patients undergoing brain CT scan.

Cytogenetic effects of two ionic contrast media (CM), Urografin 76% a sodium-meglumine diatrizoate, and Telebrix 38, a sodium-meglumine ioxythalamate, were tested on lymphocytes of patients undergoing brain CT Scan. Both compounds have approximately similar iodine concentrations. Chromosomal aberrations were scored in peripheral lymphocytes obtained from 15 patients undergoing brain CT with either urografin 76% or telebrix 38 before and after examination. Results showed no difference in aberration frequency for patients who underwent brain CT without contrast materials compared to controls. However, injection of CM resulted in a high frequency of chromosomal aberrations which significantly differed from controls (P < 0.05). The effect of urografin 76% appeared to be similar to telebrix 38. Therefore, both CM exhibited clastogenic effects on peripheral lymphocytes in vivo. An increase in chromosomal aberrations due to CM used in this study were similar to that reported for other ionic and non-ionic compounds.

Adolescent↗
PubMed1988

Iopamidol as contrast medium in endoscopic retrograde pancreatography: a prospective randomised comparison with diatrizoate.

In a prospective double-blind comparison of contrast media for retrograde pancreatography, 85 consecutive patients undergoing endoscopic retrograde cholangio-pancreatography (ERCP) were randomised to receive either the non-ionic medium, iopamidol (Niopam) or the ionic medium, meglumine diatrizoate (Urografin). The quality of pancreatograms obtained was assessed "blindly" using a specially devised scoring system, and patients were observed for clinical and biochemical evidence of acute pancreatitis following ERCP. Pancreatogram scores were similar in the "Niopam" and "Urografin" groups. No patients developed clinical evidence of acute pancreatitis. Eighteen hours after ERCP median increments in serum amylase and lipase in the "Niopam" group were significantly lower and hyperamylasemia and hyperlipasemia significantly less frequent than in the "Urografin" group. Niopam may be a safer contrast medium than Urografin for retrograde pancreatography, particularly in patients in whom the risk of acute pancreatitis is high. However, in view of its relatively high cost, further direct clinical evidence of reduced toxicity is required before Niopam can be recommended for routine use at ERCP.

Cholangiopancreatography, Endoscopic Retrograde↗
PubMed1982

[The effect of diatrizoate (Angiografin) on the aortic endothelium of the rat in shock].

Investigations have been carried out on the endothelial damage produced by diatrizoate (Angiografin) during the course of endotoxin shock. A single injection was given directly into the aorta of 1 ml of the contrast medium, with an iodine content of 300 mg/ml. The increased proliferation of the aortic endothelium could be shown to be due to the endotoxin shock, but was not further increased by administration of the contrast medium.

Animals↗
PubMed2001

Preoperative bowel preparation with meglumine and sodium diatrizoate (Gastrografin): a prospective randomised comparison.

OBJECTIVE: To test the use of meglumine and sodium diatrizoate (Gastrografin) as an agent for preoperative mechanical bowel preparation. DESIGN: Prospective randomised comparison. SETTING: County general hospital, Greece. SUBJECTS: 58 patients listed for elective colorectal operations were randomly divided into 2 groups. The first (n = 30) was given Gastrografin 200 ml orally for 2 consecutive days before operation, and the second (n = 28) was given Ringer's solution through a nasogastric tube. MAIN OUTCOME MEASURES: Tolerability, acceptability, quality of cleansing, and complications. RESULTS: There were no disturbances in electrolyte concentrations, and other laboratory variables also remained unchanged. Two patients treated with Ringer's solution had appreciable increases in arterial blood pressure, but there were no significant overall changes. About half the patients given Ringer's felt nauseated and a third vomited. Such symptoms were uncommon in patients treated with Gastrografin (p < 0.01). 28/30 and 26/28 (93%) had a clean colonic lumen at operation, whereas in the reminder the lumen was evaluated as containing "slight residue". There were no operation-related complications. CONCLUSIONS: Gastrografin can be used successfully as an agent for mechanical bowel preparation before elective colorectal surgery, as it gives equally good cleansing results compared with the established method of whole gut irrigation. It also seems to be better tolerated and accepted by patients.

Aged↗
PubMedDate not supplied

The effect of intravenous sodium diatrizoate on the function of the transplanted canine kidney.

The response of the canine renal autograft and allograft was measured following intravenous injection of 1 cc/kg 50% sodium diatrizoate (50% Hypaque). There was no significant effect on glomerular filtration rate or renal plasma flow immediately after injection; likewise there was no significant change in GFR 24 hours following injection compared to control animals.

