Respiratory perioperative management of patients with obstructive sleep apnea

Obstructive Sleep Apnea in Elective Spine Surgery: National Prevalence and Inpatient Outcomes

STUDY DESIGN

Retrospective cohort study.

OBJECTIVES

Epidemiologic studies suggest that the prevalence of moderate to severe obstructive sleep apnea (OSA) is increasing. OSA has been linked to increased rates of postoperative complications following surgery. Large studies, however, regarding surgical outcomes in this patient population, particularly in the spine literature, are limited. Consequently, the purpose of this study was to assess the prevalence of and postoperative risks conferred by OSA in the elective spine population.

METHODS

Using data from the National Inpatient Sample from 2008 to 2012, an estimated 56 372 (5.1%) patients with OSA undergoing elective cervical and thoracolumbar spine surgery were selected and compared to 1 052 837 patients without OSA undergoing the same procedures. Our primary outcome measures included postoperative complication rates, inpatient mortality, length of stay, and total hospital charges.

RESULTS

Patients with OSA were, on average 2.6 years older than those without OSA (P < .001) and had a higher comorbidity burden. The prevalence of OSA increased between 2008 and 2012 from 3.5% to 6.8%; P < .001. OSA was associated with a 3-fold increase in major complications (P < .001) and was confirmed as an independent risk factor for major complications based on multivariate analysis (odds ratio [OR] = 2.82; 95% CI = 2.59-2.79; P < .001). Rates of deep venous thrombosis were doubled in patients with OSA. OSA was determined to be an independent predictor of pulmonary complications (OR = 2.69; 95% CI = 2.59-2.79; P < .001). OSA did not increase the risk of postoperative mortality.

CONCLUSIONS

Patients with OSA often have multiple concomitant comorbidities and consequently are at increased risk of experiencing a more difficult postoperative course following elective spine surgery. Specifically, increased risks of pulmonary complications and deep venous thrombosis should be anticipated.

Perianesthesia Nurses' Survey of Their Knowledge and Practice With Obstructive Sleep Apnea

PURPOSE

Anesthesia, sedation, and analgesia can negatively impact adult patients with obstructive sleep apnea (OSA). Despite known risks, current evidence, and practice guidelines, insufficient evidence exists that standardization and clinical application of OSA screening tools, problem identification, and perioperative nursing intervention and management strategies are consistently implemented for OSA patients across perianesthesia settings. The purpose of this study was to conduct a knowledge and practice assessment of perianesthesia nurses who care for adult patients with diagnosed or undiagnosed OSA.

DESIGN

An anonymous descriptive study was used to survey perianesthesia nurses who care for adult patients with OSA who present for elective surgical procedures.

METHODS

A total of 1,222 participants completed an expert-developed 27-question online survey.

FINDINGS

The findings indicate the need for more education and research across all perianesthesia settings.

CONCLUSIONS

Next steps also include policy development and an interprofessional collaborative infrastructure nurses need to translate evidence-based screening and management strategies into their clinical practice.

Risk of Postoperative Complications in Patients with Obstructive Sleep Apnea following Skull Base Surgery

Objectives

Obstructive sleep apnea (OSA) presents several challenges in skull base surgery, including increased intracranial pressure, worsened OSA with nasal packing, and avoidance of positive airway pressure (PAP) therapy postoperatively. The objective of this study was to examine the risk of postoperative complications in a skull base population with OSA in which PAP therapy is withheld.

Study Design

Retrospective cohort study.

Setting

Tertiary care hospital.

Subjects and Methods

Medical records of 414 adult patients undergoing anterior skull base procedures between January 1, 2014, and January 7, 2017, were retrospectively reviewed. Revision surgeries, skull base infections, sinus surgery, and orbital cases were excluded.

Results

Fifty-four (13.0%) patients with a diagnosis of OSA were identified. While the known patients with OSA were more likely to require postoperative supplemental oxygen (odds ratio [OR], 4.29; 95% confidence interval [CI], 2.38-7.75; P < .001), there was no increased risk of serious respiratory events or cerebrospinal fluid leak (CSF). To address the likely underdiagnosis of OSA in this cohort, subgroup analyses were performed of patients at high risk for OSA (body mass index >30 kg/m2 and hypertension) and demonstrated an increased risk of serious respiratory events (OR, 4.41; 95% CI, 1.24-15.7; P = .034) and CSF leak (13.6% vs 4.7%; P = .018).

