Traction

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skeletal traction pin femur orthopedic

This diagnostic image is an anteroposterior (AP) radiograph of the right lower extremity, specifically the knee and distal femur, in an adult patient. The image demonstrates a complex, comminuted fracture of the distal femur. Key radiographic features include significant shortening and impaction of the femoral shaft into the supracondylar region, with a notable varus alignment of the distal fracture fragment. The distal femoral fragment is angled medially relative to the proximal femoral shaft. In the lower portion of the radiograph, elements of a skeletal traction system are visible, including a tibial traction pin (Steinmann pin) passing through the proximal tibia and secured to a metallic traction bow. The soft tissue envelope appears markedly thickened, consistent with clinical context of morbid obesity and traumatic swelling. This visual demonstrates the radiographic appearance of a high-energy femoral fracture and the application of skeletal traction as an initial orthopedic management strategy for length maintenance and fracture reduction.

This diagnostic image is an anteroposterior (AP) radiograph of the right lower extremity, specifically the knee and distal femur, in an adult patient. The image demonstrates a complex, comminuted fracture of the distal femur. Key radiographic features include significant shortening and impaction of the femoral shaft into the supracondylar region, with a notable varus alignment of the distal fracture fragment. The distal femoral fragment is angled medially relative to the proximal femoral shaft. In the lower portion of the radiograph, elements of a skeletal traction system are visible, including a tibial traction pin (Steinmann pin) passing through the proximal tibia and secured to a metallic traction bow. The soft tissue envelope appears markedly thickened, consistent with clinical context of morbid obesity and traumatic swelling. This visual demonstrates the radiographic appearance of a high-energy femoral fracture and the application of skeletal traction as an initial orthopedic management strategy for length maintenance and fracture reduction.

A clinical photograph of a human lower extremity illustrating a proximal skeletal traction setup. The image shows a metal Steinman pin or Kirschner wire inserted transversely through the proximal tibia or distal femur region of the leg. The pin is secured on both ends with protective caps and padded with gauze and adhesive tape at the entry and exit sites to maintain sterility and prevent skin irritation. A metal traction stirrup is attached to the pin, extending distally over the lower leg. A white traction rope is tied to the central eyelet of the stirrup, facilitating the application of longitudinal force for fracture reduction or deformity correction. The leg is positioned supine on hospital linens, and the foot is visible in a neutral to slightly plantarflexed position. This procedural image demonstrates the mechanical components and anatomical placement necessary for stabilizing lower limb injuries or managing pre-operative orthopedic conditions like hip flexion deformities.

A clinical photograph of a human lower extremity illustrating a proximal skeletal traction setup. The image shows a metal Steinman pin or Kirschner wire inserted transversely through the proximal tibia or distal femur region of the leg. The pin is secured on both ends with protective caps and padded with gauze and adhesive tape at the entry and exit sites to maintain sterility and prevent skin irritation. A metal traction stirrup is attached to the pin, extending distally over the lower leg. A white traction rope is tied to the central eyelet of the stirrup, facilitating the application of longitudinal force for fracture reduction or deformity correction. The leg is positioned supine on hospital linens, and the foot is visible in a neutral to slightly plantarflexed position. This procedural image demonstrates the mechanical components and anatomical placement necessary for stabilizing lower limb injuries or managing pre-operative orthopedic conditions like hip flexion deformities.

This set of three lateral-view radiological images (X-rays) demonstrates the management of a chronic patellar fracture with significant diastasis and subsequent pseudoarthrosis. The images highlight a transskeletal patellar traction assembly utilizing an external fixation device and a transversely inserted Steinmann pin in the proximal patellar pole. Superimposed red digital measurement lines quantify the distance between the proximal and distal bone fragments, showing a serial reduction in the gap from an initial wide diastasis to 1.24 cm in the final panel. The radiographs capture the knee in extension, illustrating the orthopedic approach to preoperative fracture reduction via progressive traction. Key anatomical structures visible include the femur, tibia, and the distracted patellar fragments. This visual material is highly relevant for orthopedic surgical training, specifically regarding the treatment of neglected patellar fractures and the use of external skeletal traction for soft tissue and bone mobilization.

This set of three lateral-view radiological images (X-rays) demonstrates the management of a chronic patellar fracture with significant diastasis and subsequent pseudoarthrosis. The images highlight a transskeletal patellar traction assembly utilizing an external fixation device and a transversely inserted Steinmann pin in the proximal patellar pole. Superimposed red digital measurement lines quantify the distance between the proximal and distal bone fragments, showing a serial reduction in the gap from an initial wide diastasis to 1.24 cm in the final panel. The radiographs capture the knee in extension, illustrating the orthopedic approach to preoperative fracture reduction via progressive traction. Key anatomical structures visible include the femur, tibia, and the distracted patellar fragments. This visual material is highly relevant for orthopedic surgical training, specifically regarding the treatment of neglected patellar fractures and the use of external skeletal traction for soft tissue and bone mobilization.

