Prognosis of functional capacity in rheumatoid arthritis by chirophotogrammetry.
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Biomedical subjects
Publications and source records attributed to A Pauri.
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The authors suggest a suitable method for "measuring" morpho-functional involvement of hands (and wrists). This method analyzes four tests: three postural tests and a photogrammetric test. The three positions are: - "Praying hands" (fig. 1) - "Dorsum of the hands opposed" (fig. 2) - "Phalanges opposed (by their dorsum)" (fig. 3) These positions (1-2-3) define three angles alpha 1, alpha 2, alpha 3. The corresponding indices I1, I2, I3 are synthetized by the following mathematical formula: Ii = 1 - alpha i/90 Patients, in the photogrammetric (or surface) test, lean their hands on a Chigot's plantiscope. The illuminated area provides the fourth index expressed by this formula: I4 = 2,5 Sc/St - 0,25 It is possible to calculate a general index It with the following formula: (formula; see text) Angles and surfaces are documented photographically. The method may be very helpful in evaluating the clinical course and therapy of rheumatoid arthritis.
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The authors suggest a method for "measuring" the morpho-functional damage of hands and wrists. This method analyzes three postural tests: - "Praying hands" (cf. Fig. 1,2) - "Back of the hands opposed" (cf. Fig. 3) - "Phalanges opposed (by their dorsum)" (cf. Fig 4). These tests define for each hand three angles a1, a2, a3. The corresponding indices I1, I2, I3 are obtained by the following formula: Ii = (1 - ai/90 degrees) . 100. One then defines a general index ITOT by the following expression: ITOT = (I1 + I2 + I3)/3 The index ITOT looks very effective in assessing the patient's condition in an objective way and is simple enough to be used in everyday practice. Hence it is also helpful in therapy-monitoring.