The Impact of Intraoperative Anesthesiology Provider Handovers on Postoperative Complications After Hepatopancreatobiliary (HPB) Surgery.

BACKGROUND: The objective of this study is to assess the possible association between intraoperative anesthesia team handovers and increased 90-day major complications following HPB surgery. METHODS: This is a single-center retrospective cohort study of patients who underwent HPB surgery. Anesthesiologist handover (AH) occurred when a complete transfer of care to a receiving anesthesiologist. total anesthesia team handovers (TH) occurred when both anesthesiologist and supervised provider transferred care. The primary outcome was 90-day major complications, defined as an ACCORDION score of ≥ 3. RESULTS: Ninety-day major complications occurred in 35 (21.6%) of TH and 96 (21.9%) of AH patients. With adjustment of other covariates, no significant association was found between AH (OR, 1.358, 95% CI, 0.935-1.973, p = 0.1079) or TH (OR, 1.157, 95% CI, 0.706-1.894, p = 0.5633) and 90-day major complications. CONCLUSIONS: In a high-volume HPB center, anesthesia team handovers were not associated with an increased risk of patients having a major complication within 90 days after HPB surgery.

Application of a Human Factors and Systems Engineering Approach to Explore Care Transitions of Sepsis Survivors From Hospital to Home Health Care.

STUDY AIM: This study aims to describe the transition-in-care work process for sepsis survivors going from hospitals to home health care (HHC) and identify facilitators and barriers to enable practice change and safe care transitions using a human factors and systems engineering approach. BACKGROUND: Despite high readmission risk for sepsis survivors, the transition-in-care work process from hospitals to HHC has not been described. METHODS: We analyzed semi-structured needs assessment interviews with 24 stakeholders involved in transitioning sepsis survivors from two hospitals and one affiliated HHC agency participating in the parent implementation science study, I-TRANSFER. The qualitative data analysis was guided by the Systems Engineering Initiative for Patient Safety (SEIPS) framework to describe the work process and identify work system elements. RESULTS: We identified 31 tasks characterized as decision making, patient education, communication, information, documentation, and scheduling tasks. Technological and organizational facilitators lacked in HHC compared to the hospitals. Person and organization elements in HHC had the most barriers but few facilitators. Additionally, we identified specific task barriers that could hinder sepsis information transfer from hospitals to HHC. CONCLUSION: This study explored the complex transition-in-care work processes for sepsis survivors going from hospitals to HHC. We identified barriers, facilitators, and critical areas for improvement to enable implementation and ensure safe care transitions. A key finding was the sepsis information transfer deficit, highlighting a critical issue for future study. APPLICATION: We recommend using the SEIPS framework to explore complex healthcare work processes before the implementation of evidence-based interventions.

Society for Maternal-Fetal Medicine Special Statement: Curriculum outline on patient safety and quality for maternal-fetal medicine fellows.

To help fellows in maternal-fetal medicine gain a well-rounded education in patient safety and quality, we present a curriculum outline that addresses the requirements of the Accreditation Council for Graduate Medical Education and the American Board of Obstetrics and Gynecology. For each month of fellowship, the outline suggests brief video clips, readings, and activities. Emphasis is placed on helping fellows develop and complete a quality improvement project. If desired, the curriculum can be modified to fit program-specific needs and can be adapted for use with residents in obstetrics and gynecology.

Response to patient safety incidents in healthcare settings in Ghana: the role of teamwork, communication openness, and handoffs.

