Goat Chest Model Trains Thousands of Doctors to Insert Chest Tubes Safely

In the emergency departments and trauma bays of the world, few procedures carry as much immediate life-saving weight as tube thoracostomy, the insertion of a chest tube to drain air or blood from the pleural space around the lungs. When a patient arrives with a collapsed lung from a stabbing, a car crash, or a spontaneous pneumothorax, a clinician who can place the tube quickly and correctly may save a life within minutes. Yet the procedure is technically demanding, involving incision through skin, blunt dissection through intercostal muscle, and careful passage of a tube into the chest cavity, all while avoiding injury to the lung, liver, spleen, or the neurovascular bundle that runs beneath each rib. A study published in Global Surgical Education, the journal of the Association for Surgical Education, now reports the results of an extraordinary nineteen-year effort to train thousands of doctors in this skill using an unlikely and inexpensive tool: the freshly sacrificed cadaveric goat.

The research, conducted by thoracic surgeons Muhammad Shoaib Nabi and Zeeshan Sarwar of the Department of Thoracic Surgery at Services Institute of Medical Sciences in Lahore, Pakistan, describes a prospective, single-arm educational study carried out between 2006 and 2025 across multiple hospitals in Punjab province. In total, 4,045 participants took part, ranging from medical interns and surgical residents to consultant faculty members. Each attended a structured workshop that combined didactic lectures on the anatomy and physiology of the chest, live demonstrations of correct technique, and supervised hands-on practice inserting chest tubes into the goat chest model. The scale of the program is remarkable for any simulation study, and its duration, spanning nearly two decades, makes it one of the longest-running procedural training initiatives of its kind reported in the surgical education literature.

The choice of a goat chest was not arbitrary. High-fidelity commercial simulators for tube thoracostomy exist, but they are expensive, often costing thousands of dollars, and are rarely available in the hospitals of low- and middle-income countries where the burden of chest trauma is high and training resources are scarce. A cadaveric goat chest, obtained from animals freshly sacrificed for other purposes, offers tissue with realistic resistance: skin that must be incised firmly, intercostal muscles that must be spread with a clamp, parietal pleura that gives way with a characteristic pop, and a pleural cavity deep enough to accept a chest tube. The authors report that participants, drawing on their prior experience with commercially available synthetic manikins in earlier training activities, rated the goat model as highly realistic by comparison. This tactile authenticity matters, because the feel of tissue planes is precisely what novice operators lack and what synthetic models often fail to reproduce.

The educational design of the workshops was straightforward but rigorous. Trainees completed pre-training assessments of knowledge and confidence before the session, then received lectures and demonstrations, and finally performed the procedure themselves under direct faculty supervision. Instructors used structured checklists to score each attempt and to document specific technical errors. After training, the same knowledge and confidence assessments were repeated, allowing the researchers to quantify change within each participant. Of the 4,045 trainees enrolled over the nineteen years, 3,155, or 78 percent, completed the follow-up assessment, a substantial retention rate for a program of this scale and duration.

The results were striking. Mean knowledge scores rose from 4.99 on a ten-point scale, with a standard deviation of 1.16, to 7.98, with a standard deviation of 1.57, a gain that was statistically significant at p less than 0.001. Self-rated confidence climbed even more dramatically, from a mean of 2.0 on a five-point scale to 4.5, again with p less than 0.001. These numbers tell a familiar story in simulation research, but the study goes further by documenting what trainees actually did wrong, and this error analysis is arguably the most valuable contribution of the paper. The most frequent technical error was incorrect site selection, seen in 18 percent of attempts, followed by inadequate dissection through the chest wall in 12 percent and tube misdirection within the pleural space in 10 percent.

