# Surgical Approaches to the Humerus and Elbow


## Key Takeaways

- Surgical approaches to the humerus and elbow necessitate careful consideration of fracture location, configuration, and biomechanical forces, balancing visualization needs with the risk of iatrogenic neurovascular injury, particularly to the radial nerve.
- Patient positioning is critical, with lateral recumbency being standard for most humeral approaches, while sternal or dorsal recumbency may be required for specific proximal or medial elbow exposures, respectively.
- The radial nerve is the primary neurovascular structure at risk during lateral humeral shaft approaches, requiring explicit identification, isolation, and gentle retraction to prevent injury.
- Distal humeral fractures, especially those involving the condyles, often demand extensive articular exposure, potentially necessitating an olecranon osteotomy or combined medial and lateral approaches for adequate visualization and reduction.
- Implant selection, including locking plates, conventional plates, or intramedullary devices, is guided by fracture pattern and bone quality, with a focus on achieving stable fixation to neutralize bending, torsional, and axial loads.
- Postoperative monitoring should include serial neurologic examinations to detect radial nerve deficits and radiographic assessment at 4-8 weeks to evaluate implant position, fracture healing, and callus formation.

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This article provides a structured reference for surgical exposure of the humerus and elbow joint in dogs and cats, with emphasis on fracture repair and elective elbow procedures. It is written for practicing veterinarians who perform or assist in orthopedic surgery and require a working knowledge of approach selection, patient positioning, and implant placement considerations. The content addresses the procedural question of which approach to choose for a given humeral or elbow lesion and how to execute that approach safely.

The humerus presents unique surgical challenges. It is a weight-bearing long bone with substantial muscle mass surrounding it, and its proximal and distal ends are intimately associated with the shoulder and elbow joints. The radial nerve spirals around the humeral shaft, and the brachial plexus and major vessels lie medially. Exposure must balance the need for visualization against the risk of iatrogenic neurovascular injury. The elbow joint, by contrast, is a complex hinge joint with multiple articular surfaces and a tightly conforming joint capsule, which can make adequate visualization difficult without proper technique.

Approach selection depends on the fracture location and configuration, the planned implant, and the surgeon's familiarity with the exposure. Proximal humeral fractures may be addressed through a craniolateral approach to the shoulder, while diaphyseal fractures often require a lateral or craniolateral approach to the humeral shaft. Distal humeral fractures, particularly those involving the condyles, demand approaches that provide access to the medial and lateral aspects of the elbow. Each approach carries specific risks and limitations, and the surgeon must weigh these against the benefits of exposure.

## At a Glance

| Parameter | Consideration |
|---|---|
| Patient positioning | Lateral recumbency for most humeral approaches, sternal recumbency for some proximal exposures, dorsal recumbency for medial elbow approaches |
| Primary neurovascular risk | Radial nerve (spiral groove, lateral humerus), median and ulnar nerves (medial humerus), brachial artery and vein |
| Proximal humerus exposure | Craniolateral approach to shoulder, deltoid split or elevation for plate placement |
| Humeral shaft exposure | Lateral or craniolateral approach, radial nerve identification and protection |
| Distal humerus exposure | Lateral and medial approaches to elbow, osteotomy of olecranon for extensive articular exposure |
| Elbow joint exposure | Lateral approach for most procedures, medial approach for medial coronoid disease, combined approaches for complex fractures |
| Implant placement | Plates applied laterally or cranially, screws placed to avoid radial nerve and joint surfaces |
| Postoperative monitoring | Serial neurologic examination, radiographs at 4 to 8 weeks, gait assessment |

## Anatomic Foundations for Surgical Exposure

The humerus is enveloped by musculature that must be reflected or split to expose bone. The deltoid muscle covers the proximal third, the brachiocephalicus and superficial pectoral muscles lie cranially, and the triceps brachii complex covers the caudal and lateral aspects. The biceps brachii and brachialis muscles cross the cranial aspect of the distal humerus. Understanding the intermuscular septa and fascial planes allows the surgeon to develop approaches that minimize muscle trauma.

The radial nerve is the most important structure to protect during humeral surgery. It arises from the brachial plexus, passes distally between the medial and lateral heads of the triceps, and spirals around the lateral surface of the humerus in the musculospiral groove. From there it pierces the lateral intermuscular septum to innervate the extensor muscles of the antebrachium. The nerve is vulnerable during lateral approaches to the humeral shaft, particularly in its spiral course. The median and ulnar nerves, along with the brachial artery and vein, course along the medial aspect of the humerus and are at risk during medial approaches.