BACKGROUND: Patient safety incidents (PSIs) in healthcare settings are a critical concern globally, and Ghana is no exception. Addressing PSIs to improve health outcomes requires various initiatives to be implemented including improving patient safety culture, teamwork and communication between healthcare providers during handoffs. It is essential to acknowledge the significance of teamwork, communication openness, and effective handoffs in preventing and managing such incidents. These factors play a pivotal role in ensuring the well-being of patients and the overall quality of healthcare services. AIM: This study assessed the occurrence and types of PSIs in health facilities in Ghana. It also examined the role of teamwork, handoffs and information exchange, and communication openness in response to PSIs by health professionals. METHODS: A cross-sectional study was conducted among 1651 health workers in three regions of Ghana. Using a multi-staged sampling technique, the Survey on Patient Safety Culture Hospital Survey questionnaire and the nurse-reported scale were used to collect the data and it was analysed by descriptive statistics, Pearson correlation, and linear multiple regression model at a significance of 0.05. RESULTS: There was a reported prevalence of PSIs including medication errors (30.4%), wound infections (23.3%), infusion reactions (24.7%), pressure sores (21.3%), and falls (18.7%) at least once a month. There was a satisfactory mean score for responses to adverse events (3.40), teamwork (4.18), handoffs and information exchange (3.88), and communication openness (3.84) among healthcare professionals. Teamwork, handoffs and information exchange and communication openness were significant predictors of response to PSIs, accounting for 28.3% of the variance. CONCLUSIONS: Effective teamwork, handoffs and information exchange, and communication openness in the healthcare environment are critical strategies to enhance PSI response. Creating a culture that encourages error response through teamwork, communication and handoffs provides healthcare professionals with opportunities for learning and improving patient outcomes. Training programs should therefore target health professionals to improve patient safety and competency. Through the implementation of evidence-based practices and learning from past incidents, the healthcare system will be able to deliver safe and high-quality care to patients nationwide. Patient safety must be recognized as an ongoing process. Therefore, a meaningful improvement in patient outcomes requires all stakeholders' commitment.

Patient handoffs and multi-specialty trainee perspectives across an institution: informing recommendations for health systems and an expanded conceptual framework for handoffs.

BACKGROUND: Safe and effective physician-to-physician patient handoffs are integral to patient safety. Unfortunately, poor handoffs continue to be a major cause of medical errors. Developing a better understanding of challenges faced by health care providers is critical to address this continued patient safety threat. This study addresses the gap in the literature exploring broad, cross-specialty trainee perspectives around handoffs and provides a set of trainee-informed recommendations for both training programs and institutions. METHODS: Using a constructivist paradigm, the authors conducted a concurrent/embedded mixed method study to investigate trainees' experiences with patient handoffs across Stanford University Hospital, a large academic medical center. The authors designed and administered a survey instrument including Likert-style and open-ended questions to solicit information about trainee experiences from multiple specialties. The authors performed a thematic analysis of open-ended responses. RESULTS: 687/1138 (60.4%) of residents and fellows responded to the survey, representing 46 training programs and over 30 specialties. There was wide variability in handoff content and process, most notably code status not being consistently mentioned a third of the time for patients who were not full code. Supervision and feedback about handoffs were inconsistently provided. Trainees identified multiple health-systems level issues that complicated handoffs and suggested solutions to these threats. Our thematic analysis identified five important aspects of handoffs: (1) handoff elements, (2) health-systems-level factors, (3) impact of the handoff, (4) agency (duty), and (5) blame and shame. CONCLUSIONS: Health systems, interpersonal, and intrapersonal issues affect handoff communication. The authors propose an expanded theoretical framework for effective patient handoffs and provide a set of trainee-informed recommendations for training programs and sponsoring institutions. Cultural and health-systems issues must be prioritized and addressed, as an undercurrent of blame and shame permeates the clinical environment.

Under the chest pain center mechanism, whether the nursing handover affects the nursing efficiency and the outcomes of patients with STEMI in the emergency department? A retrospective study.

BACKGROUND: The introduction of chest pain centers (CPC) in China has achieved great success in shortening the duration of nursing operations to significantly improve the treatment and outcomes of patients with ST-segment elevation myocardial infarction (STEMI). The nursing handover period is still considered the high incidence period of adverse events because of the distractibility of nurses' attention, potential interruption, and unclear responsibilities. Under the CPC mechanism, the nursing efficiency and patients' outcome, whether affected by the nursing handover, is still a knowledge gap in research. This is also the aim of this study. METHODS: A retrospective study was conducted with data from STEMI patients from a tertiary hospital in the north of Sichuan Province from January 2018 to December 2019 through the Chinese CPC database. Patients are divided into handover and non-handover groups according to the time they presented in the Emergency Department. D2FMC, FMC2FE, FMC2BS, FMC2CBR, FMC2FAD, and D2W were selected to measure nursing efficiency. The occurrence of major adverse cardiovascular events, the highest troponin values within 72 h of hospitalization, and the length of hospitalization were selected to measure the patient outcomes. Continuous variables are summarized as mean ± SD, and t-tests of the data were performed. P-values < 0.05 (two-tailed) were considered statistically significant. RESULTS: A total of 231 cases were enrolled, of which 40 patients (17.3%) were divided into the handover period group, and 191 (82.6%) belonged to the non-handover period group. The results showed that the handover period group took significantly longer on items FMC2BS (P < 0.001) and FMC2FAD (P < 0.001). Still, there were no significant differences in D2FMC and FMC2FE, and others varied too little to be clinically meaningful, as well as the outcomes of patients. CONCLUSION: This study confirms that nursing handover impacts the nursing efficiency of STEMI patients, especially in FMC2BS and FMC2FAD. Hospitals should also reform the nursing handover rules after the construction of CPC and enhance the triage training of nurses to assure nursing efficiency so that CPC can play a better role.

