Shoulder replacement complications

Ross A. Hauser, MD., Danielle R. Steilen-Matias, PA-C.

Many patients have excellent outcomes following shoulder replacement surgery. Some people do not have success and have resulting complications. This article will review some of the more recent research surrounding complications.

People have very successful shoulder replacements, some doctors suggest, however, shoulder replacement surgery may make things worse. How do you know who you are?

Some doctors suggest shoulder replacement surgery may make things worse

Complications from shoulder replacement surgery are a risk factor of the surgery. That is well understood and has concerned doctors for many years.  Back in 2015, researchers from Texas Orthopedic Hospital, the University of Houston, University of Texas, (1) noted great increases in the number of shoulder replacements being performed and that with more shoulder replacements being done, more shoulder replacement revision surgeries with be needed to address complications from the first surgery.

The paper concluded that shoulder replacement improved function in many patients, but with a high rate of complications and reoperations.

That was then. In 8 years since the same complication rates and concerns exist.

Shoulder replacement complications

The list of shoulder replacement complications – pain after shoulder replacement.

An October 2019 study (2) outlined to radiologists what they needed to look for in an MRI and x-rays of patients complaining of pain after shoulder replacement. The research came from the Angers University Hospital in France and was published in the European Society of Radiology’s journal Insights Into Imaging.

The authors noted: “Knowledge of (these) different types of shoulder (replacement implants) prostheses and their complications’ radiological signs are crucial for the radiologist to initiate prompt and adequate management.” In other words, the above provides a list to radiologists looking for the source of pain following a shoulder replacement.

Shoulder replacement works better for older patients…but complications, and painkiller use, are still a concern to surgeons

Here are the bullet points to recent medical studies:

People have failed shoulder surgeries and researchers say: “no adequate explanation in the literature” can provide a reasonable explanation why.

Now let’s look at a University of Copenhagen paper published in June 2022 (7). Here the study team found: “worse outcomes for patients with previous surgery for instability independent of age, sex, and arthroplasty (the type of shoulder surgery, whether it was shoulder resurfacing or shoulder replacement, reverse or traditional) type. The reason cannot be deduced from our study and there is no adequate explanation in the literature. Several factors could, in theory, have an adverse effect on the outcome for these patients. A long history of instability and previous surgery may lead to eccentric glenoid wear and subsequently a technically demanding operation with risk of persisting instability, subluxation of the humeral component, or loosening of the glenoid component.”

Soft tissue damage after shoulder replacement, a leading cause of surgery failure

In September 2019, a paper in the Clinics in Orthopedic Surgery (8) noted that “The majority of patients with shoulder instability after anatomic shoulder arthroplasty (replacement) have both soft tissue imbalance and component malposition. Rotator cuff (surgical) repair after shoulder replacement has also had a poor success rate. Additionally, revision surgery with anatomic components and soft tissue reconstruction has had a high failure rate. Consequently, both instability and symptomatic rotator cuff dysfunction after anatomic shoulder arthroplasty are preferably treated with revision to a reverse prosthesis.” In common terms, Reverse shoulder surgery.

Obesity is a complication concern in shoulder replacement

Doctors from the Mayo Clinic writing in the Journal of Bone and Joint Surgery discuss the problems of obesity caused in patients after shoulder replacement surgery.

Here is what they said:

Malnutrition, obesity, and anemia

A January 2022 study published in the Journal of Shoulder and Elbow Surgery (11) added to this by suggesting: “Malnutrition, obesity, and anemia contribute to significantly higher costs after shoulder arthroplasty. Medical strategies to optimize patients before shoulder arthroplasty are warranted to reduce total 90-day encounter charges, length of stay, and risk of readmission within 90 days of surgery. Optimizing patient health before shoulder surgery will positively impact outcomes and cost containment for patients, institutions, and payors after shoulder arthroplasty.”

Obese patients do get benefits

Another January 2022 study published in the Journal of Shoulder and Elbow Surgery (12) suggested:Both non-obese and obese patients can expect clinically significant improvements in pain, motion, and functional outcome scores following (shoulder and reverse shoulder replacement). Obese patients reported significantly more postoperative pain, lower outcome scores, and less ROM compared with non-obese patients after both (shoulder and reverse shoulder replacement) at an average follow-up of 5 years.”