The elbow joint is formed by the humeral condyle articulating with the radial head and the trochlear notch of the ulna. The joint capsule attaches proximal to the humeral epicondyles and distal to the annular ligament. The lateral collateral ligament and the medial collateral ligament provide stability. The radial nerve crosses the lateral aspect of the elbow, while the median nerve and brachial artery pass medially. The ulnar nerve courses caudal to the medial epicondyle.

## Biomechanical Principles of Humeral Fixation

Humeral fractures are subject to bending, torsional, and axial loads during weight bearing. The proximal humerus experiences significant shear forces from the pull of the supraspinatus, infraspinatus, and deltoid muscles. The distal humerus, particularly the condylar region, is subjected to complex loading during elbow flexion and extension. Fixation must neutralize these forces to allow bone healing.

Locking plate systems provide angular stability and are well suited to the metaphyseal bone of the proximal and distal humerus, where screw purchase can be compromised in osteopenic bone. Biomechanical testing of proximal humerus fracture implants in human orthopedics has shown substantial heterogeneity in testing methods, with locking plates being the most commonly evaluated implant type [biomechanical testing of proximal humerus fracture implants](https://pubmed.ncbi.nlm.nih.gov/26223275/). This heterogeneity complicates direct comparison of implant performance, and the surgeon should rely on principles of stable fixation instead of implant-specific claims.

Intramedullary pins or interlocking nails can be used for diaphyseal fractures, but they provide limited rotational stability unless combined with adjunctive fixation. Plate fixation remains the most versatile option for most humeral fractures because it allows anatomic reduction and rigid stabilization. The choice between a single lateral plate and dual plates depends on fracture configuration and bone quality.

## Soft Tissue Healing and Adhesion Formation

Open reduction and internal fixation of humeral fractures requires dissection through muscle and periosteum, which inevitably creates soft tissue injury. Post-surgical adhesions between the deep surface of the deltoid muscle and the fracture fixation zone can limit shoulder motion and may necessitate implant removal. A rat model of post-surgical shoulder adhesions demonstrated that trauma to the undersurface of the deltoid and supraspinatus tendon produces limited passive range of motion and periosteal fibrosis [a rat traumatized shoulder model for the study of post-surgical adhesions](https://pubmed.ncbi.nlm.nih.gov/40585788/). This finding underscores the importance of gentle tissue handling, meticulous hemostasis, and early postoperative range of motion exercises.

The application of anti-adhesive materials at the time of closure is an area of active investigation. In the same rat model, treatment with an alginate mimetic injected into the wound before closure resulted in greater passive range of motion and reduced periosteal fibrosis compared with untreated controls. Clinical translation of such materials in veterinary orthopedics remains limited, and the surgeon should focus on surgical technique to minimize adhesion formation.

## Bone Healing Considerations

Fracture healing after humeral repair depends on mechanical stability, vascularity, and systemic factors. Vitamin D status may influence fracture healing, although the evidence base is mixed. A short review of the literature identified 13 studies, with positive effects of vitamin D supplementation on healing reported in some animal studies and in one randomized trial in elderly women with proximal humerus fractures [vitamin D supplementation and fracture healing](https://pubmed.ncbi.nlm.nih.gov/23569676/). The authors concluded that a clear statement on the benefits of vitamin D for fracture healing awaits further trials. In veterinary patients, ensuring adequate calcium and vitamin D intake through a balanced diet is reasonable, but routine supranutritional supplementation is not supported by current evidence.

Advanced biologic strategies, such as growth factor delivery, remain experimental in veterinary practice. A nanoscale coating technology delivering ultralow-dose bone morphogenetic protein-2 achieved complete healing of a critical-sized bone defect in a mouse model and was applied successfully in a Münsterländer dog with a nonhealing humerus fracture [nanoscale coatings for ultralow dose BMP-2 driven bone regeneration](https://pubmed.ncbi.nlm.nih.gov/30693176/). This single clinical case demonstrates feasibility but does not establish a general treatment protocol. Standard autogenous cancellous bone grafting remains the most reliable biologic adjunct for delayed union or nonunion.