The Use of Telehealth to Improve Handoffs Between Neonatologists and Primary Care Providers for Medically Complex Infants.

As part of the Supporting Pediatric Research Outcomes Utilizing Telehealth (SPROUT) collaboration, three institutions (University of California, Davis, Children's Hospital Colorado, and Children's Hospital of Philadelphia) sought to improve communication with primary care providers (PCPs) using telehealth. This project connected families of neonatal intensive care unit (NICU) patients, their PCPs, and their NICU team through telehealth to provide an enhanced hospital handoff. This case series reports four cases that exemplify the benefits of these enhanced hospital handoffs: Case 1: assisting with changing care plans after NICU discharge, Case 2: demonstrating physical findings, Case 3: incorporation of additional subspecialties through telehealth, Case 4: arranging care for remote patients. Although these cases demonstrate some of the potential benefits of these handoffs, further study is needed to determine acceptability of these handoffs and to see whether they impact patient outcomes.

Prevalence and predictors of team-based care activities between primary care providers and embedded behavioral health providers: a national survey.

Primary care (PC) settings increasingly use team-based care activities with embedded behavioral health providers (BHPs) to enhance patient care via group medical visits, conjoint appointments, team huddles, and warm handoffs. Aim 1 was to describe the variation of team-based care activities within integrated PC clinics. Aim 2 was to explore whether factors associated with the BHP (e.g., gender, training, and experience) and the PC setting (e.g., perceived teamwork) predict engagement in team-based activities. A national sample of eligible BHPs (n = 345; 14.2% response rate) completed an anonymous survey assessing the presence/intensity of team-based care activities. 90% of BHPs reported regularly engaging in team-based care activities with PC teams. Most engagement occurred when providing feedback to PC providers (90.4% at least daily) and during warm handoffs (90.4% at least once daily). Engagement in team-based care was predicted by the level of teamwork occurring within the PC clinic (ßs = .41-.47; ps < .001) and BHP characteristics, such as the number of years spent in PC (ßs = .24-.26, ps < .001). Although these data are promising, with many BHPs reportedly engaging in team-based activities with PC teams, there is significant variation. Researchers should continue to explore whether the engagement in these team-based care activities enhances patient care.

Team Cognition in Handoffs: Relating System Factors, Team Cognition Functions and Outcomes in Two Handoff Processes.

OBJECTIVE: This study investigates how team cognition occurs in care transitions from operating room (OR) to intensive care unit (ICU). We then seek to understand how the sociotechnical system and team cognition are related. BACKGROUND: Effective handoffs are critical to ensuring patient safety and have been the subject of many improvement efforts. However, the types of team-level cognitive processing during handoffs have not been explored, nor is it clear how the sociotechnical system shapes team cognition. METHOD: We conducted this study in an academic, Level 1 trauma center in the Midwestern United States. Twenty-eight physicians (surgery, anesthesia, pediatric critical care) and nurses (OR, ICU) participated in semi-structured interviews. We performed qualitative content analysis and epistemic network analysis to understand the relationships between system factors, team cognition in handoffs and outcomes. RESULTS: Participants described three team cognition functions in handoffs-(1) information exchange, (2) assessment, and (3) planning and decision making; information exchange was mentioned most. Work system factors influenced team cognition. Inter-professional handoffs facilitated information exchange but included large teams with diverse backgrounds communicating, which can be inefficient. Intra-professional handoffs decreased team size and role diversity, which may simplify communication but increase information loss. Participants in inter-professional handoffs reflected on outcomes significantly more in relation to system factors and team cognition (p < 0.001), while participants in intra-professional handoffs discussed handoffs as a task. CONCLUSION: Handoffs include team cognition, which was influenced by work system design. Opportunities for handoff improvement include a flexibly standardized process and supportive tools/technologies. We recommend incorporating perspectives of the patient and family in future work.

