Felis ISSN 2398-2950

Parotid duct transposition (PDT)

Contributor(s): Miss Heidi J Featherstone, Rhea Morgan

Introduction

  • Surgical technique to move the papilla and parotid duct from the mouth to the inferior conjunctival cul de sac of the eye for the purpose of providing lubrication to the eye in cases of refractory keratoconjunctivitis sicca (KCS) Eye: keratoconjunctivitis sicca.
  • Uncommon in cats.

Uses

  • Cases of KCS unresponsive to medical therapy.
  • Animals with KCS that are not comfortable on medical therapy alone.
  • Most often required in cats that have had the gland of the third eyelid removed.

Advantages

  • Provides a copious amount of watery saliva to lubricate the eye.
  • May prevent blindness in some animals.
  • Improves the comfort level of those animals that have persistent blepharospasm on medical therapy.

Disadvantages

  • Saliva is not the same composition as aqueous tears, so lubrication of the eye is sometimes complicated by mineral deposition on the cornea and eyelids.
  • The animal must be stimulated to salivate frequently.
  • The quantity of saliva produced with each stimulus cannot be controlled and may be excessive.

Requirements

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Preparation

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Procedure

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Aftercare

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to purchase a 30 day trial, or Login

Prognosis

  • With careful surgical technique, the prognosis for successful outcome of the surgery is good.
  • Most eyes tolerate the saliva well, with a decrease in pigmentation and vascularization of the cornea over time. Clearing of the cornea may be enhanced by the use of topical antibiotic/steroid preparations for a while, once the sutures have dissolved from the inferior cul de sac.

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Termote S (2003) Parotid salivary duct mucocoele and sialolithiasis following parotid duct transposition. J Small Anim Pract 44 (1), 21-23 PubMed.
  • Stanley R G (1997) Failure of parotid duct transposition due to sialolith formation. Vet Compar Ophthalmol (2), 126-127 VetMedResource.

Other sources of information

  • Bistner S I, Aguirre G & Batik G (1977) Atlas of Veterinary Ophthalmic Surgery. WB Saunders, Philadelphia, pp 132-137.
  • Slatter D (2001) Fundamentals of Veterinary Ophthalmology. 3rd Ed. WB Saunders, Philadelphia, pp 255-257.
  • Petersen-Jones S & Crispin S (2002) BSAVA Manual of Small Animal Ophthalmology. 2nd edn. British Small Animal Veterinary Association. ISBN 0 905214 54 4


ADDED