Understanding the reverse total shoulder replacement and conventional shoulder replacement surgery.

When conventional total shoulder replacement is judged not to be effective, a reverse total shoulder replacement may be suggested as an option.

The procedure sounds exactly as it is named. In a traditional shoulder replacement,  a plastic “cup” is fitted into the shoulder socket (glenoid), and a metal “ball” is attached to the top of the upper arm bone (humerus). In a reverse total shoulder replacement, the socket and metal ball are switched.

The benefits of the reverse procedure are studied in a paper published in the medical journal Orthopedics. (13)

Postoperative outcomes are disappointing, and the complication rate is high

Another study from Dr. Pascal Boileau of the Department of Orthopedic and Sports Surgery Pasteur 2 Hospital, University Institute of Locomotion and Sports in France examined outcomes and complications in young patients undergoing revision reverse total shoulder arthroplasty (RTSA) for failed prior total shoulder arthroplasty or ball replacement and compared them with those of older patients undergoing the same procedure.

German orthopedic surgeons noted in their January 2023 paper (15) that “current data show a mean complication rate for reverse shoulder replacement of around 4%. The most common complications are instability, infection, component loosening, and periprosthetic fracture. . . Also, “Revision surgery for reverse shoulder replacement is challenging, and an individual treatment plan is necessary.”

Complications leading to re-operation are often multiple and underestimated

Back to the study from Dr. Boileau: The most common causes of revision surgery after reverse total shoulder arthroplasty (RTSA) are:

Complication challenges some patients face after reverse shoulder replacement

A March 2021 paper in the journal Clinics in Shoulder and Elbow (16)  lists the complication challenges some patients face after reverse shoulder replacement. Here is what these researchers wrote:

“Reverse shoulder arthroplasty is an ideal treatment for glenohumeral dysfunction due to cuff tear arthropathy (degenerative disease). As the number of patients treated with reverse shoulder arthroplasty is increasing, the incidence of complications after this procedure also is increasing.

The rate of complications in reverse shoulder arthroplasty was reported to be 15%-24%.

Recently, the following complications have been reported in order of frequency:

However, the overall complication rate has varied across studies because of different prostheses used, improvement of implant and surgical skills, and different definitions of complications.”

Overuse or “radical use of reverse total shoulder replacement in patients without rotator cuff deficiency may cause more harm than good.

When considering a shoulder replacement, many people are given the choice or are suggested one or another type of shoulder replacement. An August 2022 study in the journal Medicine (17),

“Reverse total shoulder replacement, which was originally designed mainly for irreparable rotator cuff damage, has gained popularity in recent years for the treatment of advanced shoulder osteoarthritis instead of the clinically standard total shoulder replacement. However, this Reverse total shoulder replacement has some nonnegligible flaws such as higher complication rates and economic cost (this means that the patient required much more medical services), not to mention the following problems caused by irreversible physical structural damage. Therefore, the employment of reverse total shoulder replacement needs to be carefully considered.”

What the researchers did in this study was to compare reverse total shoulder replacement with standard total shoulder replacement in osteoarthritis patients with or without rotator cuff damage. The focus being on rotator cuff damage and recommendations that could help surgeons in their clinical decision-making process.

What the researchers noted was that they believed the overuse of “radical use of reverse total shoulder replacement in patients without rotator cuff deficiency may cause more harm than good. The researchers then assessed the medical records of 57,156 shoulder replacement patients. Patients were divided into 2 groups according to the presence of rotator cuff deficiency.

Why was the patient sent to a revision shoulder replacement? What were the revision surgery complication rates?

An August 2021 study comes to us from the Brighton and Sussex Medical School and the University Hospitals Sussex and Dorset in the United Kingdom. It was published in the journal Bone & joint open. (18)

The researchers of this paper told their fellow physicians that “it is important to understand the rate of complications associated with the increasing burden of revision shoulder arthroplasty (replacement). Currently, this has not been well quantified. This review aims to address that deficiency (lack of understanding of what is causing the complications and what can realistically be done about it) with a focus on complication and reoperation rates, shoulder outcome scores, and comparison of anatomical and reverse prostheses (should you get the anatomically correct shoulder replacement of the reverse shoulder replacement) when used in revision surgery.”

