Objective—To evaluate the esophageal passage of
capsules in clinically normal cats and determine the
incidence of prolonged transit or entrapment.
Animals—12 clinically normal adult cats.
Procedure—Esophageal transit of barium sulfatefilled
capsules was evaluated fluoroscopically. Each
cat was examined 3 times (36 examinations).
Esophageal transit times were classified as normal
(≤ 30 seconds) or prolonged (> 30 but ≤ 240 seconds).
Capsules were considered entrapped when transit
times were > 240 seconds.
Results—Transit times were normal in 10 of the 36
(27.8%) examinations, whereas times were prolonged
in 7 (19.4%) examinations. Capsules became
entrapped in the midcervical region of the esophagus
during 19 (52.8%) examinations. Following termination
of each examination, cats with entrapped capsules
were fed a small amount (0.5 to 1 ounce) of
food; this resulted in passage of the capsule to the
Conclusions and Clinical Relevance—The possibility
of medication-induced esophagitis should be considered
when orally administering ulcerogenic drugs
to cats. It is recommended that a small volume of
food be given following medications to ensure complete
esophageal clearance. (Am J Vet Res 2000;61:
Objective—To determine the relationship between
parturition date and fetal skeletal mineralization
detected radiographically in cats.
Design—Prospective clinical trial.
Animals—31 queens and their 49 pregnancies.
Procedure—Seventeen pregnant queens were
radiographed with a computed radiography system
every 2 to 3 days from 1 week after pregnancy was
identified by abdominal palpation until parturition.
Radiographs were evaluated to determine the first
identifiable mineralization of 16 bony structures
and teeth during each pregnancy. This information
was used to establish a table of expected parturition
dates on the basis of fetal mineralization.
Single radiographs from an additional 32 pregnant
cats were evaluated, and predictions of parturition
dates were made on the basis of the mineralization
Results—Mineralization was first detected 25 to 29
days prior to parturition (dpp). Mineralization was
determined for the spinal column (22 to 27 dpp), skull
(21 to 27 dpp), ribs (20 to 25 dpp), scapula (17 to 24
dpp), humerus (20 to 24 dpp), femur (19 to 23 dpp),
radius (15 to 22 dpp), tibia (15 to 21 dpp), ulna (5 to 21
dpp), pelvis (8 to 20 dpp), fibula (0 to 17 dpp), tail (8 to
16 dpp), metacarpals and metatarsals (3 to 14 dpp),
phalanges (0 to 11 dpp), calcaneus (0 to 10 dpp), and
teeth (1 to 6 dpp). Date of parturition was predictable
within 3 days in 75% of cats.
Conclusions and Clinical Relevance—Identification
of bony structures in the fetus is useful in estimating
the time to parturition in queens. (J Am Vet Med
Objective—To compare radius of curvature along the
ulnar trochlear notch of Rottweilers and Greyhounds
to determine whether morphologic differences exist
that may contribute to the cause and pathogenesis of
fragmented coronoid process in Rottweilers.
Sample Population—Paired elbow joints from 13
Rottweilers and 14 Greyhounds.
Procedure—Elbow joints were radiographically
scored on the basis of severity of osteoarthritic
lesions. The articular contour of each ulnar trochlear
notch was digitized. The radius of curvature at
defined points along the ulnar trochlear notch was
compared between breeds.
Results—Radius of curvature of the ulnar trochlear
notch was not a constant function of arc length in
either breed but had a consistent characteristic
appearance in both breeds. Radius of curvature was
greatest at each end of the ulnar trochlear notch and
had 2 peaks in the midportion of the notch in both
breeds. These peaks occurred farther distally in the
notch and were larger in Rottweiler ulnae than
Greyhound ulnae. A significant difference in mean
radius of curvature was detected between breeds at
these peaks. Greyhounds had significantly greater
mean radius of curvature at the end of the medial
coronoid process, compared with Rottweilers.
Conclusions and Clinical Relevance—Radius of curvature
of the ulnar trochlear notch is a complex function
of arc length in Rottweilers and Greyhounds. The
waveform has a consistent characteristic appearance
in both breeds. Although significant differences were
identified between breeds, associations between
these differences and cause or pathogenesis of fragmented
coronoid process in Rottweilers were not
apparent. ( Am J Vet Res 2001; 62:968–973)