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Biomedical subjects

Warren S Sandberg

Publications and source records attributed to Warren S Sandberg.

At least 19 recordsLinked to original sources

Automated documentation error detection and notification improves anesthesia billing performance.

BACKGROUND: Documentation of key times and events is required to obtain reimbursement for anesthesia services. The authors installed an information management system to improve record keeping and billing performance but found that a significant number of their records still could not be billed in a timely manner, and some records were never billed at all because they contained documentation errors. METHODS: Computer software was developed that automatically examines electronic anesthetic records and alerts clinicians to documentation errors by alphanumeric page and e-mail. The software's efficacy was determined retrospectively by comparing billing performance before and after its implementation. Staff satisfaction with the software was assessed by survey. RESULTS: After implementation of this software, the percentage of anesthetic records that could never be billed declined from 1.31% to 0.04%, and the median time to correct documentation errors decreased from 33 days to 3 days. The average time to release an anesthetic record to the billing service decreased from 3.0+/-0.1 days to 1.1+/-0.2 days. More than 90% of staff found the system to be helpful and easier to use than the previous manual process for error detection and notification. CONCLUSION: This system allowed the authors to reduce the median time to correct documentation errors and the number of anesthetic records that were never billed by at least an order of magnitude. The authors estimate that these improvements increased their department's revenue by approximately $400,000 per year.

Anesthesia↗

Maximizing operating room and recovery room capacity in an era of constrained resources.

HYPOTHESIS: Three parallel processing operating rooms (ORs) (concurrent induction and turnover) with a dedicated 3-bed mini-recovery room (mini-postanesthesia care unit [PACU]) will optimize patient throughput and main PACU workload when compared with 4 traditional ORs or 4 parallel processing ORs. DESIGN: Statistical and mathematical models projected the impact of parallel processing on case throughput and PACU use. SETTING: Academic medical center with 48 traditional ORs using serial induction and turnover and 1 experimental OR, the operating room of the future, with parallel processing. PARTICIPANTS: All surgical cases from October 2002 through March 2004 (N = 49 887). INTERVENTIONS: A statistical model projected the duration of induction, surgery, turnover, and PACU stay for cases performed in a traditional OR (n = 48 667) based on the operating room of the future (n = 1220) experience. A fluid queuing model compared each combination using specific probability density functions. MAIN OUTCOME MEASURES: Each OR configuration was evaluated for case throughput and minutes of work sent to the PACU. RESULTS: Although all cases save OR time with parallel processing, only select surgeon-case combinations translate time saved into additional cases per day (26%). Without additional PACU slots, output from 4 parallel processing ORs further stresses the PACU. Three parallel processing ORs and a mini-PACU balances incremental volume by offsetting PACU utilization in 84% of cases. CONCLUSION: In a PACU-constrained environment, 3 parallel processing ORs with a mini-PACU configuration offers increased throughput and decreased PACU workload.

Academic Medical Centers↗

Reorganizing patient care and workflow in the operating room: a cost-effectiveness study.

