Related Experiment Video
Updated: Feb 16, 2026

03:57
Transverse Fracture of the Mouse Femur with Stabilizing Pin
Published on: December 29, 2021
4.2K
Humeral shaft fractures
Gary F Updegrove1, Wassim Mourad2, Joseph A Abboud1
1The Rothman Institute, Philadelphia, PA, USA.
Journal of Shoulder and Elbow Surgery
|January 3, 2018
Summary
Humeral shaft fractures are common. Evolving understanding suggests operative intervention may be better for some patients, especially those with specific fracture patterns or risk factors.
Area of Science:
- Orthopedic Surgery
- Traumatology
Background:
- Humeral shaft fractures are frequent injuries with diverse treatment options.
- Nonoperative management is often considered standard but may not yield optimal outcomes for all patients.
Purpose of the Study:
- To review current management strategies for humeral shaft fractures.
- To highlight factors influencing treatment decisions and the evolving role of operative intervention.
Main Methods:
- Review of current literature on humeral shaft fracture management.
- Discussion of various surgical techniques including open reduction internal fixation, intramedullary nailing, and external fixation.
- Consideration of periprosthetic fractures in the context of increasing shoulder arthroplasty rates.
Main Results:
- Fracture pattern, location, and patient risk factors can predict outcomes with nonoperative treatment.
- Earlier surgical intervention may be beneficial for select patient groups.
- Specific considerations exist for periprosthetic humeral shaft fractures.
Conclusions:
- Treatment recommendations for humeral shaft fractures are evolving beyond traditional nonoperative approaches.
- Personalized treatment strategies considering fracture characteristics and patient factors are crucial.
- Operative management offers viable alternatives for achieving better outcomes in complex cases.
Related Concept Videos
Stresses in a Shaft
927
The shaft PQ is subjected to a twisting force when equal and opposite torques are applied on either side. A section that cuts perpendicular to the shaft's axis at any arbitrary point R is examined to understand this. When the free-body diagram of the QR segment is analyzed, it reveals the shearing forces exerted by the PR portion onto the QR segment as the shaft experiences twisting.
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
Applying equilibrium conditions to the QR segment establishes that the internal shearing forces within the...
927
Deformation in a Circular Shaft
948
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
948
Transmission Shafts: Problem Solving
530
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
530
Design of Transmission Shafts
800
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
800
Thin-Walled Hollow Shafts
596
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
596
Stress Concentrations in Circular Shafts
587
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
587

