Quantitative sensory testing in dogs with spontaneous osteoarthritis

Area of Science:

• Veterinary Medicine
• Pain Research
• Animal Physiology

Background:

• Osteoarthritis (OA) is a common degenerative joint disease in dogs, often associated with chronic pain.
• Understanding changes in somatosensory sensitivity is crucial for assessing pain and developing effective treatments.
• Previous research has explored sensory changes in OA, but findings require further investigation in spontaneous canine models.

Purpose of the Study:

• To investigate alterations in somatosensory sensitivity in dogs experiencing spontaneous osteoarthritis (OA) and pain in the stifle or hip joints.
• To compare these sensory changes to those observed in healthy control dogs.

Main Methods:

• A prospective study involving 30 control dogs and 51 dogs with OA-related pain (some receiving NSAIDs).
• Quantitative sensory testing (QST) using various noxious and non-noxious stimuli applied to distal and primary sites.
• Dogs were tested twice, one month apart, with data analyzed using multilevel modeling.

Main Results:

• Osteoarthritis category was not a significant determinant for most QST outcome measures.
• Novel non-nociceptive tests indicated non-noxious hypoesthesia (reduced sensitivity) associated with OA pain.
• Feasibility of performing QST assessments was lower than in prior studies.

Conclusions:

• Variability in QST feasibility in a clinical setting may confound OA-related sensory changes.
• The findings suggest potential alterations in non-pain processing in dogs with OA pain, warranting further clinical investigation.