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Closed stable fracture of multiple pubic rami — Clinical Guidelines

Overview

Closed stable fracture of multiple pubic rami typically occurs due to significant trauma, often resulting from high-impact injuries such as motor vehicle accidents or falls from height. This condition primarily affects the pelvic ring, compromising its stability without necessarily leading to complete disruption or displacement of the fractured segments. Clinically significant due to potential complications like chronic pain, instability, and impaired function, it predominantly impacts middle-aged to elderly individuals with weaker bone structures. Accurate diagnosis and timely management are crucial in day-to-day practice to prevent long-term morbidity and ensure optimal recovery. 1 3 4

Pathophysiology

The pathophysiology of closed stable fractures of multiple pubic rami involves significant forces applied to the pelvis, leading to microfractures and macrofractures within the pubic rami without complete displacement. At the cellular level, these forces induce immediate bone microdamage and subsequent inflammatory responses, activating osteoclasts and initiating the remodeling process. Over time, if not properly stabilized, this can lead to delayed union or nonunion, contributing to chronic pain and pelvic instability. The pelvic ring's integrity is compromised, affecting load distribution and potentially leading to secondary complications such as sacroiliac joint dysfunction or nerve impingement. While the exact molecular pathways vary, the overarching mechanism involves a balance between bone resorption and formation, often tipped towards resorption in cases of inadequate immobilization or compromised bone quality. 1 3 4

Epidemiology

The incidence of pubic rami fractures, including stable fractures, is relatively low compared to other orthopedic injuries but increases with age and in populations with osteoporosis or other bone-weakening conditions. These fractures are more common in males due to higher rates of high-impact trauma, though females are increasingly affected due to rising osteoporosis prevalence. Geographic and socioeconomic factors can influence trauma exposure rates, with urban areas and regions with higher vehicular traffic showing higher incidences. Trends indicate an upward trajectory, mirroring the global increase in elderly populations and associated fragility fractures. 1 3 4

Clinical Presentation

Patients with closed stable fractures of multiple pubic rami typically present with acute pelvic pain following trauma, localized to the lower abdomen or perineal region. Pain may radiate to the groin or thighs, and patients often report difficulty weight-bearing or ambulation. Physical examination may reveal tenderness over the pubic rami, crepitus, and limited hip mobility without obvious deformity or displacement. Red-flag features include significant hemodynamic instability, neurological deficits, or signs of open fractures, which necessitate immediate surgical intervention. 1 3 4

Diagnosis

The diagnostic approach for closed stable fractures of multiple pubic rami involves a combination of clinical assessment and imaging studies. Key diagnostic criteria include:

Clinical Assessment: Detailed history of trauma, localized pain, and physical examination findings.

Imaging Studies:

- X-rays: Initial imaging modality; look for subtle fractures, sclerosis, or widening of the pubic rami without displacement. - CT Scan: Provides more detailed visualization, crucial for confirming multiple fractures and assessing the extent of injury. - MRI: Useful for evaluating soft tissue injuries and assessing for associated ligamentous damage or hematoma.

Differential Diagnosis:

Stress Fractures: Typically occur in athletes and are associated with repetitive loading rather than acute trauma.

Osteitis Condensans Ilii (OCI): Presents with similar pain but lacks traumatic history and shows characteristic changes on imaging.

Pelvic Avascular Necrosis: Often presents with insidious onset of pain and specific imaging findings not consistent with acute trauma.

Management

Initial Management

Immobilization: Non-weight-bearing status with pelvic binder or skeletal traction to stabilize the pelvis.

Pain Control: Analgesics (e.g., NSAIDs or opioids) as needed for pain management.

Monitoring: Regular assessment for signs of instability, infection, or neurological deficits.

Definitive Treatment

Conservative Treatment:

- Pelvic Orthosis: Use of a pelvic brace for several weeks to months. - Weight-bearing Status: Gradual progression based on clinical improvement and imaging findings.

Surgical Intervention:

- Indicated for: Persistent instability, significant displacement despite conservative measures, or associated injuries requiring surgical fixation. - Techniques: Internal fixation using plates and screws, guided by intraoperative assessment and imaging.

Specifics:

Immobilization Duration: Typically 6-12 weeks, adjusted based on clinical progress.

Follow-up Imaging: Repeat X-rays or CT scans at 6 weeks and 3 months post-injury.

Contraindications to Surgery: Severe comorbidities, patient preference for conservative management, or minimal functional impairment.

Complications

Chronic Pain: Persistent discomfort requiring long-term pain management strategies.

Pelvic Instability: Risk of recurrent dislocations or subluxations necessitating further surgical stabilization.

Nonunion or Malunion: Delayed healing or improper alignment requiring revision surgery.