## Patient Positioning and Preparation

Positioning determines the achievable exposure and the ease of implant application. For the proximal humerus and shoulder region, the patient is placed in lateral recumbency with the affected limb uppermost. The dependent forelimb is pulled caudally and secured, and a vacuum bag or sandbag supports the thorax to keep the spine perpendicular to the table. The uppermost limb is suspended or held by an assistant to allow circumferential draping, then released into the surgical field once the limb is prepared.

For distal humeral and elbow approaches, lateral recumbency with the affected limb uppermost is standard. The elbow is positioned at the edge of the table to permit full flexion and extension during the procedure. The limb is clipped from mid-humerus to the carpus, and the foot is wrapped to prevent contamination of the field when the limb is manipulated. A hanging limb preparation is preferred for the distal humerus because it allows access to the medial and lateral aspects without repositioning.

Medial approaches to the elbow require the patient in lateral recumbency with the affected limb dependent, or in dorsal recumbency with the limb abducted and externally rotated. The choice depends on whether concurrent procedures on the lateral compartment are planned. If both medial and lateral exposures are anticipated, dorsal recumbency with the limb draped free offers the greatest flexibility.

## Approach Selection by Fracture Location

The humerus is divided into proximal, diaphyseal, and distal regions, each with preferred approaches. Fracture configuration, implant type, and surgeon experience modify the selection. The following table summarizes the standard approaches and their indications.

| Fracture Location | Approach | Patient Position | Primary Indications | Limitations |
|---|---|---|---|---|
| Proximal humerus, capital physis | Craniolateral approach to the shoulder | Lateral recumbency, affected limb uppermost | Capital physeal fracture, proximal metaphyseal fracture | Limited distal extension |
| Proximal humeral diaphysis | Craniolateral approach to the humerus | Lateral recumbency, affected limb uppermost | Plate application on craniolateral surface | Musculocutaneous nerve retraction required |
| Mid-diaphysis | Lateral approach to the humerus | Lateral recumbency, affected limb uppermost | Plate or interlocking nail placement | Radial nerve must be identified and protected |
| Distal diaphysis, supracondylar | Lateral approach with olecranon osteotomy | Lateral recumbency, affected limb uppermost | Supracondylar fracture, distal diaphyseal fracture | Osteotomy adds morbidity and requires repair |
| Distal humeral condyle, medial epicondyle | Medial approach to the elbow | Dorsal recumbency, limb abducted | Medial condylar fracture, medial epicondylar avulsion | Limited access to lateral structures |
| Lateral humeral condyle | Lateral approach to the elbow | Lateral recumbency, affected limb uppermost | Lateral condylar fracture, lateral epicondylar avulsion | Ulnar nerve at risk with excessive retraction |
| Intra-articular, comminuted distal humerus | Trans-olecranon approach | Lateral recumbency, affected limb uppermost | Comminuted intra-articular fracture, arthroplasty | Requires precise osteotomy reduction |

The radial nerve is the principal structure at risk in diaphyseal approaches. It crosses the lateral surface of the humerus from medial to lateral, roughly at the junction of the middle and distal thirds. The nerve must be identified, isolated on a moistened Penrose drain, and retracted gently throughout the procedure. The musculocutaneous nerve lies cranially and is less frequently injured but should be protected during craniolateral approaches.

## Step-by-Step Approach Checklists

### Craniolateral Approach to the Proximal Humerus

1. Incise the skin from the acromion to the proximal third of the humerus, curving slightly caudally.
2. Incise the superficial fascia along the same line.
3. Identify the acromial head of the deltoideus muscle and the superficial pectoral muscle.
4. Incise the deep fascia between the acromial head of the deltoideus and the brachiocephalicus muscle.
5. Retract the deltoideus caudally and the brachiocephalicus cranially to expose the greater tubercle and proximal humeral shaft.
6. For capital physeal fractures, incise the joint capsule parallel to the glenoid rim to expose the femoral head analogue, the humeral head.
7. Reduce the fracture under direct vision and apply the chosen implant.

### Lateral Approach to the Humeral Diaphysis

1. Incise the skin from the greater tubercle to the lateral epicondyle, following the cranial border of the triceps muscle.
2. Incise the superficial fascia and identify the lateral head of the triceps caudally and the brachialis muscle cranially.
3. Incise the deep fascia along the cranial border of the lateral head of the triceps.
4. Identify and isolate the radial nerve as it crosses the lateral humeral surface.
5. Retract the triceps caudally and the brachialis cranially to expose the humeral shaft.
6. Elevate the brachialis muscle cranially to expose the craniolateral surface for plate application.
7. Protect the radial nerve with moistened sponges during drilling and tapping.

