Lambing Period and Neonatal Disease Flashcards
Name 6 common problems at lambing time
Dystocia, prolapses, metritis, mastitis, metabolic disease, abortion
What is ringwomb?
failure of cervix to dilate >5cm w/in 2 hours of onset of 2nd stage of labor
Causes of ringwomb?
Prematurity (abortion?), disturbance during 1st stage of labor, malpresentation, Ca deficiency, exogenous estrogens
Tx of ringwomb?
Manual dilation, hormonal, C-section
How do you tx uterine torsion?
Try casting and rolling ewe to correct - then allow time for cervix to dilate
c-section may be required
You have a old ewe in late pregnancy, with swelling of lower left abdomen (cranial to pubis), extensive ventral edema, and it has difficulty moving / feeding - what do is your diagnosis?
Prepubic tendon rupture
What are ewes with prepubic tendon rupture prone to getting?
pregnancy toxemia
When is c-section indicated in a ewe?
Relative fetal oversize, large pure-bred lambs in posterior presentation, incomplete cervical dilation
describe L block technique of LA for c-section
inverted L-block
50-60 ml 2% procaine (max)
Describe C-section in the ewe
1) Restrain
2) procaine penicillin & flunixin
3) prepare site (L flank)
4) vertical incision midway b/w last rib and wing of ilium
5) open abd muscles using scissors
6) locate uterine horn, exteriorize
7) incision in body of uterus - deliver lamb
8) check for lambs in other horn - remove fetal membranes
9) close incision
10) continuous sutures peritoneum & muscles
11) skin incision (simple interupted or cruciate w. 6.0 monofilament)
12) continue penicillin inj 3d after surgery
When are vaginal prolapses most likely to occur?
during last 4 weeks of pregnancy
Risk factors for vaginal prolapse?
Certain breeds, multiple fetuses, older ewes, bulky feed, high BCS, lack of exercise, steep sloping fields, short docking
Tx of vaginal prolapse?
Retention devices / harnesses
Surgery
cull
Tx of uterine prolapse?
position ewe w/ frog legs
replacement = as for vaginal
Abx for 3-5 days, NSAIDs, Calcium
no need to cull, unlikely to recurr
name 2 most common causes of mastitis in sheep
Mannheimia hemolytica, Staphylococcus aureus
CS of metritis
depression inappetance congested MM vulval swelling / discharge decreased milk production (hungry lambs)
Tx of metritis
Parenteral abx + NSAIDs
4 less common causes of mastitis
Streptococcus spp
E. coli
Leptospira interogans var. hardjo
Maedi-visna virus (indurative mastitis)