Failure Rates During Reuse of Disposable N95 Masks in Clinical Practice in the Emergency Department.

INTRODUCTION: The coronavirus 2019 pandemic caused a shortage of disposable N95 respirators, prompting healthcare entities to extend the use of these masks beyond their intended single-use manufacturer recommendation with a paucity of supporting research. METHODS: We performed a prospective cohort study of ED healthcare workers (HCW) ("subjects") required to use respirators at an academic, Level I trauma center. Subjects had been previously fit tested and assigned an appropriately sized N95 mask per hospital protocol. Per study protocol, subjects were fit tested periodically throughout their shifts and on multiple shifts over the eight-week study period. Data points collected included the age of the mask, subjective assessment of mask seal quality, and fit test results. We analyzed the data using Fisher's exact test, and calculated odds ratios (OR) to determine the failure rate of disposable N95 masks following reuse. RESULTS: A total of 130 HCWs underwent fit testing and 127 were included for analysis. Mask failure rate climbed after day 2 of use, with 33.3% of masks failing at day 3, 42.9% at day 4, and 50% at ≥ day 5. Categorizing the masks into those being used for two or fewer days vs those in use for three or more, failure was more common on day 3 of use or older compared to those in the first two days of use (41.8% vs 8.3%, P < 0.0001) with an OR of failure with an older mask of 7.9 (confidence interval [CI], 2.8-22.3). The healthcare workers' assessment of poor seal was 33.3% sensitive (CI, 18.6-51.9) and 95.7% specific (CI, 88.8-98.6) for fit test failure. CONCLUSION: Disposable N95 masks have significant failure rates following reuse in clinical practice. Healthcare personnel also performed poorly in assessing the integrity of the seal of their disposable respirators.

Prospective Validation of Modified NEXUS Cervical Spine Injury Criteria in Low-risk Elderly Fall Patients.

INTRODUCTION: The National Emergency X-radiography Utilization Study (NEXUS) criteria are used extensively in emergency departments to rule out C-spine injuries (CSI) in the general population. Although the NEXUS validation set included 2,943 elderly patients, multiple case reports and the Canadian C-Spine Rules question the validity of applying NEXUS to geriatric populations. The objective of this study was to validate a modified NEXUS criteria in a low-risk elderly fall population with two changes: a modified definition for distracting injury and the definition of normal mentation. METHODS: This is a prospective, observational cohort study of geriatric fall patients who presented to a Level I trauma center and were not triaged to the trauma bay. Providers enrolled non-intoxicated patients at baseline mental status with no lateralizing neurologic deficits. They recorded midline neck tenderness, signs of trauma, and presence of other distracting injury. RESULTS: We enrolled 800 patients. One patient fall event was excluded due to duplicate enrollment, and four were lost to follow up, leaving 795 for analysis. Average age was 83.6 (range 65-101). The numbers in parenthesis after the negative predictive value represent confidence interval. There were 11 (1.4%) cervical spine injuries. One hundred seventeen patients had midline tenderness and seven of these had CSI; 366 patients had signs of trauma to the face/neck, and 10 of these patients had CSI. Using signs of trauma to the head/neck as the only distracting injury and baseline mental status as normal alertness, the modified NEXUS criteria was 100% sensitive (CI [67.9-100]) with a negative predictive value of 100 (98.7-100). CONCLUSION: Our study suggests that a modified NEXUS criteria can be safely applied to low-risk elderly falls.

Delayed presentation of deep sternal wound infection.

Deep sternal wound infections (DSWI) are infections of the sternum, mediastinum, or the muscle, fascia and soft tissue that overlie the sternum, typically occurring within a month of cardiac surgery. They are infrequent though severe complications of cardiac surgery. Diagnosis is made by the clinical presentation of fever, chest pain, or sternal instability in the setting of wound drainage, positive wound cultures, or chest radiographic findings. We describe the case of an elderly man presenting 6 months after cardiac surgery with DSWI. Due to the atypical nature of such a late presentation, definitive therapy was delayed. Given a severely ill patient with multiple risk factors for poor wound healing, the clinician must maintain a high index of suspicion for DSWI despite a delayed presentation.

Physician assistants contribution to emergency department productivity.

INTRODUCTION: The objective of this report is to determine physician assistant (PA) productivity in an academic emergency department (ED) and to determine whether shift length or department census impact productivity. METHODS: A retrospective chart review was conducted at a tertiary ED during June and July of 2007. Productivity was calculated as the mean number of patients seen each hour. Analysis of variance was used to compare the productivity of different length shifts, and linear regression analysis was used to assess the relationship between productivity and department volume. RESULTS: One hundred sixty PA shifts were included. Shifts ranged from 4 to 13 hours. Mean productivity was 1.16 patients per hour (95% confidence interval [CI] = 1.12-1.20). Physician assistants generated a mean of 2.35 relative value units (RVU) per hour (95% CI = 1.98-2.72). There was no difference in productivity on different shift lengths (P = 0.73). There was no correlation between departmental census and productivity, with an R(2) (statistical term for the coefficient of determination) of 0.01. CONCLUSION: In the ED, PAs saw 1.16 patients and generated 2.35 RVUs per hour. The length of the shift did not affect productivity. Productivity did not fluctuate significantly with changing departmental volume.