Older Adult Patients and Care Partners as Knowledge Brokers in Fragmented Health Care.

OBJECTIVE: To describe older adult patients' and care partners' knowledge broker roles during emergency department (ED) visits. BACKGROUND: Older adult patients are vulnerable to communication and coordination challenges during an ED visit, which can be exacerbated by the time and resource constrained ED environment. Yet, as a constant throughout the patient journey, patients and care partners can act as an information conduit, or knowledge broker, between fragmented care systems to attain high-quality, safe care. METHODS: Participants included 14 older adult patients (≥ 65 years old) and their care partners (e.g., spouse, adult child) who presented to the ED after having experienced a fall. Human factors researchers collected observation data from patients, care partners and clinician interactions during the patient's ED visit. We used an inductive content analysis to determine the role of patients and care partners as knowledge brokers. RESULTS: We found that patients and care partners act as knowledge brokers by providing information about diagnostic testing, medications, the patient's health history, and care accommodations at the disposition location. Patients and care partners filled the role of knowledge broker proactively (i.e. offer information) and reactively (i.e. are asked to provide information by clinicians or staff), within-ED work system and across work systems (e.g., between the ED and hospital), and in anticipation of future knowledge brokering. CONCLUSION: Patients and care partners, acting as knowledge brokers, often fill gaps in communication and participate in care coordination that assists in mitigating health care fragmentation.

Navigating the Path to a Sustainable "PACU Pause" and Standardized Perioperative Handoff: A Quality Improvement Project.

PURPOSE: The purpose of this project was to develop and implement a pause and standardized perioperative handoff to improve the quality of the handoff and the satisfaction of the perioperative team in the postanesthesia care unit (PACU) setting. DESIGN: The Iowa Model for Evidence-Based Practice guided this evidence-based practice-quality improvement project. METHODS: A team was formed of key nurses and other perioperative members to execute the project. The outcome of the evidence review, appraisal, and synthesis supported the change to a pause and standardized perioperative handoff. The project team educated perioperative staff on the practice change and new process. Baseline, 3-month and 1-year data were collected for adherence to the PACU PAUSE and handoff critical elements, and baseline and 3-months for satisfaction. FINDINGS: PACU PAUSE adherence was 42.30% prepractice change, 92.3% postchange and 96.10% at 1-year. Adherence to the 17 critical elements in the standardized handoff was 40.16% prepractice change, 77.36% postchange and 71.78% at 1-year. Nurse satisfaction with the PACU PAUSE and handoff increased 59% and 50% respectively from pre to postpractice change. Operating room nurse and anesthesia provider satisfaction with PACU PAUSE and handoffs was greater than 85% at baseline and increased 14% and 8% respectively. CONCLUSIONS: The PACU PAUSE allows for increased nurse concentration during the handoff and this can improve patient safety. Using a standardized handoff in situation, background, assessment, response format can decrease information loss and miscommunication, improve the quality of the handoff and the perioperative team members satisfaction with the handoff, and may mitigate patient safety events.

Information handoffs in critical care and their implications for information quality: A socio-technical network approach.

