Urogenital Surgery Flashcards

1
Q

what is the most common type of neoplasia in the kidneys of dogs?

A

renal carcinoma

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2
Q

where does the urinary tract rupture most commonly?

A

urinary bladder: 55%

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3
Q

what are some causes for urethral obstruction/stricture?

A

secondary to urinary calculi
spay complication
ectopic ureters
bladder or ureteral cancer

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4
Q

when might a nephrectomy be performed due to pyelonephritis?

A

unresponsive to medical treatment

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5
Q

what imaging might be performed prior to a nephrectomy?

A

CT scan
abdominal ultrasonography
thoracic radiographs

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6
Q

what does renal scintigraphy measure?

A

glomerular filtration rate in each kidney

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7
Q

where should you transect ureters in a nephrectomy?

A

close to urinary bladder

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8
Q

what are the complications of nephrectomy?

A

worsening azotemia, uremia
massive hemorrhage

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9
Q

what is the luminal diameter of a cat ureter?

A

0.4 mm

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10
Q

normal ureters insertion on the trigone is ___ shaped

A

“J”

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11
Q

what do 30% of cats have with their ureters?

A

circumcaval ureter on the right

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12
Q

what is the most common cause of ureteral obstruction?

A

calculi

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13
Q

what does a ureteral obstruction cause?

A

decreased renal blood flow
decreased GFR
longer duration means less likely to recover

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14
Q

how can you diagnose ureteral obstruction?

A

abdominal radiographs
abdominal ultrasound
computed tomography

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15
Q

where do calculi usually get stuck in the ureter?

A

proximal and middle ureter

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16
Q

what are the options for surgery on a ureteral obstruction?

A

ureterostomy
ureteroneocystostomy (resection and re-implantation)

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17
Q

what are the complications of ureteral stents?

A

reobstruction- encrustation
dislodgement
pollakiuria/dysuria

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18
Q

what are the complications of subcutaneous ureteral bypass?

A

obstruction/encrustation
leakage
kinking
persistent UTI

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19
Q

are ectopic ureters more common in dogs or cats?

A

dogs

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20
Q

what are the types of ectopic ureters?

A

intramural
extramural
double ureteral opening
ureteral trough

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21
Q

what are the surgical options for intramural ectopic ureters?

A

cystoscopy guided laser ablation
neoureterostomy
ureteroneocystostomy (resection and reimplantation)

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22
Q

what are the urinary bladder problems that would require surgery?

A

urocystoliths
urinary bladder rupture
urinary neoplasia

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23
Q

what is the most common type of urocystolith in female dogs?

A

struvite

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24
Q

do prophylactic antimicrobials impact culture results of samples collected during cystotomy for cystic calculi removal?

A

no

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25
Q

how long do mucosal defects in the normal bladder take to heal?

A

5 days

26
Q

how long do full-thickness defects in the bladder take to regain 100% strength?

A

2-3 weeks

27
Q

how long is hematuria expected after a cystotomy?

A

3-5 days

28
Q

what is the most common cause of a uroabdomen?

A

urinary bladder rupture

29
Q

why is uroabdomen a medical emergency?

A

mild to severe azotemia, hyperkalemia
dehydration
acidosis
collapse

30
Q

what is the penile urethra diameter in male cats?

A

0.7 mm

31
Q

what conditions are associated with the urethra?

A

urethral obstruction
urethral tear
urethral neoplasia

32
Q

why is urethral obstruction a medical emergency?

A

mild to severe azotemia, hyperkalemia: bradycardia
dehydration
acidosis
collapse

33
Q

what are the complications of a urethrotomy?

A

stricture
recurrent obstruction

34
Q

what are the complications of a scrotal urethrostomy?

A

dehiscence
urine extravasation
stricture
persistent hemorrhage

35
Q

what factors are crucial for urethral healing?

A

preservation of mucosal continuity
avoidance of urine extravasation

36
Q

in whom is urethral prolapse most common?

A

young male brachycephalic dogs

37
Q

what are the palliative options for a transitional cell carcinoma in the urethra?

A

urethral stent
permanent cystotomy tube

38
Q

when does pyometra occur?

A

diestrus ~8 weeks after proestrus

39
Q

what is the treatment of choice for pyometra?

A

ovariohysterectomy

40
Q

what are the fetal causes for an emergency cesarean section?

A

relative or absolute fetal oversize
fetal malpresentation
fetal distress
fetal death with putrefaction

41
Q

which breeds are predisposed to dystocia?

A

brachycephalic breeds
scottish terriers

42
Q

is leiomyoma/leiomyosarcoma benign or malignant?

A

benign

43
Q

what is an episioplasty?

A

resection of vulvar skin fold

44
Q

when do testicles descend in dogs?

A

30-40 days after birth

45
Q

why should you remove a cryptorchid testicle?

A

risk of testicular torsion
risk of neoplastic transformation

46
Q

what percentage of animals have been reported to have multiple renal arteries?

A

10%

47
Q

who gets a nephrectomy due to neoplasia most commonly?

A

older
male
medium-to-large dogs

48
Q

how often in urinary tract ruptures does the urethra rupture?

A

25%

49
Q

what diagnostics should you run prior to a nephrectomy?

A

bloodwork- UA, chem, cbc
imaging
renal scintigraphy

50
Q

when is renal scintigraphy optional prior to a nephrectomy?

A

non-azotemic
opposite kidney appears normal on AUS
entire affected kidney structurally abnormal

51
Q

what is the most common location for ureteral obstruction?

A

proximal and middle ureter more than uretero-vesicular junction

52
Q

what are the complications with subcutaneous ureteral bypass?

A

obstruction/encrustation
leakage
kinking
persistent UTI

53
Q

what is the likelihood of persistent incontinence following surgery for ectopic ureters?

A

50%

54
Q

in whom are intramural ectopic ureters common?

A

dogs

55
Q

in whom are extramural ectopic ureters common?

A

cats

56
Q

what catheterization is performed for cystotomy?

A

normograde and retrograde

57
Q

how can you diagnose transitional cell carcinoma?

A

BRAF mutation- PCR urine

58
Q

how much of the bladder wall can be removed if ureteral papillae are not involved?

A

up to 70%

59
Q

what is a common site in male dogs of urethral obstruction?

A

caudal end os penis

60
Q

what are the complications with scrotal urethrostomy?

A

dehiscence
urine extravasation
stricture
persistent hemorrhage

61
Q

what can be seen on bloodwork with pyometra?

A

leucocytosis

62
Q

what maternal causes would indicate an emergency cesarean section?

A

primary or secondary uterine inertia
failure of medical management of uterine inertia
maternal pelvic canal causing obstruction
uterine torsion, rupture, or herniation
significant maternal illness