Basal cell carcinoma in a dog with chronic solar dermatitis

Comparison of three canine nose guards for reduction of ultraviolet (UVA and UVB) solar radiation

BACKGROUND

Protection from solar ultraviolet (UV) radiation is paramount for some dermatological conditions, yet there are no studies assessing UV nose guards for dogs.

OBJECTIVES

Compare the ability of three nasal guards to block solar UV radiation (UVR) from the canine nose, using two commercial products and one created by the authors.

ANIMALS

Four fabric model dogs were used in this prospective controlled trial.

MATERIALS AND METHODS

Each model had a UV dosimeter applied to the dorsal nose and anterior nasal planum. Three models had nose protectors applied: (1) a mesh hood (OutFox Field Guard, OutFox For Dogs); (2) a fabric nose shield (Nose Protector, Dog Nose Protectors); or (3) a basket muzzle with ultraviolet protection factor (UPF) 50+ fabric developed by the authors. The control had no protective device applied. All the models were placed in direct sunlight and measurements taken over nine 2 h time periods. Total cumulative UVR was analysed for each location and type of guard or control.

RESULTS

All guards provided statistically significant UV protection compared to control at all time points (p < 0.001). The basket muzzle with UPF 50+ guard was consistent in protecting the dorsal and anterior nose, blocking 94.2% and 94.3% UVR, respectively. The fabric nose protector blocked 99.2% UVR from the dorsal and 82.9% anterior. The mesh hood blocked 72.5% of UVR dorsal and 71.4% anterior.

CONCLUSIONS AND CLINICAL RELEVANCE

Two guards were superior in blocking UVR; however, the choice of UV guard in a clinical setting depends on an individual's disease location and tolerance of the device.