Cervical spine surgeons frequently manage patients with degenerative disc disease using both interventional therapies and surgery. In modern clinical practice, cervical disc replacement offers an effective motion-preserving alternative to traditional arthrodesis. However, clinicians often utilize interventional epidural steroid injections to relieve severe radicular compression before attempting surgical reconstruction. While conservative protocols can provide temporary pain relief, their biological effects on subsequent surgical outcomes require careful evaluation. Recent multicenter data demonstrate that receiving an epidural injection within 90 days prior to arthroplasty significantly elevates postoperative complications. Consequently, surgical teams must examine procedural timing more rigorously to protect patients from adverse clinical events.

Preoperative Injections and Cervical Disc Replacement Outcomes

Spine surgeons rely on nonoperative interventions to delay or avoid invasive surgery. Consequently, interventional pain physicians administer epidural steroid injections to alleviate severe cervical radicular pain. Multiple prior investigations linked preoperative epidural steroid injections to elevated complication rates following anterior cervical discectomy and fusion. Nevertheless, few studies evaluated whether similar risks occur when surgeons preserve motion with cervical disc replacement. To answer this crucial question, investigators analyzed the national PearlDiver database between 2010 and 2022. They identified patients undergoing arthroplasty and categorized them based on injection timing. Specifically, researchers compared patients who received injections within 90 days before surgery against untreated controls. Furthermore, investigators applied robust propensity-score matching to eliminate baseline confounders, including age, tobacco use, and medical comorbidities. Ultimately, the retrospective findings confirmed that recent steroid exposure correlates directly with adverse surgical outcomes. Therefore, physicians must carefully weigh the immediate benefits of interventional injections against potential long-term reconstructive risks.

Postoperative Complications and Radiculopathy Recurrence

The database analysis demonstrated a striking increase in short-term morbidity among patients receiving preoperative injections. Most notably, these individuals suffered from significantly higher rates of postoperative urinary tract infections compared to control subjects. Specifically, infected patients comprised 3.2 percent of the injection cohort versus only 1.6 percent of the control group. This twofold elevation in infection incidence demonstrates the persistent immunosuppressive reach of exogenous corticosteroids. Even more strikingly, patients in the injection group experienced severe rates of recurrent radiculopathy. Over 63 percent of injection recipients reported recurrent radicular symptoms within 90 days after surgery, whereas only 16.1 percent of controls encountered similar problems. Consequently, the odds of suffering persistent nerve irritation rose more than ninefold among pretreated patients. This substantial discrepancy suggests that lingering local chemical inflammation or altered perineural mechanics hinder normal postoperative nerve recovery. Thus, recent injections appear to destabilize neurological healing following motion-preserving arthroplasty.

Escalated Healthcare Utilization and Surgical Reoperations

In addition to specific biological complications, recent preoperative steroid exposure drove a noticeable rise in secondary healthcare utilization. Within 30 days after disc replacement, patients with previous injections visited emergency departments significantly more frequently than unexposed individuals, recording rates of 6.2 percent versus 4.8 percent. Furthermore, 30-day hospital readmission rates more than doubled in the injection group, reaching 2.8 percent compared to 1.1 percent in controls. By 90 days postoperatively, this divergence broadened remarkably. Total readmissions climbed to 9.7 percent among pretreated patients, whereas only 2.0 percent of control patients required hospital readmission. Most alarmingly, long-term tracking confirmed that these initial setbacks translated into permanent surgical failures. Over a two-year surveillance window, patients receiving an injection within 90 days required revision surgery at a rate of 7.8 percent, compared to 2.4 percent among controls. Prior injection exposure tripled the odds of needing a secondary surgical reconstruction. Therefore, failing to account for injection timing imposes severe clinical and financial burdens across health systems.

