
Office: 661-600-1740
23929 McBean Parkway, Suite 200
Valencia, CA 91355
Sarah Blumenthal, MD
Assistant Professor of Orthopaedic Surgery at USC
Conditions Treated
Below are examples of types of conditions that Dr. Blumenthal treats.
Fracture Care
Dr. Blumenthal's specialty is trauma and fracture care. Fractures may occur anywhere in the body, but common places in the upper extremity include:
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Clavicle
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Shoulder (proximal humerus or humeral shaft)
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Elbow (distal humerus, proximal radius, radial head or neck, coronoid, olecranon)
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Forearm (radius or ulna fractures)
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Wrist (distal radius)
Common places in the lower extremity include:
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Hip (proximal femur)
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Thigh (femoral shaft)
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Knee (distal femur, patella, tibial plateau)
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Tibia
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Ankle (medial and/or lateral and/or posterior malleoli)
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Foot (calcaneus, talus, lisfranc)
Hip Arthritis
Hip arthritis is a degenerative condition involving the hip joint. Cartilage acts as a cushion in joints between bony surfaces, and arthritis is a loss of cartilage. Over time, the loss of joint space results in erosion or bony surfaces leading to pain and dysfunction. In severe case, the affected leg may even become shorter than the unaffected leg.
Treatment options include anti inflammatories, injections, physical therapy, weight loss, and ultimately hip replacement surgery if all else fails. Hip replacement surgery, or hip arthroplasty, involves resecting the affected bone and replacing it with metal, ceramic, and plastic components. In most patients these components will last the rest of their lives.
Nonunions and Malunions
Sometimes fractures do not heal properly. This can happen for a variety of recents, whether a fracture was treated with or without surgery. These conditions can be very challenging to treat and require mutual decision-making.
Nonunions:
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Are fractures that did not heal
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Have persistent fracture motion, resulting in pain
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May be atrophic, oligotrophic, or hypertrophic depending on whether the body was able to form new bone
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Can also result from endocrine disturbances or other patient factors
Malunions:
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Are fractures that healed, but in mal-alignment (i.e. the bones did not end up where they are "supposed" to be)
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Do not always require intervention
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May occur in different places of the body with varied symptoms
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Have treatment tailored to patients' symptoms and concerns
Joint Dislocations
Dislocations may be congenital or traumatic. Dr. Blumenthal treats traumatic dislocations, which may have fractures as well. Examples of dislocations would be the elbow, ankle, shoulder, etc. When a joint is dislocated, native structures are placed under tension. Joint dislocations require urgent "reduction" or manipulation to re-align the bones so that soft tissue structures (nerves, arteries, veins) are returned to their native length and location. Typically, acute (traumatic) dislocations require that a patient go to the emergency department for reduction to be performed. Sometimes surgery may additionally be required at a later time point. Sometimes when there is no accompanying fracture, dislocations can be treated with reduction followed by later mobilization and physical therapy.
Tendon Ruptures or Injuries
Trauma may also result in tendon ruptures. An example would be the knee flexing suddenly in response to trauma and a patient sustaining a quadriceps tendon rupture. If the rupture is incomplete, these injuries sometimes can be treated non-operatively. More often with "complete" ruptures, patients will undergo surgical repair or reconstruction. Examples of tendon injuries that Dr. Blumenthal treats are the quadriceps, patellar tendon, Achilles, triceps tendon, and distal biceps ruptures. Some tendon injuries may require treatment by other sub-specialists.
Rehabilitation protocols vary but often involve a period of immobilization followed by therapy. The speed at which a patient rehabs depends on the quality of the tendon and the location of the rupture. Tendon healing can be slow at time, and aggressive motion risks re-rupture. Recovery is a balance between maximizing function and motion while limiting the risk of re-injury.
Limb Lengthening
Limb lengthening or shortening may be performed in the setting of trauma in order to achieve fracture union, or fracture healing. Some patients may also be interested in limb lengthening for other reasons. These surgeries are complex and require careful planning and discussion to understand risks and benefits. Often, multiple procedures are needed.
Examples of techniques used for lengthening include acute correction with osteotomies, the use of circular ring fixators, or even the insertion of intramedullary nails that lengthen over time via communication with an external magnet. This field is constnantly changing and growing!
Sacroiliac Dysfunction
Sacroiliac dysfunction may result from a variety of conditions. Pain tends to localize to the posterior sacral area. It may worsen with certain movements, such as external rotation of the leg.
Pain results from excess motion. While the sacroiliac joint is not a particularly mobile articulation, any ligamentous instability can lead to motion that causes pain. One option is a fusion surgery involving percutaneous placement of fusion implants to reduce the motion at the sacroiliac joint.
Infections and Osteomyelitis
Bone infections have many different names. You may hear them called any of the following:
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Osteomyelitis
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Brodie's abscess
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Septic nonunion
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Septic arthritis
These conditions typically require treatment with a combination of surgery and antibiotics. When hardware is involved, antibiotics do not penetrate bacterial biofilms very well, and operative debridement may be required. These problems are challenging ones to treat, and it can be difficult to find a specialist.