### Trans-Olecranon Approach to the Distal Humerus

1. Incise the skin from the distal third of the humerus to the proximal ulna, curving around the olecranon.
2. Incise the superficial and deep fascia to expose the triceps tendon and the olecranon.
3. Perform a chevron osteotomy of the olecranon at the level of the anconeal process, using an oscillating saw or osteotome.
4. Reflect the olecranon and triceps mechanism proximally to expose the distal humerus and the caudal joint capsule.
5. Incise the joint capsule to expose the humeral condyles and the intra-articular fracture surfaces.
6. Reduce and stabilize the fracture, then repair the osteotomy with a tension band wire or a small plate and screws.
7. Close the joint capsule, then reappose the triceps tendon and the osteotomy site.

### Medial Approach to the Elbow

1. Incise the skin along the medial aspect of the distal humerus and proximal ulna.
2. Identify and protect the median nerve, the ulnar nerve, and the brachial artery, which lie in the fascial plane between the biceps and the medial head of the triceps.
3. Incise the deep fascia and retract the biceps cranially and the triceps caudally.
4. Elevate the origin of the pronator teres muscle from the medial epicondyle if additional exposure of the joint is required.
5. Incise the joint capsule to expose the medial coronoid process and the medial humeral condyle.
6. For medial coronoid disease, use a small arthrotomy or an arthroscopically assisted approach to limit morbidity.

## Implant Selection and Placement Considerations

Plate selection depends on the fracture location and the patient's size. Locking plates are preferred for metaphyseal and intra-articular fractures in small breed dogs and cats, where screw purchase in the epiphyseal segment is limited. Non-locking plates remain appropriate for simple diaphyseal fractures in larger patients with good bone quality. The biomechanical literature on proximal humerus fracture implants in human orthopedics shows substantial heterogeneity in testing methods, with locking plates, intramedullary devices, and non-locking plates all evaluated under different loading protocols. This heterogeneity limits direct translation of implant performance data to veterinary patients.

Intramedullary pins or interlocking nails are options for mid-diaphyseal fractures. The nail must fill at least 70 percent of the medullary canal diameter at the isthmus to provide rotational stability. For distal fractures, the nail must not violate the olecranon fossa, as this will block extension.

External skeletal fixators are reserved for open fractures, infected non-unions, or fractures with severe soft tissue compromise where plate application is contraindicated. A type II or type III fixator configuration is typically required for the humerus because of the large soft tissue envelope and the forces generated by the triceps mechanism.

## Monitoring and Documentation

Intraoperative monitoring focuses on the radial nerve and the vascular supply to the distal limb. After implant placement, the limb is taken through a full range of motion to confirm that the implant does not impinge on the joint or the nerve. The radial nerve is palpated along its course to confirm that it is not compressed by the plate or trapped beneath the implant.

Postoperative radiographs are obtained in two orthogonal views to document implant position, fracture reduction, and joint congruity. The radiographs are reviewed for screw penetration into the joint, particularly in the distal humerus where the olecranon fossa and the radial and ulnar articular surfaces are at risk.

Documentation should include the approach used, the structures encountered and protected, the implant type and size, the screw positions, and any intraoperative complications. Photographs of the exposed fracture and the final construct are useful for medical records and for client communication.

Postoperative monitoring includes assessment of limb use, incisional healing, and neurologic status. The radial nerve is assessed by evaluating the patient's ability to extend the carpus and digits. Loss of extensor function indicates radial nerve injury and warrants immediate re-evaluation of the implant position. The American College of Veterinary Surgeons provides client-oriented summaries of expected outcomes and postoperative care that can supplement discharge instructions.

## Complications and Failure Modes

Fixation failure remains the most frequently reported sequela of proximal humeral fracture management, and the biomechanical literature supporting implant choices is heterogeneous in both specimen type and testing protocol [biomechanical testing of proximal humerus fracture implants](https://pubmed.ncbi.nlm.nih.gov/26223275/). In clinical practice, the earliest detectable sign of construct failure is often a change in weight-bearing posture instead of overt lameness. Serial orthogonal radiographs at two and six weeks postoperatively allow comparison of fracture gap width, implant position, and callus progression. Loss of reduction is confirmed when the fracture gap widens by more than 2 mm or when implant migration is visible on sequential studies.

