Biomedical subjects
Publications and source records attributed to D S Gupta.
One hundred dental models of normal occlusion were evaluated to check the reliability of Pont's Index on a North Indian population. It was concluded by the present study that significant correlations were found to exist between the combined maxillary incisor widths and the maxillary intermolar and interpremolar arch widths.
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A 24-year-old man presented with late stenosis of a cloth-covered Starr-Edwards valve (model 2320). Fibrous ingrowth occurred at the inflow orifice of the valve and all three struts were adherent to the aortic wall, creating a "tunnel" form of obstruction. The stenotic valve was replaced with a porcine heterograft, and the small aortic root was enlarged with a Dacron patch. This form of late prosthetic valve stenosis should have been prevented by enlargement of the aortic root at the time of valve insertion and by long-term anticoagulant therapy.
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Surgery has become an accepted method of treatment for coronary artery disease and its complications. Revascularization results in significant improvement in symptoms for patients with angina pectoris. Occasionally, patients requiring surgery for angina pectoris will sustain reversible ischemic damage during operation; such patients can be successfully weaned from cardiopulmonary bypass with full recovery when intra-aortic balloon counterpulsation is used. Arrhythmias associated with ischemic damage to the myocardium also can be controlled when IABCP is used for physiologic assistance. Patients in cardiogenicshock of pulmonary edema after acute myocardial infarction have an ominous prognosis. When decompensation occurs, IABCP may be used to stabilize the patient and to allow study and corrective surgery if possible. The prognosis is better for patients with ventricular septal defect, although selected patients without a mechanical defect of the myocardium can be salvaged if the response to IABCP is favorable. Counterpulsation has also been shown to be useful in achieving pulsatile cardiopulmonary bypass and in assisting high-risk patients through operation. External pressure circulatory assist (EPCA) is less effective than IABCP in assisting the failing myocardium; however, the external device is noninvasive and may be a useful adjunct in situations where IABCP is not feasible.
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