Biological Mechanisms of Corticosteroid Tissue Impairment

Several interrelated biological mechanisms explain why corticosteroid injections undermine subsequent cervical arthroplasty outcomes. Synthetic corticosteroids deliver potent anti-inflammatory properties, but they simultaneously inhibit fibroblast proliferation, diminish microvascular perfusion, and suppress localized collagen formation. When an artificial disc prosthesis is inserted into the cervical intervertebral space, the surrounding vertebral endplates require intact cellular biology to stabilize the implant. However, lingering corticosteroid deposits impede endplate healing and blunt normal osseointegration. Additionally, localized immunosuppression diminishes phagocytic activity, leaving surgical tissue beds vulnerable to opportunistic bacterial colonization. This localized deficit explains why pretreated patients exhibit higher infection rates despite standard prophylactic antimicrobial regimens. Furthermore, needle instrumentation through the epidural space often produces microtrauma, localized dural scarring, and fibrous perineural adhesions. Consequently, these structural alterations complicate surgical dissection and compromise neural decompression during the anterior approach. In summary, residual depot corticosteroids alter paraspinal tissue integrity and interfere with primary healing, increasing overall susceptibility to hardware loosening and chronic neural irritation.

Clinical Practice Recommendations for Indian Spine Specialists

In Indian healthcare settings, clinicians frequently encounter patients who received multiple spine injections across outpatient pain clinics before consulting a surgeon. Because patient records remain fragmented across private practices, surgeons must proactively investigate the exact timeline of prior interventional procedures. Whenever clinical history reveals an epidural steroid injection within the preceding 90 days, surgeons should consider delaying elective disc arthroplasty. Enforcing an adequate washout interval permits local vascularity to normalize and restores endogenous tissue defenses. Furthermore, spine specialists must counsel prospective surgical candidates regarding the elevated risks of persistent radiculopathy and revision surgery. In urgent scenarios featuring acute neurological deterioration or rapidly evolving myelopathy, prompt surgical decompression remains non-negotiable regardless of injection history. Conversely, for stable patients undergoing elective motion preservation, postponing intervention optimizes tissue healing and protects surgical durability. Multidisciplinary collaboration between interventional radiologists, anesthesiologists, and spine surgeons establishes coordinated treatment plans that safeguard patient health.

Frequently Asked Questions

Why does an epidural injection increase revision rates after disc surgery?

Preoperative steroid injections can impair local vascularization, suppress immune cell recruitment, and weaken healing around spinal endplates. Consequently, persistent tissue inflammation and poor implant seating increase biomechanical failure rates. These disruptive tissue changes elevate the likelihood of recurrent radicular compression, ultimately tripling the risk of secondary revision surgery within two years.

How long should patients wait between an epidural injection and surgery?

Clinical registry data suggest that physicians should ideally enforce a waiting window of at least 90 days between an epidural steroid injection and cervical disc replacement. This conservative delay facilitates drug clearance, restores normal paraspinal tissue vascularity, and lowers systemic infection susceptibility, thereby protecting patients from preventable post-surgical complications.

Can an epidural injection cause post-surgical urinary tract infections?

Exogenous corticosteroids exert subtle systemic immunosuppressive effects that persist well beyond initial local administration. When patients undergo major spine surgery under general anesthesia with urinary catheterization, residual steroid-induced immune suppression doubles the likelihood of developing postoperative urinary tract infections, necessitating vigilant perioperative surveillance and prompt antibiotic management.

Disclaimer: This content is for informational and educational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.

References

1. Hameed Z et al. Do Preoperative Epidural Steroid Injections Increase the Risk of Postoperative Complications Following Cervical Disc Replacement? Spine (Phila Pa 1976). 2026 Apr 15. doi: 10.1097/BRS.0000000000005376. PMID: 40272203.
2. Seavey BM, Balmaceno-Criss M, Curley KL, et al. Preoperative Cervical Epidural Injections Increase the Risk of Complications After Anterior Cervical Discectomy and Fusion. Spine (Phila Pa 1976). 2022;47(24):1715-1721.
3. Radcliff K, Coric D, Albert T. Five-year clinical results of cervical total disc replacement compared with anterior cervical discectomy and fusion for treatment of 2-level symptomatic cervical disc disease. J Neurosurg Spine. 2016;25(2):213-224.