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Biomedical subjects

L Pittorino

Publications and source records attributed to L Pittorino.

7 recordsLinked to original sources
PubMed1985

Instrumental evaluation of the venous circulation in the arteriopathic subjects.

In peripheric arteriopathies, alterations occur to the venous system with a particular swelling of the veins of the foot-top, in the subjects (sclerotic or diabetic) at the 2nd and 3rd Fontaine stage, which gradually decreases until the collapse in the most advanced levels of the arterious affection (4th stage). In order to verify all that, we examined 40 artheriopathic subjects at the different Fontaine stages through a c.w. doppler apparatus and an impedence plethysmograph. Together with the modification of the arterious doppler velocitogram and the reduction of the Winsor index, we noticed that the velocity of the venous flow increases together with a venous hypertension that reaching the highest values at the 3rd stage, while at the 4th stage they are reduced because of the progress of the sclerosis. The impedence plethysmogram shows a reduction of the systodiastolic sphygmic excursion with a variation of the basic line, depending on the respiration, proportional at the clinic stage. In diabetic subjects the progress of the disease is more precocious because of the quicker implication of the microcirculation.

Aged↗
PubMed1982

[On some experimental conditions possibly influencing the correct measurement of venous pressure by Doppler method].

Measurement of venous pressure by means of the Doppler method applied to the posterior tibial vein and to the internal and external saphenous veins is subject to error which depends on the observer's technique. We have therefore sought to ascertain whether and how differences in measurement techniques could affect the results of venous pressure determination in 50 subjects. We have observed that: --Measured pressure are higher when the duration of the test is prolonged, probably because the cuff remains inflated too long. --Of several consecutive determinations, the first and second yield generally higher values, that decrease and remain stable thereafter through the 5th measurement, following the initial loss of venous tone. --Venous pressure is lower as the measurement site is moved more proximally, as predicted by the expected pressure gradient along the venous circulation; the decrease could also be affected by local changes of vein compliance.

Adult↗
PubMedDate not supplied

[Measuring venous pressure with the Doppler technic statistical data].

With reference to the measuring method suggested, we report the pressure indices noted in surgery, in order to compare them with those of non-surgical methods, using the Doppler. We also define some parameters for recording the measurements; failure to observe these might result in inaccuracy of the instrumental findings. We have to consider the index of maximum pressure to be attained using the pneumatic cuff, the lenght of time of compression, and the place at which the measurement is taken.

Female↗
PubMedDate not supplied

[Measuring venous pressure with the Doppler technic: standardization of the method].

Using the Doppler, we have studied the venous pressure, with the patients standing, of 6,172 legs. In a normal subject, the index of average pressure is 59 mmHg in the posterior tibial vein, and 58 mmHg in the long saphenous vein. Where there are varicose veins, the average pressure is 90 and 96 mmHg in the deep veins and in the superficial veins. In the case of post-phlebitic syndrome, the average index is 101 and 102 mmHg in the deep and superficial veins. In this work, the credibility of the method is discussed, and in particular, in comparison with the surgical methods, and its usefulness in current phlebological practice is defined.

Humans↗