Objectives: Treatment of critical-sized bone defects with cells and biomaterials offers an efficient alternative to traditional bone grafts. Chitosan (CS) is a natural biopolymer that acts as a scaffold in bone tissue engineering (BTE). Polyphosphate (PolyP), recently identified as an inorganic polymer, acts as a potential bone morphogenetic material, whereas pigeonite (Pg) is a novel iron-containing ceramic. In this study, we prepared and characterized scaffolds containing CS, calcium polyphosphate (CaPP) and Pg particles for bone formation in vitro and in vivo.
We report a novel single neural probe for real-time simultaneous monitoring of multiple neurochemicals and direct-current electrocorticography (DC-ECoG). A major advance of this probe is the inclusion of two iridium oxide reference electrodes to improve sensor accuracy. The ECoG reference electrode is identical to the ECoG recording electrodes to significantly improve DC stability, while the reference for electrochemical sensors has 10-fold lower polarization rate to minimize the small current-induced drift in the reference electrode potential. In vitro, the single probe selectively measured oxygen (r(2)=0.985 ± 0.01, concentration range=0-60 mmHg, limit of detection=0.4 ± 0.07 mmHg) and glucose (r(2)=0.989 ± 0.009, concentration range=0-4mM, limit of detection=31 ± 8 µM) in a linear fashion. The performance of the single probe was assessed in an in vivo needle prick model to mimic sequelae of traumatic brain injury. It successfully monitored the theoretically expected transient brain oxygen, glucose, and DC potential changes during the passage of spreading depolarization (SD) waves. We envision that the developed probe can be used to decipher the cause-effect relationships between multiple variables of brain pathophysiology with the high temporal and spatial resolutions that it provides.
Tell Me More ® (TMM) is a medical student driven project that represents a movement amongst the rising generation of physicians to practice humanistic, patient-centered medicine through a collaborative approach. Students interviewed patients to create individualized posters designed to build rapport and trust between patients and clinicians, remind patients of their special strengths by highlighting their unique interests and qualities, and encourage more personal and compassionate patient-clinician interactions in order to enhance the patient experience. Students asked each patient three questions: 1. "How would your friends describe you?" 2. "What are your strengths?" 3. "What has been most meaningful to you?" and answers were recorded on a large poster, which was displayed prominently in the patient's room for clinicians and staff to acknowledge. TMM engaged 5 students and 302 patients over 4 hospital settings throughout Northwell Health. Data collection included daily written reflections by students on their experiences, exit interviews with patients to assess the impact of the project on their stay, and staff surveys that addressed provider perception of the program. Descriptive outcomes supported a positive impact on students, patients, staff and clinicians. TMM succeeded in providing a bridge between patients and clinicians and is a cost-effective practice that lends to more personal patient-provider interactions. Bedside posters positively influenced the culture of a hospital organization and reminded providers of the meaning in their work, which literature shows can reduce provider burnout and improve quality of care.
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