Conclusions

Skull base patients with known OSA can be successfully managed with diligent care in the perioperative period when PAP therapy is withheld. However, OSA is likely underdiagnosed in the skull base population, and patients at high risk for undiagnosed OSA may be at the greatest risk for respiratory complications and CSF leak. Increased presurgical awareness and implementation of a perioperative management algorithm is needed.

Novel therapies for perioperative respiratory complications

Postoperative respiratory complications are of paramount clinical importance as they prolong the hospitalization, increase the costs of treatment and contribute to the perioperative mortality. Obesity, preexisting pulmonary disease and advanced age are known risk factors for developing postoperative respiratory complications, which affect exceeding number of patients. Hereby, we present a review on the pathogenesis of post-operative respiratory complications particularly in obese and older patients. We further focus on the standard management and emerging therapies for the post-operative respiratory complications.

Manejo perioperatorio del paciente con síndrome de apnea-hipopnea obstructiva del sueño (SAHOS)

Los pacientes con diagnóstico de síndrome de apnea-hipopnea obstructiva del sueño (SAHOS) pueden ser llevados de forma segura a cualquier procedimiento quirúrgico, incluso de manera ambulatoria si tienen control adecuado de sus otras comorbilidades. El tratamiento con presión positiva continúa en vía aérea (CPAP) en pacientes con diagnóstico confirmado disminuye el riesgo de presentar complicaciones cardiovasculares a largo plazo. La sedación debe ser hecha por un anestesiólogo, quien, además, debe vigilar al paciente y disponer del equipo adecuado para atender complicaciones respiratorias emergentes. Se sugiere que, en estos pacientes, los procedimientos sean hechos en el ámbito hospitalario, donde se tenga disponibilidad en la unidad de cuidados post-anestésicos y personal para monitoreo por al menos una hora tras finalizar el procedimiento. El tratamiento con CPAP debe continuar según sea ordenado por el médico tratante. Es importante que desde la valoración preanestésica se identifique a los pacientes con riesgo de SAHOS para lograr trazar un plan anestésico que disminuya las complicaciones a nivel respiratorio y del manejo de la vía área.

Length of Stay in Ambulatory Surgical Oncology Patients at High Risk for Sleep Apnea as Predicted by STOP-BANG Questionnaire

Background. The STOP-BANG questionnaire has been used to identify surgical patients at risk for undiagnosed obstructive sleep apnea (OSA) by classifying patients as low risk (LR) if STOP-BANG score < 3 or high risk (HR) if STOP-BANG score ≥ 3. Few studies have examined whether postoperative complications are increased in HR patients and none have been described in oncologic patients. Objective. This retrospective study examined if HR patients experience increased complications evidenced by an increased length of stay (LOS) in the postanesthesia care unit (PACU). Methods. We retrospectively measured LOS and the frequency of oxygen desaturation (<93%) in cancer patients who were given the STOP-BANG questionnaire prior to cystoscopy for urologic disease in an ambulatory surgery center. Results. The majority of patients in our study were men (77.7%), over the age of 50 (90.1%), and had BMI < 30 kg/m² (88.4%). STOP-BANG results were obtained on 404 patients. Cumulative incidence of the time to discharge between HR and the LR groups was plotted. By 8 hours, LR patients showed a higher cumulative probability of being discharged early (80% versus 74%, P = 0.008). Conclusions. Urologic oncology patients at HR for OSA based on the STOP-BANG questionnaire were less likely to be discharged early from the PACU compared to LR patients.

Perioperative sleep apnea: a real problem or did we invent a new disease?

Depending on the subpopulation, obstructive sleep apnea (OSA) can affect more than 75% of surgical patients. An increasing body of evidence supports the association between OSA  and perioperative complications, but some data indicate important perioperative outcomes do not differ between patients with and without OSA. In this review we will provide an overview of the pathophysiology of sleep apnea and the risk factors for perioperative complications related to sleep apnea. We also discuss a clinical algorithm for the identification and management of OSA patients facing surgery.