Implant loosening presents with progressive lameness, peri-implant radiolucency, and sometimes a palpable crepitus over the implant. Screw pullout in the proximal segment is more common in osteoporotic bone and in comminuted fractures where screw purchase is limited to the subchondral plate. Delayed union is diagnosed when no bridging callus is visible at eight weeks in a diaphyseal fracture. Nonunion is confirmed when the fracture line remains visible at sixteen weeks with sclerotic margins and a persistent gap.

Infection is detected through focal swelling, sinus tract formation, or persistent serous drainage. Early deep infection may present with only malaise and a rising fever. Radiographic signs of osteomyelitis, including periosteal new bone formation and regional osteopenia, lag behind clinical signs by several weeks. Serial C-reactive protein measurement can support the diagnosis but is not specific. Aerobic and anaerobic culture of deep tissue samples obtained at surgery or by needle aspiration is the definitive diagnostic step.

Postoperative adhesions between the deep surface of the deltoid and the fracture fixation zone are a recognized cause of restricted shoulder motion after open reduction and plating of proximal humeral fractures [rat traumatized shoulder model for the study of post-surgical adhesions](https://pubmed.ncbi.nlm.nih.gov/40585788/). Reduced passive flexion and extension, with normal radiographs, points to adhesion formation instead of implant failure. The distinction matters because adhesions may respond to physiotherapy, whereas implant failure requires revision.

| Observation | Likely cause | Discriminating check |
|---|---|---|
| Progressive lameness at 4 to 6 weeks | Implant loosening or loss of reduction | Radiographic comparison of fracture gap and implant position |
| Restricted shoulder motion, normal radiographs | Periarticular adhesion formation | Passive range of motion under sedation compared with the contralateral limb |
| Persistent drainage or sinus tract | Deep infection | Deep tissue culture, not surface swab |
| Fracture line visible at 16 weeks | Nonunion | Radiographic evidence of sclerotic margins and persistent gap |
| Sudden severe lameness after initial improvement | Acute implant failure | Immediate orthogonal radiographs, assess for catastrophic screw or plate breakage |

## Common Errors and Corrective Actions

The most frequent error in humeral approach selection is choosing a lateral diaphyseal approach for a fracture that extends into the proximal metaphysis. The exposure is inadequate for proximal plate placement, and the surgeon is forced to struggle with soft tissue retraction that compromises the radial nerve. The corrective action is to extend the approach proximally into a craniolateral exposure before committing to the osteotomy or plate contouring.

Inadequate proximal screw purchase is a second recurring error. Placing all screws in the distal fragment and only one or two in the proximal segment invites early failure under the bending loads of weight bearing. The surgeon should verify that at least three screws engage the proximal fragment, with at least one directed into the humeral head.

Radial nerve injury is the most consequential technical error in diaphyseal approaches. The nerve is at greatest risk during retraction of the triceps muscle and during drilling of the lateral cortex. The corrective habit is to identify the nerve explicitly before placing any retractor deep to the triceps and to re-verify its position before drilling each hole.

Students and less experienced surgeons frequently underestimate the soft tissue trauma caused by aggressive retraction. The resulting swelling and adhesion formation can be more disabling than the original fracture. The corrective action is to enlarge the skin incision instead of increase retraction force, and to handle bone fragments with pointed reduction forceps instead of periosteal elevators.

## Evidence Limitations and Areas of Disagreement

The biomechanical evidence base for proximal humeral implants is diverse and heterogeneous, with substantial variation in testing protocols across studies [biomechanical testing of proximal humerus fracture implants](https://pubmed.ncbi.nlm.nih.gov/26223275/). Most testing uses cadaver bone and two-part fracture patterns, which may not reflect the stability demands of comminuted fractures in live patients. Direct comparison of locking plates, intramedullary devices, and non-locking plates is therefore difficult, and implant choice continues to rest on surgeon preference and fracture configuration instead of on definitive comparative data.

Expert opinion differs on the role of adjunctive biologics. The evidence for vitamin D supplementation in fracture healing is mixed, with animal studies showing positive, neutral, and negative results, and the single randomised trial in humans limited by low participant numbers [vitamin D supplementation and fracture healing](https://pubmed.ncbi.nlm.nih.gov/23569676/). Some surgeons recommend routine vitamin D assessment in older patients with humeral fractures, while others reserve supplementation for confirmed deficiency. Both positions are defensible given the current evidence.