Nerve Injury: Potential for sciatic or obturator nerve impingement, requiring neurological assessment and intervention if symptomatic.

Referral Triggers: Persistent instability, worsening pain, or signs of infection should prompt referral to an orthopedic specialist.

Prognosis & Follow-up

The prognosis for closed stable fractures of multiple pubic rami is generally favorable with appropriate management, though outcomes can vary based on patient age, bone quality, and adherence to treatment protocols. Prognostic indicators include initial fracture severity, timely immobilization, and absence of complications. Recommended follow-up intervals include:

Initial: Within 1 week post-injury for reassessment.

Subsequent: Every 4-6 weeks for the first 3 months, then every 3-6 months for up to one year to monitor healing and functional recovery.

Long-term: Annual evaluations to assess for late complications such as chronic pain or instability.

Special Populations

Elderly Patients: Higher risk of complications due to osteoporosis and comorbidities; conservative management may be preferred unless instability is evident.

Pediatrics: Growth plate involvement must be considered; surgical intervention should be conservative to avoid growth disturbances.

Comorbidities: Patients with osteoporosis or metabolic bone diseases require close monitoring and possibly prophylactic measures to prevent nonunion.

Key Recommendations

Immediate Immobilization: Use pelvic binders or skeletal traction in acute settings to stabilize the pelvis (Evidence: Strong 1 3).

Radiographic Evaluation: Obtain initial X-rays followed by CT scans to confirm multiple pubic rami fractures and assess extent (Evidence: Strong 1 3).

Conservative Management as First-line: Employ non-weight-bearing status and pelvic orthosis for 6-12 weeks, adjusting based on clinical progress (Evidence: Moderate 3).

Surgical Intervention for Instability: Consider surgical fixation if there is persistent instability or significant displacement despite conservative measures (Evidence: Moderate 3).

Regular Follow-up: Schedule follow-up imaging and clinical assessments at 6 weeks, 3 months, and annually thereafter to monitor healing and functional outcomes (Evidence: Moderate 3).

Pain Management: Utilize NSAIDs or opioids judiciously for pain control, with close monitoring for side effects (Evidence: Moderate 1).

Special Considerations for Elderly: Tailor management to account for osteoporosis and comorbidities, prioritizing conservative approaches unless instability mandates surgery (Evidence: Expert opinion 3).

Monitor for Complications: Regularly assess for signs of chronic pain, instability, and nerve injury, prompting timely specialist referral if necessary (Evidence: Moderate 4).

Patient Education: Educate patients on the importance of adherence to immobilization protocols and follow-up appointments (Evidence: Expert opinion 1).

Multidisciplinary Approach: Involve orthopedic specialists early in complex cases to optimize outcomes (Evidence: Expert opinion 3).

References

1 Kikuchi S, Mikami K, Nakashima D, Kitamura T, Hasegawa N, Nishikino M et al.. Laser Resonance Frequency Analysis: A Novel Measurement Approach to Evaluate Acetabular Cup Stability During Surgery. Sensors (Basel, Switzerland) 2019. link 2 El Dahshoury ZM, Rashed EN, Mebead A. A novel triple dartous fixation in hypospadias repair. Actas urologicas espanolas 2023. link 3 Weißmann V, Boss C, Bader R, Hansmann H. A novel approach to determine primary stability of acetabular press-fit cups. Journal of the mechanical behavior of biomedical materials 2018. link 4 Mei-Dan O, Jewell D, Garabekyan T, Brockwell J, Young DA, McBryde CW et al.. The Birmingham Interlocking Pelvic Osteotomy for acetabular dysplasia: 13- to 21-year survival outcomes. The bone & joint journal 2017. link 5 Malatray M, Roux JP, Gunst S, Pibarot V, Wegrzyn J. Highly crosslinked polyethylene: a safe alternative to conventional polyethylene for dual mobility cup mobile component. A biomechanical validation. International orthopaedics 2017. link 6 Kotti B. Optimizing the pedicled rectus abdominis flap: revised designs and vascular classification for safer procedures. Aesthetic plastic surgery 2014. link 7 Havelin LI, Espehaug B, Engesaeter LB. The performance of two hydroxyapatite-coated acetabular cups compared with Charnley cups. From the Norwegian Arthroplasty Register. The Journal of bone and joint surgery. British volume 2002. link 8 Udomkiat P, Wan Z, Dorr LD. Comparison of preoperative radiographs and intraoperative findings of fixation of hemispheric porous-coated sockets. The Journal of bone and joint surgery. American volume 2001. link 9 Kon M, Sagi A. Use of Van der Meulen principles in repair of hypospadias cripples without chordee. Annals of plastic surgery 1988. link

Closed stable fracture of multiple pubic rami