Biomedical subjects

P C Rajaram

Publications and source records attributed to P C Rajaram.

9 recordsLinked to original sources

PubMed1983

Type D double aortic arch. Double aortic arch with interruption of its left component proximal to the site of origin of left common carotid artery.

Type D double aortic arch in a five year old boy (with interruption of left arch proximal to left common carotid artery)--with persistent ductus arteriosus and stenosis of right and left pulmonary arteries diagnosed during life is reported. At surgery for P.D.A., the anatomy was confirmed. There was no vascular ring. Types A, B and C double aortic arches with interruption of left arch respectively distal to P.D.A., proximal to P.D.A. and proximal to left subclavian artery have already been reported. Ours happens to be the first case of type D double aortic arch diagnosed ante-mortem and confirmed at surgery.

Aorta, Thoracic↗

PubMed1979

Plain roentgenographic estimation of systolic pulmonary artery pressure by the pulmonary arterial angle method.

Chest roentgenograms of 125 patients (115 with pure or predominant mitral stenosis) were studied by the pulmonary arterial angle method to estimate systolic pulmonary artery pressure without prior knowledge of catheterization data. First the angle between the line drawn along the right upper lobe artery and the tangent drawn along the point of junction of superior and lateral borders of the right pulmonary artery was determined. Next the angle between the right middle lobe artery and the descending pulmonary artery is determined. The difference between these angles equals systolic pulmonary artery pressure. Catheter and angle values were identical in 26 patients. There was a 1- to 5-mm difference in 70, a 6- to 10-mm difference in 18, an 11- to 15-mm difference in 8, and a difference greater than 15 mm in 3.

Blood Pressure↗

PubMed1979

Plain roentgenographic estimation of pulmonary vascular pressures: an improved technique: a catheter-correlated study of 215 patients with mitral valvular disease.

Our improvement on Turner's technique enabled more accurate plain x-ray estimation of pulmonary venous pressure (PVP) up to 60 mm and of systolic pulmonary arterial pressure (PAP) up to 150 mm in 215 patients catheterized for mitral valvular disease. Our improvement comprises (1) five main pulmonary artery (MPA) grades 0 to IV according to its area and volume; (2) modified pressure values assigned for MPA and kinetic energy of the right ventricle (required to pump blood into the pulmonary arterial bed) according to MPA grades; and (3) nine PVP grades from 0 to 8 with corresponding assigned PVP values. These modifications have enhanced the accuracy of the technique up to 85 to 95%.

Aortic Valve↗

PubMed1978

Lymphatic dynamics of liver by hepatic lymphography using lipiodol ultra fluid.

Hepatic lymphography by intra-parenchymal injection of four to ten millilitres (ml) of lipiodol ultrafluid, our modification of functional hepatography, performed on sixty one patients helped study lymphatic dynamics of liver. In conditions associated with significant hepatic venous outflow obstructions, such as hepatic cirrhosis, inflammatory diseases of liver and primary or secondary malignant lesions of the liver, this study delineated liver lymphatics and portal and para aortic lymph nodes. In one case mediastinal nodes were also delineated by flow of lipiodol from the bare area of the liver via trans-diaphragmatic and pleural lymphatic. The lymphangio-architecture of the opacified nodes depicted the nature of pathology inflicting them and the liver. Lipiodol in the lymphatic system, staying longer than the freely diffusible aqueous contrast, provided more detail and better information.

Hodgkin Disease↗

PubMed1974