Biomedical subjects
Publications and source records attributed to M Campi.
The Authors report two cases of cysto-hepatic ducts. Clinical and therapeutic patterns of this rare biliary disease are stressed, underlining the surgical hazard related to iatrogenic damage of bile ducts during operative manoeuvres.
Stress is laid on certain principles of diagnostic research in the event of extra-suprarenal pheochromocytomas. The importance of CT is recalled, specifying the usefulness of complementary examinations such as selective venous catheterism and above all of scintigraphy with 131I MIBG.
The action potential digitalized and stored by means of a fast solid state electronic waveform recording system (Digitalizer) can be directly read out on a printer or in a computer for further processing. It has been designed a digital interface allowing the automatization of these bioelectrical data acquisition and printing process.
The equation for membrane potential (V) of the squid giant axon or some muscle cells, which is the heart of the Hodgkin-Huxley model for the action potential, can be written in three ways: first, as a partial differential equation in time and space; second, as an ordinary differential equation in time, assuming uniform wave propagation for the action potential, and third, as an even simpler ordinary differential equation for the potential at a point, so-called "space clamp" conditions. Solutions were computed for the first two of these equations, at three different temperatures, and the results compared. Temperature dependence of the appropriate parameters was calculated from a simple exponential relationship. Significant changes in the quantitative predictions of the model were found as the temperature was changed from 6.3 C to 18.5 C. Phase-plane (V v V, I v V) analysis has been used to examine the nature of these differences.
A case of solitary rectal ulcer is presented. Different views on the pathogenesis are discussed. Symptoms were nonspecific: anal pain, rectal tenesmus and bleeding. On sigmoidoscopy, the lesion has a characteristic appearance, but the definitive diagnosis of benignity must depend upon the recognition of specific histopathologic features in rectal biopsy specimens from ulcer margins. In this case, the surgical treatment was satisfactory, but frequently neither medical nor surgical treatment achieve relief of symptoms or healing of the lesion.