OBJECTIVE: The design of health ICTs, as well as human factors, have been shown to influence patient information quality. The aim of this study was to understand how patterns of interaction between these factors influence information quality aspects in a critical care environment. METHOD: We conducted an ethnographic study of socio-technical information handoffs in a critical care unit. Data collection methods included non-participant observations and semi-structured interviews. Methodological principles from network analysis (SNA, VNA) were used to develop visual network diagrams, as well as to analyze the composition of the information network and its influence on patient information quality. RESULTS: The network patterns that emerged uncover that human actors have many information processing and dissemination roles at the critical care unit. However, ICTs play key network roles, acting as information intermediaries and gatekeepers. We further identify three types of information handoffs in the critical care environment - human-human, human-ICT and ICT-human. On the one hand, we find that human-human and ICT-human handoffs influence contextual and intrinsic aspects of patient information, such as information completeness and accuracy. On the other hand, human-ICT handoffs influence information accessibility and representational quality, such as consistency and interpretability. DISCUSSION: The results suggest that standardizing change of shift handoff communication may not be sufficient to prevent information decay in complex care trajectories. In particular, we argue that ensuring information consistency and interpretability across disciplines and professions is as important as ensuring information completeness and accuracy during change of shift handoffs. ICT and workflow design opportunities are discussed as means to address overlapping or conflicting information needs across disciplines and professions, increase information consistency, and reduce information redundancy across the network.

The PATH to patient safety.

Communication is critical to safe patient care. In this issue of the British Journal of Anaesthesia, Jaulin and colleagues show that use of a Post-Anaesthesia Team Handover (PATH) checklist is associated with fewer hypoxaemia events in the PACU, reduced handover interruptions, and other important metrics related to improved communication. The PATH checklist provides a link within a broader chain of safety checklists and other interventions that comprise a perioperative chain of survival.

Frequency of safety net errors in the emergency department: Effect of patient handoffs.

OBJECTIVES: The objective of this study was to determine physician awareness of abnormal vital signs and key clinical interventions (oxygen provision, intravenous access) in the emergency department, and to measure the effect of patient handoffs on this awareness. METHODS: This was a prospective observational study at two large, urban, academic emergency departments. Emergency department physicians were asked the following about each of the physician's patients: 1) the number of IV lines, 2) whether the patient was on supplemental oxygen, and 3) whether the patient had any abnormal vital signs. Physicians were blind to the nature of the study prior to enrollment. Error rates between physician responses and actual patient status were calculated, and logistic regression, adjusted for physician clustering, was used to calculate association of errors with multiple situational factors, including handoff status. RESULTS: We analyzed 463 patient encounters from 74 physicians. Physicians missed abnormal vital signs in 19.4% of encounters. They made errors in oxygen status and number of IV lines in 16.6% and 35.8% of encounters, respectively. Physicians were significantly more likely to make all types of errors on patients who had undergone handoff as opposed to their primary patients. CONCLUSION: Emergency physicians make frequent errors regarding awareness of their patients' vital signs, oxygen and vascular status and patient handoffs are associated with an increased frequency of such errors.

Factors associated with Interhospital transfers of emergency general surgery patients from emergency departments.

BACKGROUND: Emergency general surgery (EGS) conditions account for over 3 million or 7.1% of hospitalizations per year in the US. Patients are increasingly transferred from community emergency departments (EDs) to larger centers for care, and a growing demand for treating EGS conditions mandates a better understanding of how ED clinicians transfer patients. We identify patient, clinical, and organizational characteristics associated with interhospital transfers of EGS patients originating from EDs in the United States. METHOD: We analyze data from the Agency for Healthcare Research and Quality Nationwide Emergency Department Sample (NEDS) for the years 2010-2014. Patient-level sociodemographic characteristics, clinical factors, and hospital-level factors were examined as predictors of transfer from the ED to another acute care hospital. Multivariable logistic regression analysis includes patient and hospital characteristics as predictors of transfer from an ED to another acute care hospital. RESULTS: Of 47,442,892 ED encounters (weighted) between 2008 and 2014, 1.9% resulted in a transfer. Multivariable analysis indicates that men (Odds ratio (OR) 1.18 95% Confidence Interval (95% CI) 1.16-1.21) and older patients (OR 1.02 (95% CI 1.02-1.02)) were more likely to be transferred. Relative to patients with private health insurance, patients covered by Medicare (OR 1.09 (95% CI 1.03-1.15) or other insurance (OR 1.34 (95% CI 1.07-1.66)) had a higher odds of transfer. Odds of transfer increased with a greater number of comorbid conditions compared to patients with an EGS diagnosis alone. EGS diagnoses predicting transfer included resuscitation (OR 36.72 (95% CI 30.48-44.22)), cardiothoracic conditions (OR 8.47 (95% CI 7.44-9.63)), intestinal obstruction (OR 4.49 (95% CI 4.00-5.04)), and conditions of the upper gastrointestinal tract (OR 2.82 (95% CI 2.53-3.15)). Relative to Level I or II trauma centers, hospitals with a trauma designation III or IV had a 1.81 greater odds of transfer. Transfers were most likely to originate at rural hospitals (OR 1.69 (95% CI 1.43-2.00)) relative to urban non-teaching hospitals. CONCLUSION: Medically complex and older patients who present at small, rural hospitals are more likely to be transferred. Future research on the unique needs of rural hospitals and timely transfer of EGS patients who require specialty surgical care have the potential to significantly improve outcomes and reduce costs.

