30. The bony and the soft birth canal in cattle

Question 1

The bony part of the birth canal?

Answer 1

The Bony Part of the Birth Canal

Components:

• os coxae (os ilei, os ishii, os pubis)
• os sacrum
• coccygeal vertebrae
• pelvic ligaments

Question 2

Diameters?

Answer 2

Diameters:

• Conjugata vera Type of pelvis
• Conjugata diagonalis (Ratio)
• Diameter obliqua maxima
• Diameter verticalis
• Diam. transversa apert. pelvis cranialis dorsails

o Diam. transversa apert. pelvis cranialis intermedia

o Diam. transversa apert. pelvis cranialis ventralis

• Diameter transversa media
• Diameter transversa aperturae pelvis caudalis
• Distantia tuberalis coxae

Question 3

Linea directiva?

Answer 3

Linea directiva

• The axis pelvis
• The line that connects the midpoints of the vertical diameters of the pelvis
• In the cow we pull downwards

Question 4

Soft part of the birth canal?

Answer 4

The Soft Part of the Birth Canal:

Components:

• Corpus uteri
• Cervix, vagina
• Hymen
• Vestibulum
• Vulva
• Perineum

Question 5

Types of soft Canal?

Answer 5

Types of Soft Canal:

• Direct- all other species
• Refracted (broken): only in the bitch

Question 6

Critical sizes?

Answer 6

Critical sizes

1. Cervix
2. Hymen
3. Vulva

Question 7

The soft part of the birth canal?

Answer 7

The soft part of the birth canal

• Failure of the vulva, vestibulum, vagina and cervix to dilate
• Failure of the cervix to dilate of involutional origin