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Query: UMLS:C0027497 (nausea)
 23,468 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The aim of the randomized multicentre double-blind study was to establish whether nonionic contrast media differ in tolerability. The controlled comparison was conducted at 4 centres on a total of 798 patients with indication for i.v. DSA and computed tomography. The nonionic contrast media Iopamidol and Iopromide with an iodine content of 300 mg/ml each were studied. The osmolality of both contrast media is virtually identical. Both groups of patients were largely homogeneous in terms of demographic data and case history. The history of allergies was positive in 32.4% of the Iopamidol group and in 32.3% of the Iopromide group. The arithmetic mean of the doses administered to each patients was 148.3 and 149.3 ml, respectively. At all 4 centres there was a higher incidence of adverse events with Iopromide than with Iopamidol. The main differences with regard to pseudo-allergic reactions was the incidence of urticarial reactions, pruritus, nausea, vomiting and coughing. 89 of the 399 patients (22.3%) receiving Iopamidol and 120 of the 399 patients (30.1%) receiving Iopromide experienced pseudo-allergic reactions. The difference between both contrast media is statistically significant (p less than 0.05). There is a 95% certainty that less pseudo-allergic reactions will occur after an Iopamidol injection than after Iopromide. Possible explanations for the differences in tolerability between the two nonionic contrast media with identical osmolality are discussed.
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PMID:[Tolerability of nonionic contrast media--results of a multicenter double blind study]. 161 Sep 29

Low osmolar contrast media (CM) cause less hemodynamic and electrical changes than conventional CM, and many cardiologist have switched to the newer agents. Recently, concerns about a possible increased frequency of thromboembolic complications with low osmolar CM have been raised. This study compared two low osmolar heparinized CM, one ionic (Hexabrix) and the other nonionic (Isovue), in 500 consecutive patients undergoing either diagnostic catheterization (417) or coronary angioplasty (83). Adverse effects were uncommon (37 patients), but were more frequent with Hexabrix (12%) than Isovue (3%); p less than 0.05. The most common adverse effects were nausea or vomiting. Death, related to abrupt occlusion of a severe left main stenosis occurred in one patient who received Hexabrix, and acute pulmonary edema occurred in one patient who received Isovue. No apparent thromboembolic complication occurred. In conclusion, both low osmolar CM were well tolerated, but Hexabrix caused more transient nausea or vomiting. Both CM were safe and the incidence of thromboembolic complications when prospectively looked for was very low.
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PMID:A comparison of heparinized low osmolality ionic and nonionic contrast media in 500 patients undergoing cardiac angiography. 227 36

Forty consecutive patients with coronary artery disease undergoing left ventricular angiography took part in a randomised double blind trial comparing a conventional contrast medium sodium meglumine iothalamate (Cardio-Conray) with the low osmolar agent iopamidol. Iopamidol produced a smaller rise in heart rate and a smaller fall in left ventricular systolic pressure, but the changes in left ventricular and diastolic pressure and maximum rate of change of pressure (dP/dt max) were not different. The numbers of extrasystoles per minute for five minutes after ventriculography were similar in both groups except for the first 15 seconds, when the number of extrasystoles was increased in the iopamidol group. The frequency and magnitude of symptoms (heat, angina, headache, nausea) were significantly different in two groups. Iopamidol caused less haemodynamic disturbance than Cardio-Conray, although the improvement is small and offers no advantage in reducing symptoms or extrasystoles.
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PMID:Contrast media for left ventricular angiography. A comparison between Cardio-Conray and iopamidol. 620 Jan 29

Iopamidol is a new, nonionic, water-soluble contrast material currently undergoing clinical trials for intravascular and intrathecal use in Europe and the United States. In this study, 12 patients underwent lumbar myelography with this agent. For each subject, up to 12 mL of iopamidol (at 200 mg I/mL) was employed. The myelograms obtained were highly satisfactory. No serious adverse reactions were observed. The most common side effect--headache--occurred in seven patients. However, six of the seven headaches were mild and transient, and did not require treatment. Nausea occurred in two patients, back pain in two patients, hypotension and hypertension each in one patient. All of these reactions were mild and self-limited. Iopamidol appears to be a safe and conveniently used agent for lumbar myelography.
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PMID:Iopamidol in lumbar myelography. 622 4

