Ovariectomy, Ovary Sparing Spay, and Vasectomy

Question 1

Removal of both ovaries and uterus
- Open approach

Answer 1

Ovariohysterectomy - OHE

Question 2

Removal of ovaries alone
- Open Approach
- Ventral midline
- Flank
- Minimally invasive

Answer 2

Ovariectomy (OV)

Question 3

Removal of both testicles

Answer 3

Castration

Question 4

Pregnancy can be ceased or obstructed by _______________, however, it will not remove or eliminate the heat cycles

Answer 4

tubal ligation

Question 5

The uterus lies between the:

Answer 5

Bladder and the colon

Question 6

Ligamentous attachment of the ovary to the body wall at the:

Answer 6

Last 2 ribs

Question 7

Ovaries remain intact providing gonadal hormones

Answer 7

Ovary Sparing Spay (Complete Hysterectomy)

Question 8

(T/F) When performing the ovary-sparing spay, both ovaries are retained and the uterus is completely removed by excision at the level of the proper ligaments and transecting the uterine body above the cervix

Answer 8

False

Question 9

(T/F) The risk of pyometra is increased if ovariectomy is performed

Answer 9

False

Question 10

Vasectomy in male dogs eliminates the possibility of impregnating females by severing or obstructing what anatomical structure?

Answer 10

Vas Deferens

Question 11

List the procedure for an OSS:

Answer 11

• Transection of Proper ligament between ovaries and uterine horn maintaining ovarian blood supply
• Disruption of the broad ligament along each uterine horn to the level of the vagina (below cervix)
• Ligation of uterine blood supply on each side of the vagina
• Transection below below the cervix at the level of the vagina

Question 12

• Transection, Ligation, or sealing of “Fallopian tube”
• Uterus remains
• Increased risk of Pyometra

Answer 12

Tubal Ligation

Question 13

What are the Down Sides of OSS?

Answer 13

Females continue to manifest heat cycles
- Bleeding
- Attractive to males
- Incontinence while in heat
- UTI
Behavioral changes
- False Pregnancy
Risk of ovarian tumors
No Protection against MGT

Question 14

Surgical Approaches for Vasectomy:
Must incise vaginal tunic to expose Deferent Duct
testicular blood supply

Answer 14

Prescrotal

Question 15

Surgical Approaches for Vasectomy:
- Deferent Duct exits the inguinal ring crosses over the top of the ureter and enters the Colliculus Seminalis of the Prostate traversing into the urethra
- Can be performed Minimally Invasive

Answer 15

Intra-abdominal

Question 16

Vasectomy – Down Sides?

Answer 16

• Continued effect of androgenic hormones
• Progression of BPH
• Prostatic diseases
  - Cystic prostate
  - Inflammation/infection
• Neoplasia of testicles
• Increased risk of Perineal hernia