Cervical spine radiographs in patients with rheumatoid arthritis undergoing anesthesia

Preoperative Evaluation for Noncardiac Surgery

The previous In the Clinic that addressed preoperative evaluation for noncardiac surgery was published in December 2016. This update reaffirms much of the information in the previous version and provides new information that has accumulated since then. The goal of preoperative assessment is to identify the risk for postoperative complications so health care teams can more fully understand how to implement strategies to mitigate risks before and after the operation.

[Perioperative management of patients with rheumatoid arthritis]

Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint and systemic manifestations. As the prevalence in the adult population is approximately 1 %, anesthesia management in patients with RA has to be performed on a regular basis. Besides elective orthopedic surgery, e.g. surgery of the cervical spine, all other types of planned and emergency surgery should also be anticipated. Administering anesthesia to a patient with RA can be challenging not only due to a higher incidence of difficult intubation but also because of various organ manifestations as well as an elevated cardiovascular risk. Furthermore, possible complications should be considered in patients with chronic medication, particularly in patients treated with immunomodulating drugs. Therefore, a careful preoperative evaluation, preparation for possible difficult airway management and a selective anesthesia management in patients with RA can prevent possible complications.

Perioperative management of the patient with rheumatoid arthritis

A multidisciplinary approach is required to care for patients with rheumatoid arthritis (RA) in the perioperative period. In preparation for surgery, patients must have a cardiovascular risk assessment performed due to the high risk of heart disease in patients with RA. Treatment of RA is with immunomodulatory medications, which present unique challenges for the perioperative period. Currently, there is no consensus on how to manage disease modifying antirheumatic drug (DMARD) therapy in the perioperative setting. Much of the data to guide therapy is based on retrospective cohort data. Choices regarding DMARDs require an individualized approach with collaboration between surgeons and rheumatologists. Consensus regarding biologic therapy is to hold the therapy in the perioperative period with the length of time dictated by the half-life of the medication. Special attention is required at the time of surgery for potential need for stress dose steroids. Further, there must be close communication with anesthesiologists in terms of airway management particularly in light of the risk for cervical spine disease. There are no consensus guidelines regarding the requirement for cervical spine radiographs prior to surgery. However, history and exam alone cannot be relied upon to identify cervical spine disease. Patients with RA who undergo joint replacement arthroplasty are at higher risk for infection and dislocation compared to patients with osteoarthritis, necessitating particular vigilance in postoperative follow up. This review summarizes available evidence regarding perioperative management of patients with RA.

Quantitative Analysis of Cervical Flexion-Extension Radiographs in Rheumatoid Arthritis Patients

STUDY DESIGN

Diagnostic retrospective case series.

OBJECTIVE

To evaluate cervical intersegmental motion in rheumatoid arthritis patients using specialized tracking software (QMA) and compare the findings with a previously published cohort of "normal" subjects.

SUMMARY OF BACKGROUND DATA

Rheumatoid arthritis follows 3 patterns of cervical involvement, atlantoaxial subluxation, atlantoaxial impaction, and subaxial subluxation. Deformities present are sometimes considered "unstable" to the point where surgery can be recommended based on the interpretation of cervical radiographs.

METHODS

Cervical flexion-extension radiographs of 99 subjects with rheumatoid arthritis were evaluated. Angular and translational segmental motions were determined at each level using specialized tracking software. Findings were compared with previously published normative data using the same device.

RESULTS

Relative to controls, patients with rheumatoid arthritis demonstrated significantly less overall sagittal motion. Segmental analysis at C1-C2 demonstrated a 10% prevalence of dynamic motion outside the 95% confidence interval for "normal" patients. In contrast, segmental analysis at C2-C7 demonstrated no intersegmental motion outside the 95% confidence interval for "normal" subjects.

CONCLUSIONS

In patients with rheumatoid arthritis, abnormal motion at C1-C2 was consistent with truly dynamic deformity and should be closely evaluated. Conversely, subaxial subluxations, although frequently present, were relatively fixed deformities and in most cases, may not represent an unstable condition.

Beyond the joints: neurological involvement in rheumatoid arthritis

Although arthritis is the most notable component, rheumatoid arthritis (RA) is a systemic inflammatory disorder where extra-articular manifestations are common; among them, central and peripheral nervous system involvement is frequent and associated with significant morbidity and, in some cases, reduced life span. It may produce a myriad of symptoms and signs ranging from subtle numbness in a hand, to quadriparesis and sudden death. Central and peripheral neurologic manifestations may arise from structural damage produced by RA in diarthroidal joints, by the systemic inflammatory process of the disease itself or by the drugs used to treat it. Neurologic syndromes may appear suddenly or developed slowly through months, and emerge early or after years of having RA. Neurologic manifestations may be easily overlooked or incorrectly assigned to peripheral arthritis unless the attending physician is aware of these complications. In this article, we review neurologic involvement in RA patients with emphasis on clinical approach for early detection.