Animals↗
PubMedDate not supplied

Liver toxicity of ionic (Diatrizoate) and nonionic (C-29) contrast materials: effects of serum enzymes after hepatic artery injection in the rat.

Catheters were placed in the retrograde direction in the surgically exposed gastroduodenal arteries of rats. There was an early postoperative mortality of one-third of the animals. The catheter was exteriorized at the tail and was used for arterial perfusion of the liver with one experimental, nonionic contrast medium (C-29) and one ionic contrast medium (diatrizoate). Both contrast media (370 mg I/ml) were injected in a dose of 4 ml/kg rat. The contrast medium injections caused no significant changes in serum levels of the enzymes ALAT, ASAT, or GT.

Angiography↗
PubMed1987

Mechanisms of action of contrast media on cranial vessels. Comparison of diatrizoate, ioxaglate, iohexol, mannitol, and NaCl on rabbit basilar and ear arteries.

The relaxant effects of the ionic contrast media diatrizoate and ioxaglate and the nonionic agent iohexol on the vascular wall were examined by a sensitive in vitro system. Control solutions of NaCl and mannitol were used to evaluate the relative importance of osmolality to the vasodilation response. The rabbit central ear artery and the basilar artery were precontracted by (1) potassium, causing depolarization of the sarcolemmal membrane, (2) noradrenaline, causing activation of alpha 1-adrenoceptors, and (3) histamine, causing activation of histamine H1 receptors. The contrast media caused concentration-dependent relaxation of both types of arteries; this effect was relatively insensitive to the agent used to precontract the vessels. Histamine-contracted arteries were thought more sensitive to the relaxant agents used than arteries contracted by potassium or noradrenaline. The relaxation induced by the contrast media correlates with the relaxation induced by equiosmolar amounts of NaCl or mannitol. Our results suggest that the artery dilator response seen after exposure to currently used contrast media is due primarily to changes in local osmolality rather than to a specific receptor involvement.

Animals↗
PubMed1988

Vasodilatation and vasoconstriction in the rabbit isolated aorta. Effects of ioxilan, iohexol, and diatrizoate.

The vasomotor effects of contrast media (CM), ioxilan, iohexol, and diatrizoate, and their isoosmotic sucrose solutions as controls, were studied in vitro in rings of thoracic aortas of rabbits. When the osmotic pressure of CM or controls reached the region of 380 mOsm/kg, vasoconstriction developed, reaching a maximum in about 1 hour; it was reversible. It could not be blocked by phentolamine, and therefore did not involve alpha-adrenoceptors. When added to aortic rings precontracted with noradrenaline, all of the CM produced vasodilatation, while reactions to sucrose varied. When endothelium was removed, CM still produced vasodilatation, suggesting a direct chemotoxic effect on smooth muscle. The dilatation effect does not involve the muscarinic receptors, beta-adrenoceptors, or stimulation of prostacyclin synthesis, since the vasodilator response was not blocked by atropine, propranolol, or indomethacin. Blockage of calcium channels did not appear to be a contributing factor. Since the dilator response to all CM was augmented in the presence of the phosphodiesterase inhibitor, iso-butylmethylxanthine (IBMX), it is likely that CM produce vasodilatation chemotoxically by activating the production of a cyclic nucleotide.

Animals↗
PubMed2000

Effects of timing of diatrizoate (water-soluble contrast medium) administration on pancreatic microcirculatory derangement in cerulein pancreatitis in rats.

OBJECTIVE: We investigated whether the timing of administration of contrast medium after onset of acute pancreatitis is critical in determining the magnitude of microcirculatory derangement. METHODS: An acute pancreatitis model in male Sprague-Dawley rats (225-275 g) was established by continuous infusion of cerulein (15 mg/kg per hour). The mean arterial pressure was monitored continuously by means of a femoral artery catheter. Diatrizoate (Hypaque-76), a water-soluble contrast medium, was delivered through a femoral vein catheter at doses corresponding to those given to humans, either 1, 2, or 3 hours after pancreatitis induction. In vivo microscopy and laser-Doppler flowmetry were used to investigate microcirculatory derangement. The water contents of the pancreas and lung, the malondialdehyde levels of the pancreas, and the trypsinogen activation peptide levels in the serum were measured at the end of the experiment (8 hours after infusion of cerulein). RESULTS: Early administration of contrast medium (1 hour after pancreatitis induction) resulted in significantly greater changes in microcirculation and mean arterial pressure than did late administration (2 or 3 hours after pancreatitis induction). Rats given contrast medium 1 hour after induction also had highest pancreas and lung water contents, the highest pancreas malondialdehyde levels, and the highest serum trypsinogen activation peptide levels. CONCLUSION: These results show that a water soluble contrast medium that is often used for computed tomographic imaging of the pancreas can adversely affect the pancreatic microcirculatory parameters, such as tissue perfusion and leukocyte sticking, and hemodynamics in a cerulein-induced model of acute pancreatitis. Early administration seems to cause more severe derangement of the pancreatic microcirculation.