Punch injuries: insights into intentional closed fist injuries.

OBJECTIVES: This study sought to investigate the patterns of injury resulting from a punch mechanism and to investigate the associated psychopathology present in patients with these injuries. METHODS: Retrospective analysis of patients with hand radiographs ordered from the emergency department allowed for identification of patients with a punch mechanism. We recorded injury patterns and queried patients' medical records for associated psychopathology. RESULTS: 1,292 patients underwent hand radiographs during a one-year time period; 172 patients (13%) were radiographed following an intentional punch injury, identifying 76 fractures in 70 patients. Males contributed a greater proportion of patients presenting with punch injury when compared to females (80% vs. 20%). Males were more likely to sustain fracture from a punch mechanism (48% vs. 11%, OR 7 [95% CI 2.3-20.9]), but were less likely to have preexisting documented psychiatric disease (23% vs. 49%, OR 3.1 [95% CI 1.4-6.7]). Of all fractures, 61% were to the fifth metacarpal, 21% were to the remainder of the metacarpals, and the remaining were fractures to phalanges and bones of the wrist. CONCLUSION: Women are less likely to present with punch injury and are less likely to sustain a fracture when they do present but have more associated psychiatric disease. Both men and women presenting with punch injuries have a higher prevalence of psychiatric disease than the background incidence in the population as a whole. Although punch injuries result in a significant number of boxer fractures, a number of other injuries are associated with punch mechanisms.

Extra-adrenal Pheochromocytoma in an Adolescent.

A 17-year-old male with symptoms of headache and diaphoresis presented to the emergency department. He had eight months of noted hypertension attributed to medications. On arrival his blood pressure was 229/117mmHg, and he was ill-appearing. His blood pressure was managed aggressively, and he was diagnosed with extra-adrenal pheochromocytoma by computed tomography. He eventually underwent resection of the mass. Children with severe, symptomatic hypertension should be evaluated for pheochromocytoma. Although rare, it is curable. Failure to diagnose carries a high risk of morbidity and mortality.

Dedicated Shift Wrap-up Time Does Not Improve Resident Sign-out Volume or Efficiency.

OBJECTIVES: Sign-out (SO) is a challenge to the emergency physician. Some training programs have instituted overlapping 9-hour shifts. The residents see patients for eight hours, and have one hour of wrap-up time. This hour helps them complete patient care, leaving fewer patients to sign-out. We examined whether this strategy impacts SO burden. METHODS: This is a retrospective review of patients evaluated by emergency medicine (EM) residents working 9-hour (eight hours of patient care, one hour wrap-up time) and 12-hour shifts (12 hours patient care, no reserved time for wrap-up). Data were collected by reviewing the clinical tracker. A patient was assigned to the resident who initiated care and dictated the chart. SO was defined as any patient in the ED without disposition at change of shift. Patient turn-around-time (TAT) was also recorded. RESULTS: One-hundred sixty-one postgraduate-year-one resident (PGY1), 264 postgraduate-year-two resident (PGY2), and 193 postgraduate-year-three resident (PGY3) shifts were included. PGY1s signed out 1.9 patients per 12-hour shift. PGY2s signed out 2.3 patients on 12-hour shifts and 1.8 patients on 9-hour shifts. PGY3s signed out 2.1 patients on 12-hour shifts and 2.0 patients on 9-hour shifts. When we controlled for patients seen per hour, SO burden was constant by class regardless of shift length, with PGY2s signing out 18% of patients seen compared to 15% for PGY3s. PGY1s signed out 18% of patients seen. TAT for patients seen by PGY1s and PGY2s was similar, at 189 and 187 minutes, respectively. TAT for patients seen by PGY3s was significantly less at 175 minutes. CONCLUSION: The additional hour devoted to wrapping up patients in the ED had no affect on SO burden. The SO burden represented a fixed percentage of the total number of patients seen by the residents. PGY3s sign-out a smaller percentage of patients seen compared to other classes, and have faster TATs.

Serotonin syndrome in a patient taking Lexapro and Flexeril: a case report.

The serotonin syndrome is a rare toxicological emergency increasingly seen in emergency practice, secondary to increased use of proserotinergic drugs. In this case report, the condition is described in a patient taking the selective serotonin reuptake inhibitor Lexapro and the muscle-relaxant Flexeril. Based on this case, Cyclobenzaprine should be considered on the growing list of medications that can precipitate the serotonin syndrome. With the increasing prevalence of proserotinergic polypharmacy, this uncommon toxidrome should be considered by the alert emergency medicine physician.