Intestinal epithelial stem cell transplants as a novel therapy for cerebrovascular stroke.

Almost 2/3rds of stroke survivors exhibit vascular cognitive impairment and a third of stroke patients will develop dementia 1-3 years after stroke. These dire consequences underscore the need for effective stroke therapies. In addition to its damaging effects on the brain, stroke rapidly dysregulates the intestinal epithelium, resulting in elevated blood levels of inflammatory cytokines and toxic gut metabolites due to a 'leaky' gut. We tested whether repairing the gut via intestinal epithelial stem cell (IESC) transplants would also improve stroke recovery. Organoids containing IESCs derived from young rats transplanted into older rats after stroke were incorporated into the gut, restored stroke-induced gut dysmorphology and decreased gut permeability, and reduced circulating levels of endotoxin LPS and the inflammatory cytokine IL-17A. Remarkably, IESC transplants also improved stroke-induced acute (4d) sensory-motor disability and chronic (30d) cognitive-affective function. Moreover, IESCs from older animals displayed senescent features and were not therapeutic for stroke. These data underscore the gut as a critical therapeutic target for stroke and demonstrate the effectiveness of gut stem cell therapy.

Does insurance type influence overall survival in patients with laryngeal squamous cell carcinoma?

OBJECTIVE: Patients with head and neck cancer with Medicaid or no insurance present at a more advanced stage and have lower survival. This study is one of the first to examine the relationship between specific insurance types and overall survival for laryngeal squamous cell carcinoma patients. STUDY DESIGN: Retrospective chart review. SETTING: Henry Ford Cancer Institute. SUBJECTS AND METHODS: A retrospective database review was performed using the Henry Ford Virtual Data Warehouse Tumor Registry. Six hundred and fifty patients diagnosed with laryngeal squamous cell carcinoma were identified. Insurance groups analyzed were fee for service, health maintenance organization, Henry Ford Medical Group - a managed care type insurance, Medicare and Medicaid/uninsured. Cox proportional hazards and Kaplan-Meier curves were generated to analyze overall survival and display survival differences respectively. RESULTS: The uninsured group had the lowest median survival time of 29.8 months (95% CI: 20.3-44.8) and the highest HR of 1.85 (95% CI 1.16-2.93) as compared to the HMO group at p < 0.001. Patients with fee for service insurance had longer overall survival compared to the other insurance types. Patients with fee for service insurance also had a high proportion of patients with advanced stage disease, but a younger mean age. Henry Ford Medical Group had a higher mean age and no statistically significant difference in survival when compared to fee for service. (p = 0.999) After controlling for socioeconomic status, insurance type remains a significant predictor of overall survival. CONCLUSIONS: Fee for service had the highest overall survival of the different insurance types, but it was only statistically significant when compared to the Medicaid/uninsured group.

A faster parathyroidectomy: Techniques to shorten non-surgical operating room time.

OBJECTIVE: To assess the capacity of different techniques to reduce non-operative times during parathyroid surgery. The impact of monitored anesthesia care (MAC) instead of general anesthesia, and the pre-operative placement of a second peripheral intravenous catheter (PIV) were analyzed. METHODS: A retrospective case series at an academic medical center was performed to study patients undergoing parathyroidectomy by a single surgeon between November 2013 and October 2016. Three operating room (OR) time measurements were compared: pre-incision time, post-closure time, and total OR time. RESULTS: Surgeries performed under MAC (n = 21) had statistically shorter pre-incision (33.2 min vs. 39.7 min, p < .001), post-closure (10.1 min vs. 16.2 min, p = .002), and total operative times (113.0 min vs. 151.5 min, p < .001) compared to those in which general anesthesia (n = 169) was used. Of the 169 patients who underwent general anesthesia, 25 had a second PIV placed preoperatively and 144 had only a single PIV. All 3 time periods were statistically shorter in patients who had a second PIV versus those who had only a single PIV (pre-incision 32.2 min vs. 41.0 min, p < .001; post-closure 12.2 min vs. 16.9 min, p < .001; total 117.9 min vs. 157.4 min, p < .001). CONCLUSIONS: In patients undergoing parathyroid surgery in which ioPTH levels will be used, the placement of a second PIV in the pre-operative holding area and performance of surgery under MAC can significantly shorten non-operative and total OR time.

Evaluation of Noise Exposure Secondary to Wind Noise in Cyclists.

Objective Determine if the noise levels of wind exposure experienced by cyclists reach levels that could contribute to noise-induced hearing loss. Study Design Industrial lab research. Setting Industrial wind tunnel. Subjects and Methods A commercial-grade electric wind tunnel was used to simulate different speeds encountered by a cyclist. A single cyclist was used during the simulation for audiometric measurements. Microphones attached near the ears of the cyclist were used to measure the sound (dB sound pressure level) experienced by the cyclist. Loudness levels were measured with the head positioned at 15-degree increments from 0 degrees to 180 degrees relative to the oncoming wind at different speeds (10-60 mph). Results Wind noise ranged from 84.9 dB at 10 mph and increased proportionally with speed to a maximum of 120.3 dB at 60 mph. The maximum of 120.3 dB was measured at the downwind ear when the ear was 90 degrees away from the wind. Conclusions Wind noise experienced by a cyclist is proportional to the speed and the directionality of the wind current. Turbulent air flow patterns are observed that contribute to increased sound exposure in the downwind ear. Consideration of ear deflection equipment without compromising sound awareness for cyclists during prolonged rides is advised to avoid potential noise trauma. Future research is warranted and can include long-term studies including dosimetry measures of the sound and yearly pre- and postexposure audiograms of cyclists to detect if any hearing loss occurs with long-term cycling.