Evaluation of Intraoperative Hand-Off Frequency, Duration, and Context: A Mixed Methods Analysis.

BACKGROUND: Hand-offs in the operating room contribute to poor communication, reduced team function, and may be poorly coordinated with other activities. Conversely, they may represent a missed opportunity for improved communication. We sought to better understand the coordination and impact of intraoperative hand-offs. METHODS: We prospectively audio-video (AV) recorded 10 operations and evaluated intraoperative hand-offs. Data collected included percentage of time team members were absent due to breaks, relationships between hand-offs and intraoperative events (incision, surgical counts), and occurrences of simultaneous hand-offs. We also identified announcement that a hand-off had occurred and anchoring, in which team members not involved in the hand-off participated and provided information. RESULTS: Spanning 2919 min of audio-video data, there were 74 hand-offs (range, 4-14 per case) totaling 225.2 min, representing 7.7% of time recorded. Thirty-two (45.1%) hand-offs were interrupted or delayed because of competing activities; eight hand-offs occurred during an instrument or laparotomy pad count. Six cases had simultaneous hand-offs; two cases had two episodes of simultaneous hand-offs. Eight hand-offs included an announcement. Seven included anchoring. Evaluating both temporary and permanent hand-offs, one or more original team members was absent for 40.7% of time recorded and >one team member was absent for 20.5% of time recorded. CONCLUSIONS: Intraoperative hand-offs are frequent and not well coordinated with intraoperative events including counts and other hand-offs. Anchoring and announced hand-offs occurred in a small proportion of cases. Future work must focus on optimizing timing, content, and participation in intraoperative hand-offs.

Understanding the Information Needs and Context of Trauma Handoffs to Design Automated Sensing Clinical Documentation Technologies: Qualitative Mixed-Method Study of Military and Civilian Cases.

BACKGROUND: Current methods of communication between the point of injury and receiving medical facilities rely on verbal communication, supported by brief notes and the memory of the field medic. This communication can be made more complete and reliable with technologies that automatically document the actions of field medics. However, designing state-of-the-art technology for military field personnel and civilian first responders is challenging due to the barriers researchers face in accessing the environment and understanding situated actions and cognitive models employed in the field. OBJECTIVE: To identify design insights for an automated sensing clinical documentation (ASCD) system, we sought to understand what information is transferred in trauma cases between prehospital and hospital personnel, and what contextual factors influence the collection, management, and handover of information in trauma cases, in both military and civilian cases. METHODS: Using a multi-method approach including video review and focus groups, we developed an understanding of the information needs of trauma handoffs and the context of field documentation to inform the design of an automated sensing documentation system that uses wearables, cameras, and environmental sensors to passively infer clinical activity and automatically produce documentation. RESULTS: Comparing military and civilian trauma documentation and handoff, we found similarities in the types of data collected and the prioritization of information. We found that military environments involved many more contextual factors that have implications for design, such as the physical environment (eg, heat, lack of lighting, lack of power) and the potential for active combat and triage, creating additional complexity. CONCLUSIONS: An ineffectiveness of communication is evident in both the civilian and military worlds. We used multiple methods of inquiry to study the information needs of trauma care and handoff, and the context of medical work in the field. Our findings informed the design and evaluation of an automated documentation tool. The data illustrated the need for more accurate recordkeeping, specifically temporal aspects, during transportation, and characterized the environment in which field testing of the developed tool will take place. The employment of a systems perspective in this project produced design insights that our team would not have identified otherwise. These insights created exciting and interesting challenges for the technical team to resolve.