The use of growth factor technologies and barrier materials to reduce adhesions remains experimental in veterinary patients. A single case report describes successful healing of a nonhealing humerus fracture in a dog using an ultralow-dose BMP-2 coating [nanoscale coatings for ultralow dose BMP-2 driven bone regeneration](https://pubmed.ncbi.nlm.nih.gov/30693176/), but this does not establish a general treatment protocol. Similarly, adhesion barrier materials have shown promise in a rat model [rat traumatized shoulder model for the study of post-surgical adhesions](https://pubmed.ncbi.nlm.nih.gov/40585788/), yet no comparative clinical trial in dogs or cats supports their routine use.

## Referral and Escalation Criteria

Referral to a board-certified surgeon is appropriate when the fracture configuration exceeds the surgeon's experience, when previous fixation has failed, or when the patient has comorbidities that complicate anesthesia and recovery. Specialist consultation is also warranted for nonunion management, for revision of infected implants, and for fractures with substantial articular comminution where arthroplasty or salvage may be considered. The American College of Veterinary Surgeons provides specialist summaries of surgical conditions and expected outcomes that can guide the decision to refer [ACVS animal health resources](https://www.acvs.org/small-animal/).

Laboratory involvement is indicated when infection is suspected, when metabolic bone disease is considered, or when delayed healing raises the possibility of an underlying endocrinopathy. Serum calcium, phosphorus, and parathyroid hormone assessment is appropriate in patients with recurrent fractures or poor callus formation. Regulatory reporting is rarely required for humeral fracture surgery, but clinicians should be aware of their obligations regarding controlled substance use and post-operative adverse event reporting under their local veterinary board. International standards for animal health and welfare may apply in research or production settings [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/).

## Frequently Asked Questions

### How Do I Choose Between a Lateral and Medial Approach to the Elbow When Imaging Is Inconclusive?

When preoperative imaging leaves the location of pathology uncertain, begin with the lateral approach. The lateral compartment is the most common site of elbow disease in dogs, and the lateral approach provides access to the humeral condyle, radial head, and lateral coronoid process. If the lesion proves to be medial, extend the incision or close and reposition for a medial approach. A medial approach is preferred when pathology is confirmed or strongly suspected in the medial coronoid process, medial epicondyle, or when addressing medial collateral ligament injury. Intraoperative fluoroscopy, when available, reduces the need to convert between approaches. If neither approach yields adequate visualization, consider a trans-olecranon osteotomy for complete articular exposure.

### What Can I Do When Locking Plates Are Not Available for Humeral Fracture Repair?

Conventional non-locking plates remain a viable option when locking implants are unavailable. Use a plate long enough to engage at least three cortices proximal and distal to the fracture, and contour the plate precisely to the bone surface. Non-locking screws rely on plate-bone friction, so accurate contouring is critical. Apply the plate to the tension surface of the humerus where biomechanically feasible. Add a second plate at 90 degrees for comminuted or highly unstable fractures. External coaptation is rarely sufficient as primary stabilization for humeral fractures and should not substitute for internal fixation. Refer the case if fracture configuration exceeds your implant inventory or experience, as a poorly stabilized humeral fracture carries a high risk of nonunion.

### How Does the Surgical Approach Differ in Cats Compared with Dogs?

The same approaches are used in cats, but the smaller size of feline humeral and elbow anatomy demands scaled technique. The humerus is shorter and more curved, so plates must be contoured more aggressively and screw sizes reduced accordingly. The radial nerve follows a similar course but lies closer to the surgical field relative to bone size, increasing the risk of iatrogenic injury during diaphyseal approaches. The feline olecranon is smaller, making trans-olecranon osteotomy technically more demanding, consider a triceps-sparing approach for distal humeral fractures when possible. Postoperative activity restriction is equally important, as cats are less likely to comply with strict confinement. Feline bone heals more rapidly than canine bone, which can shorten the required fixation period.

### What Records Should I Maintain for Humeral and Elbow Surgical Procedures?

Document the preoperative imaging findings, including fracture classification and any concurrent elbow pathology. Record the surgical approach used, the reason for selecting it, and any difficulty encountered during exposure. Note the exact implant inventory placed, including plate type, length, screw sizes, and positions, using a postoperative radiograph as the definitive record. Describe soft tissue handling, nerve identification, and any intraoperative complications. Include the postoperative plan for analgesia, activity restriction, and scheduled recheck radiographs. [ACVS animal health resources](https://www.acvs.org/small-animal/) provide guidance on expected postoperative monitoring. Accurate records support continuity of care if the patient is referred or if a second surgery becomes necessary.

