Rotator cuff surgery is not considered dangerous. It is one of the most commonly performed orthopedic procedures, with a surgical complication rate of roughly 8% in large databases, most of which are minor and treatable. The risk of dying from the procedure is essentially zero in the short term, and serious complications like blood clots or deep infections affect fewer than 1 in 100 patients.
That said, “not dangerous” doesn’t mean risk-free. Understanding what can go wrong, how likely each complication is, and what factors raise your personal risk can help you make a confident decision.
Overall Complication Rates
A review of the American Board of Orthopaedic Surgery database found that 7.9% of arthroscopic shoulder surgeries had a surgical complication, 2.2% had a medical complication (something affecting general health, like a blood clot), and 1.0% had an anesthesia-related complication. Those numbers sound higher than you might expect, but context matters. Most surgical complications are minor issues like stiffness, swelling, or superficial wound problems that resolve with time or simple treatment.
Only 0.8% of patients required a second trip to the operating room for a complication, and just 1.0% were readmitted to the hospital. A separate analysis using the National Surgical Quality Improvement Program database reported an even lower overall complication rate of about 1%. The gap between these numbers reflects differences in how complications are defined and reported, but both datasets confirm that serious problems are uncommon.
Infection Risk
Deep infection following rotator cuff repair occurs in 0.3% to 1.9% of cases, depending on the surgical approach. Arthroscopic repairs (done through small incisions with a camera) tend to sit at the lower end of that range. One large study reported an infection rate of 0.85%. Open or mini-open repairs, which involve larger incisions, carry a slightly higher risk.
Superficial infections around the incision site are more common but typically clear up with antibiotics. Deep infections are the ones surgeons worry about because they can require additional surgery, prolonged antibiotic treatment, and longer recovery. Diabetes and smoking both raise infection risk, which is one reason surgeons encourage patients to optimize their health before scheduling the procedure.
Blood Clots
Blood clots are a known risk with any surgery, but they’re relatively rare after shoulder procedures. In a study of over 2,300 shoulder surgeries, symptomatic deep vein thrombosis occurred in 0.26% of patients, and pulmonary embolism (a clot that travels to the lungs) occurred in 0.17%. The combined rate of any symptomatic clot was 0.43%. One fatal pulmonary embolism was recorded in that series, following a more complex shoulder replacement rather than a rotator cuff repair. Most clots that do occur respond well to blood-thinning medication.
The Nerve Block: A Temporary Side Effect
Most rotator cuff surgeries use a nerve block in the neck called an interscalene block to manage pain during and after the procedure. It works well for pain control, but it has a notable side effect: temporary paralysis of half the diaphragm. This happens because the nerve that controls the diaphragm runs right next to the nerves being targeted, and it gets numbed along with them. In traditional approaches, this occurs in nearly all patients.
For most people, losing half their diaphragm function for a few hours causes no noticeable problems. You breathe a little more shallowly, and it resolves as the block wears off. But if you have a lung condition like COPD or severe asthma, this temporary effect can feel significant. Newer techniques, including injections around the superior trunk of the nerve bundle or targeting different nerve branches entirely, reduce the incidence of diaphragm involvement while still providing good pain relief. If you have breathing concerns, bring them up before surgery so your anesthesia team can choose the safest approach.
Retear Rates: The Biggest Long-Term Risk
The most common “complication” isn’t really a surgical error. It’s the repaired tendon tearing again. Published retear rates range widely, from 13% to as high as 94%, depending on the size of the original tear, the patient’s age, tissue quality, and how aggressively they rehabilitate afterward. That enormous range reflects the fact that a small tear in a 45-year-old heals very differently than a massive tear in a 75-year-old.
Retears don’t always mean a failed outcome. Many patients with retears on imaging still report less pain and better function than before surgery. The tendon may partially heal or scar in a way that provides enough stability to improve daily life, even if an MRI shows the repair isn’t fully intact.
Imaging to check the repair is typically done around seven months after surgery. If a retear is found and symptoms are significant, revision surgery is an option, though it generally produces less predictable results than the first repair.
How Age Affects Your Risk
Age is one of the strongest predictors of how well the repair heals. Retear rates stay relatively stable until about age 65, then climb sharply after 70. A systematic review of patients over 70 found an average retear rate of about 22%, with one study reporting 25% in the 70-to-79 age group. A separate analysis put the rate at 32% for patients older than 70.
The reason isn’t just age itself. Older patients tend to have larger, more complete tears by the time they reach surgery, and the tendon tissue is often thinner and less capable of holding sutures. Despite higher retear rates, most studies still show meaningful pain relief and functional improvement in older patients, which is why surgery remains a reasonable option for active people over 70 who haven’t responded to physical therapy.
Smoking and Diabetes
Smoking at least one pack-year before surgery is associated with significantly worse repair outcomes, and this effect is compounded when combined with type 2 diabetes. A study of diabetic patients who underwent arthroscopic rotator cuff repair found that smokers in the group had measurably poorer results than non-smokers, even though neither subgroup experienced serious complications like infection or rehospitalization in the first three months.
The issue with smoking is twofold. Nicotine constricts blood vessels, reducing the oxygen supply that healing tendons need. It also impairs the body’s inflammatory response, which is essential for tissue repair in the early weeks. Diabetes adds to this by slowing wound healing and increasing infection susceptibility. If you smoke and are considering surgery, even a few weeks of cessation before the procedure can improve blood flow and healing potential.
Mortality Risk
For elective shoulder surgery, the 30-day mortality rate in one large study was 0%. At 90 days, it was 0.16%. These numbers come from shoulder arthroplasty (joint replacement) data, which involves a more invasive procedure than rotator cuff repair. Rotator cuff repair, being less complex, carries an even lower mortality risk. Elective patients had lower-than-expected mortality rates compared to the general population, likely because they were screened for fitness before surgery.
In practical terms, the chance of dying from a rotator cuff repair is vanishingly small. The anesthesia, the blood clot risk, and the stress of surgery all contribute a tiny amount of risk, but for a generally healthy person, this is among the safest surgeries you can undergo.