A double-blind study was performed to compare metrizamide with the new iodinated water-soluble nonionic contrast medium, iopamidol, for conventional and computerized tomography lumbosacral myelography. Both contrast agents were used in 30 patients, and were equivalent in terms of image quality and clinical accuracy. Headaches and nausea were less severe using iopamidol. The most striking difference was found in adverse neurobehavioral reactions and associated electroencephalographic abnormalities, which were noted in 17% of the metrizamide group but were not seen with the use of iopamidol. Iopamidol appears to be superior to metrizamide for intrathecal applications. An explanation of the differential neurotoxicity is provided.
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PMID:A double-blind clinical trial of iopamidol versus metrizamide for lumbosacral myelography. 633 67

A randomized double-blind study was conducted to compare the radiographic quality and adverse reactions in myelography of the two nonionic water-soluble contrast media, iopamidol and metrizamide. A total of 46 myelograms were obtained, 28 with iopamidol and 18 with metrizamide. Untoward reactions consisted of nausea, headaches, back and leg pain, neuropsychiatric findings, and urinary retention. Iopamidol caused no reactions in 20 of the 28 cases, while metrizamide caused no reactions in only three of 18 cases. Film quality evaluation showed 22 of the 28 studies with iopamidol were judged excellent, whereas only 11 of the 18 metrizamide studies were judged excellent. The results of this study suggest that iopamidol produces better quality studies with fewer and milder adverse reactions than metrizamide.
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PMID:Comparison of radiographic quality and adverse reactions in myelography with iopamidol and metrizamide. 641 Jul 30

Because of the frequency and seriousness of side effects observed after radiculography, due to, among the other things, the amount of contrast medium, the authors describe a method that gives diagnostically satisfactory results using a low dose of contrast and a tangent-beam technique. Among 106 patients undergoing radiculography with a tangent-beam technique and Iopamidol, only 4 developed mild side effects, namely headache in three cases and headache with nausea in one.
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PMID:Radiculography with reduced amounts of contrast medium. 651 21

Iopamidol, a new non-ionic contrast medium with low osmolality, was compared with Isopaque Coronar during selective coronary angiography in 16 patients. Iopamidol caused significantly less bradycardia, less ECG changes and less fall in blood pressure than Isopaque Coronar. No subjective adverse effects such as chest pain, vomiting, nausea or sensation of heat occurred. The results indicate that Iopamidol has advantages as a contrast medium for coronary angiography.
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PMID:Coronary angiography with Iopamidol. 676 55

A review of immediate and delayed side effects noted in a consecutive series of 1,138 myelograms made with Iopamidol in the Services of Neuroradiology of various hospitals and university clinics at Pavia, Perugia, Vicenza, and Parma (all in Italy). The contrast was administered by lumbar spinal route at iodine concentrations of 200, 300 and 370 mg/ml, in amounts varying from 5 to 20 ml depending on segments being examined and extant clinical indications. The incidence and characteristics of complications (headache, nausea, vomiting, evidence of radicular irritation, etc.) were assessed in relation to examination technics, segments of spine being explored, iodine concentrations, and amounts of contrast injected.
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PMID:Myelography with iopamidol, a nonionic water-soluble contrast medium: incidence of complications. 717 75

Side-effects like pain or nausea are caused by contrast media of high osmolality. Therefore new compounds of low osmolality (1/3 of old Compounds) have been formulated. Clinical introduction has revealed better tolerance and very low rates of side-effects. Angiographies with Ioxaglate, Iopamidol or Metrizamide have become almost painless Procedures.
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PMID:Formulation and clinical introduction of low osmolality contrast media. 726 25


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