Infection of a tendon sheath is a critical condition in horses because
of the severe lameness produced, difficulty in eliminating infection
in synovial structures, and the sequelae that may produce long-term la
meness. With tenoscopy and thecal lavage, intrathecal antibiotics, and
systemic antibiotics, however, most infections can be eliminated and
the prognosis for survival is more than 85%. The prognosis for athleti
c performance is approximately 50%. convalescent therapy, including th
e judicious use of intrathecal hyaluronan, passive range of motion exe
rcises, annuligament resection and immobilization, is critical to clin
ical success.