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Biomedical subjects

R L Mani

Publications and source records attributed to R L Mani.

At least 19 recordsLinked to original sources
PubMed1978

Residual Patopaque in renal cysts: an addition to the differential diagnosis of intra-abdominal heavy-metal densities.

Single or multiple heave-metal densities seen on abdominal radiographs give rise to several diagnostic possibilities. These include pills or foreign bodies in the gastrointestinal tract, barium in colonic diverticula, and bullets or shrapnel. This communication describes two patients in whom heave-metal densities observed on abdominal radiographs were caused by residual Pantopaque from prior renal cyst puncture.

Aged↗
PubMed1978

Pain associated with peripheral angiography: is lidocaine effective?

In a double-blind study, 28 patients for peripheral angiography received contrast injection both with and without lidocaine. In 22 patients not receiving premedication, the addition of lidocaine to the contrast medium resulted in increased pain in 54.5% of patients and no difference in pain in 41% when compared to contrast alone. In patients premedicated with 5--10 mg Valium intravenously, the addition of lidocaine to the contrast medium resulted in increased pain in half the patients and no difference in the others. The physiologic mechanisms are discussed, and the importance of hyperosmolality of contrast agents in pain production is stressed.

Aged↗
PubMed1978

Complications of catheter cerebral arteriography: analysis of 5,000 procedures. I. Criteria and incidence.

Computer analysis of complications of 5,000 catheter cerebral arteriograms performed at four hospitals (two training and two nontraining) revealed a total of 68 complications (1.4%). Eight (0.16%) of these complications were major: five patients required thrombectomy or embolectomy, two had permanent neurologic deficits, and one patient died. The complication rate for the training hospitals (3.9%) was significantly higher than that for the nontraining hospitals (0.9%), but the rates of permanent complications were identical in both groups (0.1%). Reporting criteria and complication types are described.

Adult↗
PubMed1978

Complications of catheter cerebral arteriography: analysis of 5,000 procedures. II. Relation of complication rates to clinical and arteriographic diagnoses.

Clinical (prearteriographic) and arteriographic diagnoses were grouped into six categories each for analysis of central nervous system and systemic complications of 5,000 catheter cerebral arteriograms. Within each category, there was no significant difference in complication rate between clinical and arteriographic diagnoses. The highest complication rates (1.2%-1.9%) were in patients with cerebrovascular occlusive disease, posttraumatic or postoperative conditions, and subarachnoid hemorrhage. Significantly lower complication rates (0.2%-0.5%) were found in patients with tumor, seizure or headache, and patients with normal arteriographic findings.

Adult↗
PubMed1978

Complications of catheter cerebral arteriography: analysis of 5,000 procedures. III. Assessment of arteries injected, contrast medium used, duration of procedure, and age of patient.

Complication rates in 5,000 consecutive catheter cerebral arteriograms were assessed with regard to arteries injected, contrast medium used, patient age, and duration of procedure. No statistically significant difference was found between the complication rate when the carotid artery alone was injected and that when the carotid artery was injected in combination with the vertebral artery, the aortic arch, or both. There was also no significant difference between the total complication rates using Conray-60 and Renografin-60. However, although Conray-60 demonstrated no change in complication rate with increased volume, Renografin-60 showed a consistent and significant increase in complication rate with increased volume. Complication rates were also significantly higher when the procedure lasted more than 80 min and in patients more than 40 years old. As might be expected, nontraining hospitals used significantly less contrast material and had significantly shorter procedures than training hospitals.

Adult↗
PubMed1978

Radiographic diagnosis of meningioma of the lateral ventricle. Review of 22 cases.

Review of 22 cases of meningioma indicates that this lesion occurs slightly more frequently on the left but without predilection for sex or age of the patient. The presenting symptoms were nonspecific. Plain radiographs of the skull sometimes demonstrated calcification in the tumor, but more often did not. Cerebral angiography frequently showed enlargement and displacement of the anterior choroidal artery on the side of the tumor; the lateral posterior choroidal artery on the side of the tumor was also enlarged and displaced in seven of nine patients who underwent vertebral arteriography. Pneumoencephalography accurately demonstrated the site and size of the lesion, as did radionuclide scanning if the lesion was vascular. Computerized tomographic (TC) scanning also determined the location and size of the tumors, as well as their mass effect and vascularity; CT scanning also demonstrated calcification that was not visible on the plain skull radiographs in two of six patients who underwent CT scanning and had calcification.

Adolescent↗
PubMed1977

Pressure dressings and postangiographic care of the femoral puncture site.

Consecutive patient records (900) were reviewed to determine the incidence of local complications following the use of pressure dressings for femoral puncture. The authors found an overall complication rate (0.44%) which was less than that found by others (1%). No statistically significant differences were found in local complication rates between hypertensive (0.56%) and normotensive (0.42%) groups. No advantage was found in the postangiographic application of pressure dressings.

Angiography↗
PubMed1977

Maximum flow rates for microcatheters.

Microcatheters are defined as those with outer diameters of 4 French gauge or less. Authors tested five sizes of catheters from 2 to 4 French, inclusive to determine the bursting and maximum safe flow rates with automatic injectors. This communication describes the maximum flow rates for various sizes and lenghts, as well as the feasibility of employing automatic injectors with microcatheters.

Catheterization↗
PubMed1977

The catheter wall simulating thrombus formation seen on pullout angiograms: an experimental study.

The authors investigated the nature of a radiolucent line that was seen paralleling the radiopaque catheter wall on more than 70% of 176 pullout angiograms. Although this line may indicate a thrombus sleeve, accumulation of thrombus was rarely seen at the puncture site. A series of experiments demonstrated clearly that (a) an identical line could be reproduced in a bloodless model; (b) the width varied directly with the thickness of the catheter wall and appeared irregular in contour with 6.5, 7, and 8 French catheters: and (c) this line represented the outer third of the catheter wall.

Angiography↗
PubMed1977

The six French Catheter in arch aortography.

Local thromboembolic complications of arterial catheterization may be diminished by the use of smaller-sized catheters. Described are (a) the use of a size 6 French catheter with side holes for routine arch aortography; and (b) the lowest bursting points for two such types of commercially available catheters.

Aortography↗
PubMed1977

Normal cerebral arteriography in patients with spontaneous subarachnoid hemorrhage.

Previous studies have reported that 18 to 27% of patients with spontaneous subarachnoid hemorrhage have normal cerebral arteriograms. Our series of 220 patients from three hospitals demonstrated normal arteriograms in only 16 (7%). Recent improvements in neuroradiologic techniques, such as femoral catheterization, magnification angiography, oblique and basal projections, and subtraction most probably contribute to the improved yield. Nonvisualization of a cerebral aneurysm probably represents the most common explanation for a normal cerebral arteriogram.

Cerebral Angiography↗