### How Should I Explain the Need for a Trans-Olecranon Approach to a Client?

Explain that the elbow joint sits deep beneath the triceps muscle and that a standard lateral approach may not provide enough visibility to reconstruct a complex distal humeral fracture. The trans-olecranon approach involves cutting through the olecranon process, the bony point of the elbow, to reflect the triceps and open the joint like a book. The bone is repaired at the end of the procedure with a pin and tension band or a plate. Recovery requires strict activity restriction for 6 to 8 weeks until the osteotomy heals. Most patients regain full limb use, though some permanent reduction in elbow extension range is possible. Refer clients to [MSD Veterinary Manual](https://www.msdvetmanual.com/) for general information on fracture repair and postoperative care.

### When Should I Stop Attempting Fracture Fixation and Refer the Case Instead?

Refer when the fracture configuration exceeds your implant inventory, when you lack intraoperative imaging, or when you have not performed the required approach recently. Distal humeral fractures involving both condyles, fractures with severe comminution, and fractures in very small or very large patients present particular challenges. If the radial nerve cannot be positively identified during a diaphyseal approach, close and refer before proceeding. Referral is also appropriate when the patient has concurrent orthopedic injuries that complicate positioning or when owner expectations exceed what you can reliably deliver. A well-timed referral produces better outcomes than a salvage procedure performed with inadequate resources. [AVMA practice resources](https://www.avma.org/resources-tools) can help identify board-certified surgeons in your region.

## Related Clinical & Scientific Guides

* [Perioperative Antibiotic Prophylaxis: Timing and Selection](/knowledge/veterinary-medicine/veterinary-surgery/perioperative-antibiotic-prophylaxis-timing-selection)
* [Surgical Approaches to the Femur and Stifle](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-femur-stifle)
* [Fracture Healing Assessment: Radiographic and Clinical Evaluation](/knowledge/veterinary-medicine/veterinary-surgery/fracture-healing-assessment-radiographic-clinical)


## References and Further Reading

- [Full-Thickness Rotator Cuff Tears Can Be Safely Treated With a Resorbable Bioinductive Bovine Collagen Implant: One-Year Results of a Prospective, Multicenter Registry.](https://pubmed.ncbi.nlm.nih.gov/34712984/). 2021.
- [A scoping review of biomechanical testing for proximal humerus fracture implants.](https://pubmed.ncbi.nlm.nih.gov/26223275/). 2015.
- [Is supplementation of vitamin d beneficial for fracture healing? A short review of the literature.](https://pubmed.ncbi.nlm.nih.gov/23569676/). 2011.
- [Animal-Assisted Therapy Reduces Patient Reported Pain During Office Pin Removal Following Supracondylar Humerus Fracture Fixation: A Randomized Controlled Study.](https://pubmed.ncbi.nlm.nih.gov/42281414/). 2026.
- [A rat traumatized shoulder model for the study of post-surgical adhesions.](https://pubmed.ncbi.nlm.nih.gov/40585788/). 2025.
- [Nanoscale Coatings for Ultralow Dose BMP-2-Driven Regeneration of Critical-Sized Bone Defects.](https://pubmed.ncbi.nlm.nih.gov/30693176/). 2019.
- [American College of Veterinary Surgeons Animal Health Resources](https://www.acvs.org/small-animal/). American College of Veterinary Surgeons.
- [MSD Veterinary Manual, Professional Edition](https://www.msdvetmanual.com/). MSD Veterinary Manual.
- [American Veterinary Medical Association Practice Resources](https://www.avma.org/resources-tools). American Veterinary Medical Association.

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- [Surgical Approaches to the Scapula and Shoulder](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-scapula-shoulder)
- [Surgical Approaches to the Mandible and Maxilla](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-mandible-maxilla)
- [Surgical Approaches to the Pelvis and Acetabulum](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-pelvis-acetabulum)
- [Surgical Approaches to the Long Bones: Radius and Tibia](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-long-bones-radius-tibia)

> This article is educational professional reference material for veterinary audiences. It is not a substitute for veterinary diagnosis, individual clinical judgment, current product labeling, or applicable regulatory requirements.