BACKGROUND: Many surgeons believe that long turnover times between cases are a major impediment to their productivity. We hypothesized that redesigning the operating room (OR) and perioperative-staffing system to take advantage of parallel processing would improve throughput and lower the cost of care. METHODS: A state of the art high tech OR suite equipped with augmented data collection systems served as a living laboratory to evaluate both new devices and perioperative systems of care. The OR suite and all the experimental studies carried out in this setting were designated as the OR of the Future Project (ORF). Before constructing the ORF, modeling studies were conducted to inform the architectural and staffing design and estimate their benefit. In phase I a small prospective trial tested the main hypothesized benefits of the ORF: reduced patient intra-operative flow-time, wait-time and operative procedure time. In phase II a larger retrospective study was conducted to explore factors influencing these effects. A modified process costing method was used to estimate costs based on nationally derived data. Cost-effectiveness was evaluated using standard methods. RESULTS: There were 385 cases matched by surgeon and procedure type in the retrospective dataset (182 ORF, 193 standard operating room [SOR]). The median Wait Time (12.5 m ORF vs 23.8 m SOR), Operative Procedure Time (56.1 m ORF vs 70.5 m SOR), Emergence Time (10.9 m ORF vs 14.5 m SOR) and Total Patient OR Flowtime (79.5 m ORF vs 108.9 m SOR) were all shorter in the ORF (P < .05 for all comparisons). The median cost/patient was $3,165 in the ORF (interquartile range, $1,978 to $4,426) versus $2,645 in SORs (interquartile range, $1,823 to $3,908) (P = ns). The potential change in patient throughput for the ORF was 2 additional patients/day. This improved throughput was primarily attributable to a marked reduction in the non-operative time (ie, those activities commonly accounting for "turnover time") rather than facilitation of faster operations. The incremental cost-effectiveness ratio of ORF was $260 (interquartile range, $180 to $283). CONCLUSION: The redesigned perioperative system improves patient flow, allowing more patients to be treated per day. Cost-effectiveness analysis suggests that the additional costs incurred by higher staffing ratios in an ORF environment are likely to be offset by increases in productivity. The benefits of this system are realized when performing multiple, short-to-medium duration procedures (eg, <120 m).

Cost-Benefit Analysis↗

Financial and operational impact of a direct-from-PACU discharge pathway for laparoscopic cholecystectomy patients.

BACKGROUND: We assessed the operational and financial impact of discharging laparoscopic cholecystectomy (LC) patients directly from the postanesthetic care unit (PACU) in comparison with post-transfer discharge from a hospital bed in a busy academic hospital. METHODS: We retrospectively compared 6 months of performance (bed utilization; recovery room and hospital length of stay; complications; readmissions; hospital costs, revenue, and margin) after implementation of PACU discharges (case patients) to the corresponding 6 months in the prior year (control patients). RESULTS: After implementation, 66% of LC case patients were discharged on the day of surgery, compared with 29% in the control group (P < .05). Eighty percent of the day-of-surgery discharges were directly from the PACU. Shifting to PACU discharge saved 1 in-hospital bed transfer and 1 bed-day for each PACU discharge. Recovery room length of stay for PACU discharge patients was 26% longer than for hospital discharge patients (P = NS). Average hospital length of stay for all patients discharged on the day of surgery was 3.2 hours shorter (P < .05) for case patients (80% PACU discharge) than for control patients. There were no readmissions in the PACU discharge group and no difference in complications. While costs, revenue, and net margin for PACU discharge patients were reduced by 40% to 50% (P < .02) relative to floor discharge patients, the hospital's net margin for the combined case patient group was preserved relative to the control group. CONCLUSIONS: PACU discharge of LC patients significantly reduces bed utilization, decreases in-hospital transfers, and allows congested hospitals to better accommodate patient care needs and generate additional revenue.

Adult↗

Statistical process control as a tool for monitoring nonoperative time.

BACKGROUND: Administrators need simple tools to quickly identify even small changes in the performance of perioperative systems. This applies both to established systems and to impact assessments of deliberate perioperative system design changes. METHODS: Statistical process control was originally developed to detect nonrandom variation in manufacturing processes by continuous comparison to previous performance. The authors applied the technique to assess the nonoperative time performance between successive cases for same surgeon following themselves in a redesigned operating room. This operating room specifically implemented a new patient care pathway that improves throughput by reducing the nonoperative time. The authors tested how quickly statistical process control detected reductions in nonoperative time. They also tested the ability of statistical process control to detect successively smaller performance changes and investigated its utility for longitudinal process monitoring. RESULTS: Statistical process control detected a clear reduction in nonoperative time after the new operating room had been used for only 2 days. The method could detect nonoperative time changes of between 5 and 10 min per case for a single operating room within one fiscal quarter. Nonoperative time for the new process was globally stable over the 31 months analyzed, but late in the analysis period, the authors detected small performance decrements, mostly attributable to factors external to the new operating room. CONCLUSIONS: Statistical process control is useful for detecting changes in perioperative system performance, represented in this study by nonoperative time. The technique is able to detect changes quickly and to detect small changes over time.

Algorithms↗

Operating room design and its impact on operating room economics.