Why was the patient sent to a revision shoulder replacement? According to the researchers, the indications for revision include:

The complications after the revision shoulder replacement were recorded as:

The researchers then left us with these take-home messages:

The realistic assessment of revision total shoulder replacement. The revision surgery is a high risk, if it works out the patient is better off. If it does not work out?

A June 2020 study in the journal Current Reviews in Musculoskeletal Medicine (19) offers a surgeon’s eye view of the realistic outcomes following failed shoulder surgery:

Despite relatively high complication and reoperation rates with revision shoulder replacement, revision of failed hemiarthroplasty or total shoulder arthroplasty to reverse total shoulder arthroplasty improves outcomes for many patients. A failed hemiarthroplasty or total shoulder arthroplasty is frequently disabling for the patient and because the surgical revision options are often limited only to reverse total shoulder arthroplasty, the potential improvement is often worth the higher surgical complication or reoperation rate.”

The revision surgery is a high risk, if it works out the patient is better off. If it does not work out?

A June 2019 study in the Journal of Shoulder and Elbow Surgery (20) found good results for the revision surgery. The learning points of this study were:

It is the last group of people that we usually see in our office looking for non-surgical help.

Treatment after you had shoulder replacement

In this section, we will address how we may be able to help a patient after they had shoulder replacement surgery. It makes our job here at Caring Medical a little more difficult when treating a patient who has had an extensive procedure, but it is still possible to achieve healing after surgery.

Exercise and physical therapy after reverse shoulder replacement

A January 2023 paper (21) in the Journal of shoulder and elbow surgery compared range of motion (ROM) and patient-reported outcomes (PROs) between a structured home exercise program (HEP) and active, supervised physiotherapy (PT) after primary Reverse Total Shoulder Arthroplasty. 89 patients were randomized, 43 to PT, and 46 to the home exercise program (HEP).

Patients undergoing primary Reverse Total Shoulder Arthroplasty at two medical centers were randomized to either a home exercise program group (46 patients), in which they were given a handout and a rope pulley, or a supervised physiotherapy group (43 patients), in which they were given a standardized program.

We see many patients following failed surgery or failed physical therapy. Not every treatment will work for every patient. Some people will experience great surgical results, some will not. Some people will experience great physical therapy results, some will not. Our own treatments offered here at our center show patients who experienced outstanding outcomes, some people had good outcomes, and some people had poor outcomes. Why there are many factors to treatment success and failure.

In this video, Danielle R. Steilen-Matias, MMS, PA-C discusses treating nerve pain following shoulder surgery.

It is not uncommon for us to see patients after shoulder surgery who continue to have shoulder instability issues. Other times we will see patients after shoulder surgery who have continued pain. It may be the same pain that they had before surgery or it may be a different type of pain. What we find in many of these people is that even though healing is occurring and the shoulder looks well, the pain they are having is related to the nerves that may have been impacted during the surgery. We treat these patients with Nerve release injection therapy or more commonly hydrodissection.

Nerve Release & Regeneration Injection Therapy

NRRIT is a nerve hydrodissection technique that is highly successful in releasing peripheral nerve entrapments. It is a quick, straightforward process injection procedure often providing instant relief results for the patient! In the procedure, the practitioner uses ultrasound guidance to identify the nerves being entrapped. Next, simple dextrose is injected around the nerve to nourish the nerve and mechanically release it from the surrounding tissue, fascia, or adjacent structures.

What are we seeing in this image?

Nerve Release Injection Therapy (hydrodissection) of an entrapped nerve. In this image, a 5% dextrose solution is injected around the nerve which releases or separates it from the surrounding tissue. The nerve, which is the central circular object has a dark ring forming around it, as seen strongly in the B image. That is the dextrose solution from the needle, the straight image from the right of the screen. The nerve as seen in B is now surrounded by the nerve-release fluid and therefore “released.”

 

Nerve Release Injection Therapy (hydrodissection) of an entrapped nerve. In this image dextrose solution is injected around the nerve which releases or separates it from the surrounding tissue. The nerve, which is the central circular object has a dark ring forming around it, as seen strongly in the B image. That is the dextrose solution from the needle, the straight image from the right of the screen. The nerve as seen in B is now surrounded by the nerve release fluid and therefore "released."

References

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This article was updated February 10, 2023

 

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