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Pelvis Unit 7

Pelvimetry Procedure gives 2 way measurement to 3 parts of true pelvis
elongation of femoral necks determines sufficient internal rotation of leg to acheive true pelvis
AP Pelvis good positioning measure from ASIS to table on both sides
innominate or os coxae hip bone
sonography/ultrasound replaced pelvimetry
extends between pubic symphesis and coccyx transverse dimension of outlet
ala wing of ilium
3 divisions between true pelvis inlet, outlet, pelvic cavity
SI Joints synovial amphiarthrodial
symphesis pubis amphiarthrodial
hip diarthrodic
two structures that form hip joint acetabulum and femoral head
largest foramen in body obturator
ischial tuberosity used to correctly place translateral hip radiograph on viewbox
CR for AP Pelvis H/T halfway between ASIS and pubic symphesis S/S mid sag
CR for unilateral AP HIp H/T diagonal line between ASIS and pubic symphesis, bisect, then 2.5' belowGreater trochanter profiled
CR for translateral Hip same as unilateral AP Hip, aim for christmas
Position for frog lateral flex knee, abduct hip
CR for pelvimetry with Colcher-Sussman method perpendicular to mid IR 1.5' superior to pubic symphesis
Obturator foramen boundaries Pubis and ischium
Most inferior structure of pelvis Ischial tuberosity
Most inferior and anterior structure of pelvis pubic symphesis
female pelvis lighter, wider and shallower than males; inlet larger and more oval
female sacrum wider and curves more sharplay posterior
angle of neck of femur 125 degrees superior to shaft
femur neck in anatomical position 15-20 degrees anteriorly
3 joints of hip sacroiliac, hip joint, symphesis pubis
greater trochanter on level of pubic symphesis
top of greater trochanter on level of hip joint
Angles of proximal femur neck to shaft 125 degrees; longitudinal 10; anterior 15-20
how many bones make up the pelvis 4; 2 hip bones, 1 sacrum, 1 coccyx
pelvic girdle hip bones
3 divisions of hip Ilium, ischium, pubis
Position of ilium superior
position of ischium posterior
position of pubis anterior
acetabulum made up of ilium 2/5, ischium 2/5 and pubis 1/5
body of ilium wing or ala
obturator foramen where iscium and pubic bone come together
True pelvis below brim, birth canal
false pelvis above brim, has muscles that hold up organs
pelvimetry xray measures birth canal
AP Pelvis CR midway between ASIS and symphesis pubisLeg internally rotated 15-20 degrees
AP Frog Pelvis (AP Oblique;modified cleaves) CR 2" above smphesis pubis (same as midway between ASIS and symphesis pubis)
AP Hip 10x12 CR: diagonal line between symhesis pubis, bisect, then 2.5" below line;rotate leg internally 15-20 degrees
XTL technique do AP Pelvis first, double mAs and add 10 kVp
Cone add 5-8 kVp
AP Axial Sacrum CR 15 degrees cephalic (20 on females) 2" superior to pubic symphesis
AP Axial Sacrum position supine, knees flexed, shield male patient
AP Axial Coccyx CR 10 degrees caudal 2" superior to pubic symphesis
AP Axial Coccyx Position 10x12 Patient supine, knees flexed, shield male, use cone or collimate well
SI Joints AP Axial CR 30 degrees males, 35 females cephalic, 1.5" superior to pubic symphesis
SI Joints Obliques CR 1" medial to elevated ASIS
SI Joints Oblique position Patient oblique 25-30 degrees, must mark SI in profile
SI oblique tips mark SI in profile, must do both side for comparison
SI oblique RPO,LPO RPO shows left SI, LPO shows right
Lateral Sacrum position lead on table behind patient back, affected side down, knees and hips flexed, support waist
Lateral sacrum CR at level of ASIS and 3.5" posterior
Lateral coccyx position on affected side, knees and hips flexed, support waist
Lateral coccyx CR 2" inferior to ASIS and 3.5" posterior
Lateral sacrum and coccyx 2" inferior to ASIS and 3.5" posterior
Inlet pelvis pelvic trauma, assess posterior displacement of hemipelvis
Inlet CR 40 degrees caudad, at level of ASIS
Inlet...what profiled shows elongation of rim and ischial spine
Outlet pelvis assess superior displacement of the posterior half of pelvis, profiles rami
Outlet CR 30-45 degrees cephalad females, 10-35 males; 2" distal to symphesis pubis
Outlet...what profiled rami without foreshortening
Judet (oblique acetabulum)position 45 degree oblique, affected side down
Judet CR 2" distal and 2" medial to ASIS
Judet RPO Right anterior rim and left posterior rim profiled
Judet LPO Left anterior rim and right posterior rim profiled
XTL position build up hips, unaffected leg 90 degree flexion, foot supported
XTL cassette 10x12 LW to bone
Legg-Perthes disease flattening of femoral head due to vascular interruption
Paget's disease Thick, soft bone marked by bowing and fractures
pelvic cavity region between the inlet and outlet of true pelvis
AP Oblique, Frog Hip (Modified Cleaves)what profiled... femoral heads, necks and trochanteric areas on one radiograph for comparison
Created by: sandonblaise