Spectrum Handoff Based on DQN Predictive Decision for Hybrid Cognitive Radio Networks.

Spectrum handoff is one of the key techniques in a cognitive radio system. In order to improve the agility and the reliability of spectrum handoffs as well as the system throughput in hybrid cognitive radio networks (HCRNs) combing interweave mode with underlay mode, a predictive (or proactive) spectrum handoff scheme based on a deep Q-network (DQN) for HCRNs is proposed in this paper. In the proposed spectrum handoff approach, spectrum handoff success rate is introduced into an optimal spectrum resource allocation model to ensure the reliability of spectrum handoff, and the closed-form expression for the spectrum handoff success rate is obtained based on the Poisson distribution. Furthermore, we exploit the transfer learning strategy to further improve the DQN learning process and finally achieve a priority sequence of target available channels for spectrum handoffs, which can maximize the overall HCRNs throughput while satisfying constraints on secondary users' interference with primary user, limits on the spectrum handoff success rate, and the secondary users' performance requirements. Simulation results show that the proposed spectrum handoff scheme outperforms the state-of-the-art spectrum handoff algorithms based on predictive decision in terms of the convergence rate, the handoff success rate and the system throughput.

"Do You Know What I Know?": How Communication Norms and Recipient Design Shape the Content and Effectiveness of Patient Handoffs.

BACKGROUND: Poor communication during end-of-shift transfers of care (handoffs) is associated with safety risks and patient harm. Despite the common perception that handoffs are largely a one-way transfer of information, researchers have documented that they are complex interactions, guided by implicit social norms and mental frameworks. OBJECTIVES: We investigated communication strategies that resident physicians report deploying to tailor information during face-to-face handoffs that are often based on their implicit inferences about the perceived information needs and potential harm to patients. METHODS/PARTICIPANTS: We interviewed 35 residents in Medicine and Surgery wards at three VA Medical Centers (VAMCs). MAIN MEASURES: We conducted qualitative interviews using audio-recorded semi-structured cognitive task interviews. KEY RESULTS: The effectiveness of handoff communication depends upon three factors: receiver characteristics, type of shift, and patient's condition and perceived acuity. Receiver characteristics, including subjective perceptions about an incoming resident's training or ability levels and their assumed preferences for information (e.g., detailed/comprehensive vs. minimal/"big picture"), influenced content shared during handoffs. Residents handing off to the night team provided more information about patients' medical histories and care plans than residents handing off to the day team, and higher patient acuity merited more detailed information and the medical service(s) involved dictated the types of information conveyed. CONCLUSIONS: We found that handoff communication involves a complex combination of socio-technical information where residents balance relational factors against content and risk. It is not a mechanistic process of merely transferring clinical data but rather is based on learned habits of communication that are context-sensitive and variable, what we refer to as "recipient design." Interventions should focus on raising awareness of times when information is omitted, customized, or expanded based on implicit judgments, the emerging threats such judgments pose to patient care and quality, and the competencies needed to be more explicit in handoff interactions.

A graph-based approach for characterizing resident and nurse handoff conversations.

Prior research has used a variety of qualitative and quantitative approaches for studying handoff communication. Due to the dynamic and interactive nature of handoffs, characterizing the structure and content of these conversations is challenging. In this paper, we use a graph-based approach to characterize handoff communication as a conversation network. Conversation networks were used to compare the structural properties of resident-resident and nurse-nurse handoff communication. Resident (n = 149) and nurse (n = 126) handoff conversations from general medicine units were coded using a previously validated clinical content framework. The coded conversations were then translated into separate resident and nurse conversation networks, and were compared using 11 network measures. Transition probabilities were used to identify commonly repeating sub-networks within resident and nurse conversations. There were significant differences between resident and nurse conversation networks in 10 of the 11 network measures. There were also significant differences in the structure of conversations: compared to resident conversations, nurse conversations were focused on fewer clinical content categories and had more branching and switching between clinical content categories; however, there were clinically-relevant organic relationships in the order of presentation of clinical content among both resident and nurse handoff conversations. We discuss the potential for using graph-based approach as an alternative method for characterizing interactive conversations and also suggest future directions for using network-based approaches for analyzing handoff conversations.