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LIFE. “We must be willing to get rid of the life we’ve planned, so as to have the life that is waiting for us.” -Joseph Campbell. DISEASES OF THE MUSCULOSKELETAL SYTEM. MSK - FUNCTIONS. Support (skeletal system) bones attach structural support for the entire body Storage
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LIFE “We must be willing to get rid of the life we’ve planned, so as to have the life that is waiting for us.” -Joseph Campbell
MSK - FUNCTIONS • Support(skeletal system) • bones attach • structural support for the entire body • Storage • Minerals (calcium) and lipids. • Blood cell production. • site of formation for all types of blood cells. • Protection • vital organs of the body • ribs surround the visceral organs • central nervous system is encased within the skull and spinal cord. • Leverage • Many of the joints of the body act as levers therefore assisting with movement.
Bone anatomy Anatomy of long bones. A) Using the femur as an example of a long bone, Epiphysis is the enlarged area at either end of the bone Diaphysis is the long shaft in the middle portion of the bone Metaphysis is the joining point between the epiphysis and diaphysis The periosteum is the fibrous covering around the outside of the bone not covered with articular cartilage. The endosteum is the fibrous and cellular tissue lining the medullary cavity of the bone
Types - bones vertebrae and certain facial bones humerus, radius, femur, tibia, metacarpals, and metatarsals patella, and proximal and distal sesamoid bones of the digits. carpal and tarsal bones sternum, ribs, scapula, and certain skull bones
MUSCULOSKELETAL SYSTEM:DISRUPTION • TRAUMA • Fractures • Ligament ruptures • Poor conformation • Luxating patella • Degenerative disease: • Osteochondritisdissecans (OCD) • Degenerative joint disease (DJD) • Nonunitedanconeal process INFLAMMATION Myositis Panosteitis NEOPLASIA Osteosarcoma
TRAUMA: CLINICAL SIGNS OF LONG BONE FRACTURES Lameness, swelling, hx of abuse lameness Deformity of bone, swelling
MS Diseases • Fractures • Classification: • ( 1 ) type (e.g ., spiral, comminuted, Salter-Harris) • (2) location (e.g., mid-diaphysis) • (3) position of fracture fragments
Fractures • Incomplete: greenstick, fissure, depression vs. Complete: transverse, oblique, spiral, comminuted (multiple pieces, fracture line interconnects) • Open (compound) – broken skin vs. Closed (simple) – intact skin • Simple – 1 break: oblique, transverse, incomplete vs. comminuted or multiple fracture • Stable – ends apposed and fixed (i.e. greenstick) vs. Unstable • Compression: vertebrae
Trauma – Incomplete – long bones Greenstick fracture Fissure fractures
Trauma - Long bone fractures - Complete Spiral Fractures: 1 part of bone is twisted Comminuted fracture
Trauma - Long bone fractures - Complete Oblique fracture Transverse fracture
TRAUMA: OPEN VS. CLOSED FRACTURES In open fractures bone is exposed through the skin
TRAUMA: METHODS OF FIXATION OF LONG BONE FRACTURES SPLINTS It is critical that the splint support both the joint above and below the injury !
TRAUMA: METHODS OF FIXATION OF LONG BONE FRACTURES Splints Plastic splint METASPLINT
ROBERT JONES BANDAGE • Especially useful for traumatized extremities with a great deal of swelling or edema • After knee surgery
TRAUMA: METHODS OF FIXATION ON FRACTURES SCHROEDER-THOMAS SPLINT SPLINTS immobilize any fracture distal to the midfemur or midhumerus
CASTS • Casts can be made for the entire body, as for spinal injuries, for any portion of the body (spica cast), or for just the extremities.