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Orthopedic Traction

Definition

Traction is a stretching force applied to a limb to pull a fracture straight - restoring length and alignment by sustained tension. After appropriate pain control, manual traction along the limb axis will realign fracture fragments; the goal is then to maintain that position until healing or definitive fixation occurs.
  • Bailey and Love's Short Practice of Surgery 28th Ed., p. 5126

Types of Traction

1. Skin Traction (Cutaneous / Buck's Traction)

Applied via adhesive strapping directly to the skin, imparting a tangential force. It is non-invasive and easy to apply, but:
  • Adequate only for small traction forces
  • Risks include skin damage, sensitivity reactions, blistering, and necrosis - especially in elderly patients with fragile skin
  • Not suitable for long-duration or high-load traction

2. Skeletal Traction

A Kirschner wire or Steinmann pin is driven through the bone. Weights are attached via caliper devices. More effective for higher loads and longer durations.
Common pin sites:
  • Distal femur
  • Proximal tibia
  • Calcaneus
Indications:
  • Unstable pelvic ring and acetabular fractures
  • Femoral shaft fractures
  • Intra-articular fracture fragments (to offload cartilage and prevent pressure necrosis)
  • Polytrauma patients not cleared for surgery
  • Acute management of cervical spine fractures
Most common complication: Superficial pin-site infection (~0.6% rate when pins placed for a short period). Threaded pins (screwed into bone) are better than smooth pins as they resist migration and pin-track infection.
  • Sabiston Textbook of Surgery, p. 576-590
  • Rockwood and Green's Fractures in Adults 10th Ed., p. 706-744

Fixed vs. Balanced (Sliding) Traction

FeatureFixed TractionBalanced/Sliding Traction
CounterforceAgainst the patient's own body (e.g., ischial tuberosity via Thomas splint ring)Weight of the patient + friction against the bed
MobilityPatient can be transportedPatient confined to bed
Joint movementLimitedOften possible with careful design
ExampleThomas splintBraun traction, Hamilton-Russell traction
  • Pye's Surgical Handicraft 22nd Ed., p. 61-84

Methods and Named Systems

Six classical methods of skeletal traction (illustrated in the diagram below):
Six methods of skeletal traction - Thomas splint, Braun, Hamilton-Russell, Perkins, Fisk, and 90-90 traction
Six methods of skeletal traction (A=Thomas splint, B=Braun, C=Hamilton-Russell, D=Perkins, E=Fisk, F=90-90). - Rockwood and Green's Fractures in Adults 10th Ed.
A. Thomas Splint (Fixed Traction) The classic war-time splint. A ring fits around the upper thigh, bearing against the ischial tuberosity. The traction cord is attached distally and tightened. The force and counterforce are contained in a closed system. Patient is mobile and can be transported.
B. Braun Traction A weight-and-pulley system providing longitudinal traction along the femoral axis. Simple but affords poor fracture fragment control. Used with skin traction for temporary management before femoral surgery.
C. Hamilton-Russell Traction A single-pulley system that supports the femur AND applies traction. Two pulleys at the foot of the bed give a mechanical advantage: longitudinal pull is theoretically twice the upward pull, resulting in traction at ~30° to horizontal - in line with the femur. Used for upper femoral fractures and hip conditions.
D. Perkins Traction A straight pull along the femoral axis through a proximal tibial pin, without a splint. Femoral alignment control is poor and malunion is common. Advocated early knee mobilization (split bed with knee flexed over the mattress).
E. Fisk Traction A short Thomas splint with a hinged knee piece. Traction is maintained via a proximal tibial pin while the patient can flex hip and knee independently by pulling a separate cord.
F. 90-90 Traction Thigh pulled upward with hip and knee both at 90°. Gravity does not cause posterior sag of femoral fragments - useful for proximal femoral diaphyseal fractures (where iliopsoas flexes the proximal fragment). Still used for pediatric femoral fractures.
  • Rockwood and Green's Fractures in Adults 10th Ed., p. 718-732

Traction Splints (Prehospital)

Devices like the Hare and Sager traction splints use a ratchet-based mechanism. The splint docks distally at the foot and the proximal end rests against the ischium.
Hare traction splint applied for femoral shaft fracture stabilization in the field
Hare traction splint placed at the scene to stabilize a femoral shaft fracture. - Sabiston Textbook of Surgery
These are applied in the prehospital setting by EMS for femoral shaft fractures. It is generally recommended they be removed on arrival to the ED and replaced with definitive traction or fixation.

Advantages and Disadvantages of Traction

AdvantagesDisadvantages
No wound in the zone of injuryRestricts patient mobility
No interference with fracture siteExpensive in hospital time
Materials are cheapSkin pressure complications
AdjustablePin-site infection
Thromboembolic complications
  • Bailey and Love's Short Practice of Surgery 28th Ed. (Table 32.5)

Current Role

Traction has largely been superseded by internal fixation (particularly intramedullary nailing for femoral fractures, which became the standard in the 1970s-1980s). However, it remains important in:
  1. Resource-limited settings where fixation is unavailable
  2. Prehospital first aid before transfer to a surgical facility
  3. Cervical spine fractures (acute management)
  4. Polytrauma patients awaiting clearance for surgery
  5. Pediatric patients (especially 90-90 traction for femoral fractures)
Complications of prolonged traction for femoral fractures include:
  • Malunion/nonunion requiring reoperation: 11-29%
  • Shortening >2 cm: 14-30%
  • Refracture: 4-17%
  • Knee stiffness (the most significant complication): 30-50%
  • Decubitus ulcers
  • Psychological problems, loss of employment (in working-age patients)
  • Rockwood and Green's Fractures in Adults 10th Ed., p. 734-738

Clinical image - skeletal traction in situ:
Steinmann pin through proximal tibia with traction stirrup and rope for skeletal traction setup
Steinmann pin through the proximal tibia with traction stirrup - typical setup for lower extremity skeletal traction
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