Bony Pelvic Wall and Pelvic Cavity. Dr. Sama-ul-Haque. Objectives. Name the structures of the pelvic wall (hip, sacrum, muscles and fascia). Identify the general features of the hip and sacrum. Compare between the male and female hip & sacrum.
Bony Pelvic Wall andPelvic Cavity Dr. Sama-ul-Haque
Objectives • Name the structures of the pelvic wall (hip, sacrum, muscles and fascia). • Identify the general features of the hip and sacrum. • Compare between the male and female hip & sacrum. • Recognize the name, type, ligaments & articular surfaces of joints between them. • Describe the anatomy of the pelvic cavity (inlet, outlet, content). • Discuss the general organization of the pelvic organs in male & female. • Describe the peritoneal relations of the pelvic organs.
Bony Pelvis • Hip bone (Ilium, ischium and pubis) • Sacrum • Coccyx • Joined anteriorly by pubic Symphysis • Posteriorly by sacro-iliac joint
The pelvic inlet or brim of the true pelvis is bounded: • Anteriorly:Symphysis pubis, • Laterally: Iliopectineal lines • Posteriorly: Sacral promontory. • The pelvic outlet of the true pelvis bounded: • Anteriorly: : pubic arch • Laterally:ischialtuberosities • Posteriorly: Coccyx • The sacrotuberous ligaments also form part of the margin of the outlet.
The pelvic cavity is the space between the inlet and the outlet. It is a short, curved canal, with a shallow anterior wall and a much deeper posterior wall. • The axis of the pelvis is an imaginary line joining the central points of the anteroposterior diameters from the inlet to the outlet and is the curved course taken by the baby's head as it descends through the pelvis during childbirth.
Greater Pelvis (pelvis major) • Location of some abdominal viscera (ileum and sigmoid colon) • Bounded by abdominal wall anteriorly, the iliac fossa posteriolaterally and L5 & S1 vertebrae posteriorly • Also Known as False Pelvis
Lesser Pelvis ( pelvis minor) • Location of pelvic viscera: the urinary bladder and reproductive organs such as the uterus and ovaries • Bounded by the pelvic surfaces of the hip bones, sacrum, and coccyx • Limited inferiorly by the musculofascial pelvic diaphragm • Also known as True Pelvis
Peritoneum in Pelvis • Continuous with peritoneum of abdomen • Drapes over pelvic viscera in the midline to form: • Pouches • Folds between viscera and pelvic walls