PURPOSE OF REVIEW: Operating rooms are high-cost/high-revenue environments. In an era of rising costs and declining reimbursement, it is essential to optimize the effectiveness of the operating room suite, maximizing throughput of profitable cases while minimizing the costs of necessary, but unprofitable, procedures. RECENT FINDINGS: Operating room management focuses on reducing wasted time in order to perform more cases in regular business hours, reduce overtime, or provide a better experience for staff and patients. It has been difficult to improve perioperative efficiency enough to reliably add cases during regular hours because the required time savings are so large, while most interventions can save only a few minutes per case. Recent work, however, has changed the basic paradigms for turning over operating rooms, dramatically reducing nonproductive time and increasing operating room throughput. In some situations, the additional expense required to achieve throughput improvements is more than offset by financial gains. SUMMARY: Redesigning perioperative systems can increase operating room throughput, but not all case mixes benefit from the required additional resources. Thus hospitals should choose judiciously if, and to what degree, high throughput environments are implemented. Once implemented, access to these environments can be used as an incentive for improved surgical performance.

Facility Design and Construction↗

The effect of direct-from-recovery room discharge of laparoscopic cholecystectomy patients on recovery room workload.

Ambulatory laparoscopic cholecystectomy pathways move patients through the hospital without encountering delays caused by congested inpatient bed units. However, redirecting patients to a direct discharge pathway might not be beneficial if recovery capacity is further taxed by additional workload. In this study, we attempt to assess the operational impact on recovery room workload of directly discharging laparoscopic cholecystectomy patients to home. We conducted a retrospective case-control review of recovery room flow sheets to determine recovery room time and effort required for laparoscopic cholecystectomy patients. The study was restricted to patients of a single surgeon to minimize confounds from surgical technique. Fifty-seven case patients (May 1, 2004, through November 30, 2004), all managed with intent to directly discharge from the recovery room, were compared with control patients (n = 81) from the corresponding 6 months in the year before the direct-discharge plan. The times (mean; 95% confidence interval) to meet objective criteria for adequate pain control (3.5 minutes [2.1 to 5.9] versus 4.0 minutes [2.6 to 6.1]) and readiness for discharge from phase 1 recovery (8.1 minutes [4.8 to 13.6] versus 6.1 minutes [4.0 to 9.5]) were not different between the groups. The number and distribution of interventions documented in the recovery process were not different between groups, nor was there a difference in recovery room length of stay (158 minutes [138 to 182] versus 149 minutes [132 to 167]). In our study, recovery room records reveal little if any increased workload associated with the direct-to-home discharge of laparoscopic cholecystectomy patients.

Cholecystectomy, Laparoscopic↗

Craniocervical extension improves the specificity and predictive value of the Mallampati airway evaluation.

BACKGROUND: The modified Mallampati (MMP) classification is a standard airway examination that assesses mouth opening and structures within the oral cavity. Recent data suggest that maximal mouth opening (as measured by interdental distance) is possible only with extension of the craniocervical junction. Because the MMP examination is performed with the head in a neutral position, the airway may appear worse because of submaximal interdental distance. We hypothesized that adding craniocervical extension to the MMP would allow for greater mouth opening, lower scores, and less false positives than the traditional MMP examination. METHODS: Multiple clinicians with at least 1 yr of airway experience evaluated adult airways (n = 60) with the MMP examination (with head in neutral position). The same examination was then repeated with the addition of craniocervical extension (Extended Mallampati Score, EMS). RESULTS: On average, craniocervical extension decreased the MMP class (P < 0.002). The EMS improved specificity from 70% to 80% and positive predictive value from 24% to 31% when compared with the traditional MMP. The sensitivity (83%) was the same for MMP and EMS. CONCLUSIONS: Craniocervical extension improves the specificity and positive predictive value of the MMP airway evaluation while retaining sensitivity of the traditional MMP examination. The introduction of the EMS into clinical practice should be considered.

Adult↗

Introducing new technology into the operating room: measuring the impact on job performance and satisfaction.