These error patterns mirror exactly the complications that plague real-world chest tube insertion. Incorrect site selection risks injury to intra-abdominal organs or major vessels, and published studies have documented clinically significant malposition of chest tubes in a meaningful fraction of critically ill patients. Inadequate dissection means the operator may fail to enter the pleural space at all or may force the tube against unyielding tissue, while misdirection leaves the tube curled against the chest wall or fissure rather than draining the intended space. Under supervision, correct tube placement was achieved in 45 percent of attempts, a figure that may seem modest but reflects the genuine difficulty of the procedure for novices and underscores why repeated, realistic practice before touching a patient is so important. The checklist-based feedback allowed instructors to name each error specifically, converting a failed attempt into a targeted teaching moment.

The study sits within a broader and growing body of evidence on simulation-based procedural training. Previous work has compared synthetic task trainers, human cadavers, and live animal models for chest tube education, with some studies finding that simulator training is associated with faster and more successful real-world performance. Others have explored novel approaches, including biomaterial-covered mannequins, three-dimensional printed thorax models, and even app-based serious gaming as adjuncts to hands-on practice. A systematic review of cadaveric simulation in surgical training has highlighted the enduring value of real tissue for teaching operative skills. The Pakistani study adds an important data point for resource-limited settings, where the question is not which high-end model to buy but how to deliver realistic training at all. In that context, a goat chest costs a fraction of a commercial simulator, requires no specialized equipment beyond standard surgical instruments, and can be sourced locally.

The authors are candid about the framework within which such training must operate. The study protocol was reviewed and approved by the Institutional Review Board of Services Institute of Medical Sciences, Services Hospital, Lahore, under reference number IRB/2025/1668/SIMS, and the researchers declared no conflicts of interest, funding the work through their own efforts. The use of animal tissue in medical education raises ethical questions that institutions must weigh, but the practice of using tissue from animals already sacrificed for food or other purposes is well established in surgical training traditions worldwide, including military and trauma surgery courses that have long used live tissue and cadaveric models to teach emergency procedures. The nineteen-year continuity of the Lahore program suggests that the model found durable institutional acceptance.

What makes this study resonate beyond Pakistan is the global inequity it addresses. Trauma remains a leading cause of death and disability in young people across South Asia, Africa, and other regions where chest injuries from road traffic collisions and violence are common, yet formal hands-on training in chest tube insertion has historically been limited, with many clinicians learning the procedure for the first time on a living patient. Research on surgical resident training in Pakistan has previously identified simulation-based education as an underused resource, and studies of chest tube complications have asked pointedly how well residents are being trained at all. By demonstrating that a simple, affordable biological model can produce measurable gains in knowledge, confidence, and technical performance across more than four thousand trainees, the Lahore team offers a template that other institutions in similar settings can adopt without waiting for expensive equipment.

The findings also carry a humbling message for wealthy health systems. Even with structured teaching, demonstrations, and supervision, only 45 percent of novice attempts achieved correct tube placement, and errors clustered around the same technical pitfalls that injure patients in real emergencies. Simulation does not make a procedure easy; it makes failure safe. The Pakistani program shows that when the barrier of cost is removed, thousands of clinicians can be given the chance to fail, learn, and improve before their skills are needed at a bedside. As surgical education increasingly embraces virtual reality, artificial intelligence, and 3D printing, this nineteen-year experiment with a goat chest is a reminder that the most transformative training technology in a resource-limited hospital may be the one that costs almost nothing and feels exactly like the real thing.

Subject of Research: Simulation-based tube thoracostomy training using a cadaveric goat chest model

Article Title: Outcomes of tube thoracostomy training using a cadaveric goat chest model: a 19-year experience

Article References: Nabi, M. S., & Sarwar, Z. (2026). Outcomes of tube thoracostomy training using a cadaveric goat chest model: a 19-year experience. Global Surgical Education – Journal of the Association for Surgical Education, 5(1), Article 127. https://doi.org/10.1007/s44186-026-00532-4

Image Credits: AI Generated

DOI: 10.1007/s44186-026-00532-4

Keywords: tube thoracostomy, simulation-based training, goat cadaver model, surgical education, chest tube insertion, low-resource settings, thoracic surgery, procedural skills, Pakistan, medical simulation, trauma training, error analysis