TRAUMA: METHODS OF FIXATION OF FRACTURES IM pins with cerclage wires, Need other methods to prevent Rotation and compressive forces
TRAUMA: METHODS OF FIXATION OF LONG BONE FRACTURES Bone plates and screws
TRAUMA: METHODS OF FIXATION External fixators are pins that penetrate the skin and bones that are attached to fixed bars or acrylic using special clamps
Bone Fractures – Client Info • Restrict activity • Watch for drainage, swelling, heat • Metal (plate, pin) stronger than bone – refracture may occur • Follow up x-rays necessary • Metal should be removed after healing • Metal may cause cold sensitivity
LET IT GO! “People have a hard time letting go of their suffering. Out of a fear of the unknown, they prefer suffering that is familiar.” -Thich Nhat Hahn
Ligament Injury – Anterior Cruciate Ligament • ACL and PCL (posterior cruciate ligament) stabilize knee joint • Intra-articular structures • Ruptured ACL – most common knee injury => DJD • May be complete rupture or partial tear => unstable joint => DJD
TRAUMA: CLINICAL SIGNS OF CRANIAL CRUCIATE LIGAMENT INJURY/RUPTURE Middle-aged obese dog Highly active, athletic animals ACUTE
TRAUMA: CLINICAL SIGNS OF CRANIAL CRUCIATE LIGAMENT INJURY/RUPTURE Animal is non wt. bearing on the rear leg Exercise: hyperextend stifle joint Joint effusion
TRAUMA: CCL RUPTURE Cranial drawer test + in CCL Tibial compression test stabilize the dog’s femur with one hand, while flexing the ankle with the other: + tibia goes forward
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE http://www.youtube.com/watch?v=9jg9E2nBt_E&feature=related
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE REPAIR Extra-articular Stabilization *Most successful in patients less than 15kg From flabella to tibial crest and imbrication of joint
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE REPAIR Intra-articular stabilization – Over-the-top patellar tendon graft The graft is usually passed through drill holes in the femur and tibia and, is attached to the soft tissues of the femur or tibia.
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE http://www.youtube.com/watch?v=4nU2QZjjByg
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE REPAIR Intra-articular stabilization technique TPLO – Tibial Plateau Leveling Osteotomy
TRAUMA: CRANIAL CRUCIATE LIGAMENT RUPTURE http://www.youtube.com/watch?v=-1pxxX4TXko&feature=fvw
ACL – Client info • Restrict activity 3-4 weeks post surgery • Cage rest • Leash walk only to urinate and defecate • Gradually increase exercise 4-8 wks post sx • Full activity 8-12 weeks • Opposite cruciate often tears within 1 yr • Weight loss helps • DJD of stifle joint likely • If no surgery, joint thickens - fibrosis
ACCEPT YOURSELF “There’s a period of life when we swallow a knowledge of ourselves and it becomes either good or sour inside.” - Pearl Bailey
POOR CONFORMATION: LUXATING PATELLA PATELLA IN GROOVE PATELLA OUT OF GROOVE
POOR CONFORMATION BOW-LEGGED STANCE MAY OCCUR IN MEDIAL LUXATIONS KNOCK-KNEED/PIGEON-TOED, OR COW-HOCKED STANCE MAY OCCUR IN LATERAL LUXATIONS
POOR CONFORMATION: TREATMENT OF PATELLAR LUXATION TROCHLEAR WEDGE RESECTION
http://video.google.com/videosearch?hl=en&q=patella+luxation+surgery&um=1&ie=UTF-8&sa=N&tab=wv#http://video.google.com/videosearch?hl=en&q=patella+luxation+surgery&um=1&ie=UTF-8&sa=N&tab=wv# • http://www.youtube.com/watch?v=GfnQbIk284g
POOR CONFORMATION: HIP DYSPLASIA YOUNG DOGS AND MATURE ANIMALS WITH CHRONIC DISEASE
POOR CONFORMATION: HIP DYSPLASIA • HX • Decreased activity • Difficulty rising • Reluctance to run, jump, climb • Intermittent or persistent hind limb lameness; worse after exercise • Bunny hopping or swaying gait • Narrow hind limb stance
POOR CONFORMATION: HIP DYSPLASIA Poor conformation combined with genetic, environmental and nutritional factors