BACKGROUND: The Massachusetts General Hospital (MGH) Operating Room of the Future (ORF) project is a test site for evaluating new surgical technologies and processes. Here we evaluate the effect on staff satisfaction and burnout of introducing a set of new technologies. METHODS: Staff satisfaction and burnout were measured via sequential surveys based on the Maslach Burnout Inventory during the introduction of a new technology system. Functional behavior of the OR was measured in terms of flow time (time to transit the OR) and wait time (time to access the OR). These data were gathered using time-motion analysis methods. RESULTS: Significant functional improvements were found in the ORF (more than 35% reduction in flow time and wait time, P < .05). During the same period, more exposure to the ORF resulted in greater sense of personal accomplishment among surgeons, a worse sense of personal accomplishment among nurses, more emotional exhaustion among surgeons, and less emotional exhaustion among nurses. However, the responses for emotional exhaustion were reversed the greater the time from exposure to the ORF. Staff with 6 to 10 years' experience were at highest risk for burnout across all categories. General surgeons experienced more emotional exhaustion than other physicians. CONCLUSIONS: Tracking the response of all users and identifying groups at high risk for burnout when exposed to new systems should be a central part of any new technology project.

Burnout, Professional↗

Deliberate perioperative systems design improves operating room throughput.

BACKGROUND: New operating room (OR) design focuses more on the surgical environment than on the process of care. The authors sought to improve OR throughput and reduce time per case by goal-directed design of a demonstration OR and the perioperative processes occurring within and around it. METHODS: The authors constructed a three-room suite including an OR, an induction room, and an early recovery area. Traditionally sequential activities were run in parallel, and nonsurgical activities were moved from the OR to the supporting spaces. The new workflow was supported by additional anesthesia and nursing personnel. The authors used a retrospective, case- and surgeon-matched design to compare the throughput, cost, and revenue performance of the new OR to traditional ORs. RESULTS: For surgeons performing the same case mix in both environments, the new OR processed more cases per day than traditional ORs and used less time per case. Throughput improvement came from superior nonoperative performance. Nonoperative Time was reduced from 67 min (95% confidence interval, 64-70 min) to 38 min (95% confidence interval, 35-40 min) in the new OR. All components of Nonoperative Time were meaningfully reduced. Operative Time decreased by approximately 5%. Hospital and anesthesia costs per case increased, but the increased throughput offset costs and the global net margin was unchanged. CONCLUSIONS: Deliberate OR and perioperative process redesign improved throughput. Performance improvement derived from relocating and reorganizing nonoperative activities. Better OR throughput entailed additional costs but allowed additional patients to be accommodated in the OR while generating revenue that balanced these additional costs.

Anesthesia↗

Automatic detection and notification of "wrong patient-wrong location'' errors in the operating room.

When procedures and processes to assure patient location based on human performance do not work as expected, patients are brought incrementally closer to a possible "wrong patient-wrong procedure'' error. We developed a system for automated patient location monitoring and management. Real-time data from an active infrared/radio frequency identification tracking system provides patient location data that are robust and can be compared with an "expected process'' model to automatically flag wrong-location events as soon as they occur. The system also generates messages that are automatically sent to process managers via the hospital paging system, thus creating an active alerting function to annunciate errors. We deployed the system to detect and annunciate "patient-in-wrong-OR'' events. The system detected all "wrong-operating room (OR)'' events, and all "wrong-OR'' locations were correctly assigned within 0.50+/-0.28 minutes (mean+/-SD). This corresponded to the measured latency of the tracking system. All wrong-OR events were correctly annunciated via the paging function. This experiment demonstrates that current technology can automatically collect sufficient data to remotely monitor patient flow through a hospital, provide decision support based on predefined rules, and automatically notify stakeholders of errors.

Automation↗

Surgical field fire during a repair of bronchoesophageal fistula.

