Temperature changes in rheumatoid hand treated with nitrogen vapors and cold air

Area of Science:

• Therapeutic hypothermia
• Rheumatology
• Medical imaging

Background:

• Local cryotherapy is used for pain management in rheumatoid arthritis.
• Understanding the thermoregulatory effects of different cryotherapy agents is crucial for treatment optimization.

Purpose of the Study:

• To compare the thermovisual effects of local cryotherapy using nitrogen vapors versus cold air on hand surface temperature.
• To assess the immediate and short-term temperature changes in both treated and contralateral hands.

Main Methods:

• Thermovisual assessment of hand surface temperature in 47 rheumatoid arthritis patients.
• Application of topical cryotherapy with nitrogen vapors (-160°C) or cold air (-30°C) to one hand.
• Thermal imaging before and up to 3 hours post-treatment.

Main Results:

• Nitrogen vapors caused a significantly greater immediate drop in skin temperature (17.9°C) compared to cold air (23.1°C) one minute post-application.
• Both treatments resulted in rapid rewarming, with hands returning to baseline temperature within 15 minutes.
• Similar temperature changes were observed in both cooled and non-cooled hands, suggesting a contralateral response.

Conclusions:

• Nitrogen vapor cryotherapy induces a more pronounced immediate cooling effect on the hand surface than cold air.
• Despite initial differences, both cryotherapy methods lead to comparable short-term temperature recovery and contralateral effects.
• Further research may explore the clinical implications of these thermovisual differences in rheumatoid arthritis management.