|Year : 1992 | Volume
| Issue : 3 | Page : 169--172
Digital blood flow in systemic sclerosis
Sanjay Ghosh, A Biswas
Digital vascular status in 10 untreated patients suffering from systemic sclerosis for 1 to 4 years was evaluated by a method called photoplethysmography (PPG). The PPG probe was attached serially to the distal phalanges of all the digits of four limbs with Velcro-strap at an ambient temperature of 28° C - 32° C and humidity of 60-65 percent to record PPG tracings. Six patients (Group A) had clinical symptoms and signs of vascular impairment whereas 4 patients (Group B) did not have. Diminished vascular flow was seen in all the patients of both the groups. On an average, 9 digits (45%) in Group A and 7 digits (35%) in Group B had reduced blood circulation. The difference between the two groups was not statistically significant (p>0.5). Degree of vascular impairment had no bearing upon the duration of the disease (rxy=+0.41). Impairment of digital blood flow may be due to organic narrowing of digital artery, functional vasomotor changes, endothelial proliferation and damage, blood hyperviscocity and less deformable red blood cells.
Source of Support: None, Conflict of Interest: None
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