Acute Disease↗
PubMed1971

Effect of aspirin on renal clearance of 125I-diatrizoate.

Glomerular filtration rate was measured from the plasma disappearance curve after a single injection of sodium (125)I-diatrizoate. A therapeutic dose of aspirin in 13 subjects produced a mean fall in glomerular filtration rate of 10.5%.

Aspirin↗
PubMed1977

Diatrizoate absorption from enemas in newborn puppies.

Serum iodine levels increased slightly 15 min. after Gastrografin enemas were given to 20 healthy neonatal puppies. The systemic dehydration which occurs in the neonate following an hypertonic enema primarily reflects an osmotic drawing of water into the bowel, although systemic absorption of diatrizoate through the intact gut wall enhances the alteration in serum osmolarity.

Animals↗
PubMed1983

Iopamidol and meglumine diatrizoate: comparison of effects on patient discomfort during aortofemoral arteriography.

Iopamidol was compared with Renografin-60 (meglumine diatrizoate, Squibb) in a controlled, randomized double-blind study of 40 patients undergoing peripheral arteriography for arteriosclerotic occlusive disease to determine which agent caused less discomfort. Each patient was evaluated for objective signs of discomfort and subjective feelings of pain and heat. Monitoring was achieved by multiple physical examinations, chemical tests, electrocardiograms, and intra-arterial pressure recordings. It is concluded that iopamidol is safe and causes significantly less patient discomfort than Renografin-60.

Angiography↗
PubMed1976

Coronary angiography with diatrizoate and metrizamide. Comparison of ionic and non-ionic contrast medium effect on coronary blood flow in dogs.

The non-ionic contrast medium metrizamide produced a smaller coronary flow increase than the ionic medium diatrizoate after injection into the main left coronary artery in dogs and had also a shorter transit time through the coronary vessels. The coronary veins were better filled with metrizamide. The reduced coronary flow effects of metrizamide compared to ionic contrast medium and the improved venous filling makes metrizamide a favorable contrast material for use in coronary angiography.

Animals↗
PubMed1982

Changes in the rheologic properties of blood as induced by sodium/meglumine ioxaglate compared with sodium/meglumine diatrizoate and metrizamide.

The influence of the new angiographic contrast medium sodium/meglumine ioxaglate on the rheologic properties of blood in vitro was assessed by measurements of blood viscosity and by observation of red cell shape and aggregation. Compared with iodine-similar concentrations of sodium/meglumine diatrizoate and metrizamide, exposition of blood to the new compound was associated with a lower impairment of blood viscosity, rouleaux formation of red cells and with only minor alterations of red cell shape. These favourable results are due to the low hyperosmolality and to absence of direct influence on the red cell membrane of sodium/meglumine ioxaglate.

Adult↗
PubMed1982

Alterations in heart rate and rhythm at urography with sodium diatrizoate.

One hundred and thirty-five consecutive patients referred for urography were monitored electrocardiographically before, during and after injection of 60 ml Hypaque 45% (sodium diatrizoate 45% w/v) over 60 seconds. The injection produced a significant increase in heart rate, while venepuncture alone had no such effect. Twenty-nine (21%) patients developed minor arrhythmias and 6 (4.4%) major arrhythmias following the injection. Major arrhythmias occurred in the older age groups and were more frequent in males. An abnormal baseline rhythm strip had significant predictive value in determining the development of further arrhythmias.

Age Factors↗
PubMedDate not supplied

Pulmonary edema following high intravenous doses of diatrizoate in the rat. Effects of corticosteroid pretreatment.

Serious adverse reactions to intravenous contrast media are rare but of major concern. Corticosteroids are the most commonly used drugs for prophylaxis but there is little documentation of their effectiveness. Controversy also exists about the optimum regime for these drugs. A rat model was used to evaluate the effect of methylprednisolone pretreatment for contrast media-induced pulmonary edema. Rats were given 40 mg methylprednisolone/kg intravenously at various time intervals before the intravenous injection of a high dose of diatrizoate (6 g I/kg). The combination of one dose of methylprednisolone at 24 hours plus another dose at 0.5 hours was the only regimen that caused a significant reduction in the degree of pulmonary edema induced by contrast media. This result provides support for the clinical regimen utilizing iterated doses of corticosteroids over a prolonged period of time.

Animals↗