Most surgical fires involve the airway but they can also occur in the surgical field. Herein, we report an intraoperative fire in the surgical field during repair of a bronchoesophageal fistula. During the portion of the surgery after the fistula was divided and the bronchus was open to atmosphere, continuous positive airway pressure was applied to the nondependent lung, and in conjunction with the use of electrocautery and dry sponges in the field, resulted in a fire. Anesthesia for thoracic surgery carries unique risks of fire because these patients frequently require large oxygen concentrations, special interventions for improving oxygenation, and have variable degrees of airway disruption. This report highlights unique safety concerns during anesthesia for thoracic surgery, and addresses more general safety issues relating to fire risk in all surgical patients.

Aged↗

Endobronchial blocker dislodgement leading to pulseless electrical activity.

This is a report of a case in which an endobronchial blocker was dislodged, leading to severe air trapping and a brief episode of pulseless electrical activity. Bronchial blockade for lung deflation was successfully instituted during emergency repair of a ruptured descending aortic aneurysm. During a period not involving manipulation of aortic cross-clamps, end-tidal CO2 decreased precipitously to zero and airway pressures increased markedly, followed by equalization of intracardiac pressures. Prompt deflation of the endobronchial blocker balloon reversed the problem. We hypothesize that when surgical manipulation dislodged the bronchial blocker into the tracheal position, leading to profound air trapping as successive, stacked tidal volumes were forced distal to the blocker.

Aged↗

Usability factors in the organization and display of disparate information sources in the operative environment.

The integration and presentation of information from a number of disparate sources in the operative environment raises a number of usability and human factors challenges. Through a collaborative effort, a display combining persistent and dynamically switching panes provides a rich source of information to help orient team members, provide indications of case progress, and organize information into stage-based tabbed panes. This provides maximal flexibility within visibility and usability constraints.

Data Display↗

Does parallel workflow impact anesthesia quality?

Redesigns of workflow to allow parallel processing of OR tasks in the Operating Room of the Future at Massachusetts General Hospital have reduced non-operative time, increasing OR throughput. Automatically gathered anesthesia times were studied to address concerns that the new process constricted anesthesia work time. Upon close examination, it was found that 'Induction Time' was the only time interval not impacted by extraneous influences that invalidated other metrics based on the automatic data. 'Induction Time' increased in the Operating Room of the Future as compared to Standard Operating Rooms.

Anesthesia↗

Integration of hospital information systems, operative and peri-operative information systems, and operative equipment into a single information display.

The integration of disparate information systems in the operative environment allows access to information that is typically unseen or unused. Through a collaborative effort, a variety of information systems and surgical equipment are being integrated. This provides improved context-sensitive information display and decision support and improved access to information to improve workflow, safety and visualization of information that was previously unattainable.

Data Display↗

Identification of a general anesthetic binding site in the diacylglycerol-binding domain of protein kinase Cdelta.

Protein kinase C (PKC) is an important signal transduction protein that has been proposed to interact with general anesthetics at its cysteine-rich diacylglycerol/phorbol ester-binding domain C1, a tandem repeat of C1A and C1B subdomains. To test this hypothesis, we expressed, purified, and characterized the high affinity phorbol-binding subdomain, C1B, of mouse protein kinase Cdelta, and studied its interaction with general anesthetic alcohols. When the fluorescent phorbol ester, sapintoxin-D, bound to PKCdelta C1B in buffer at a molar ratio of 1:2, its fluorescence emission maximum, lambda(max), shifted from 437 to 425 nm. The general anesthetic alcohols, butanol and octanol, further shifted lambda(max) of the PKCdelta C1B-bound sapintoxin-D in a concentration-dependent, saturable manner to approximately 415 nm, suggesting that alcohols interact at a discrete allosteric binding site. To identify this site, PKCdelta C1B was photolabeled with three photo-activable diazirine alcohol analogs, 3-azioctanol, 7-azioctanol, and 3-azibutanol. Mass spectrometry showed photoincorporation of all three alcohols in PKCdelta C1B at a stoichiometry of 1:1 in the labeled fraction. The photolabeled PKCdelta C1B was subjected to tryptic digest, the fragments were separated by online chromatography and sequenced by mass spectrometry. Each azialcohol photoincorporated at Tyr-236. Inspection of the known structure of PKCdelta C1B shows that this residue is situated adjacent to the phorbol ester binding pocket, and within approximately 10 A of the bound phorbol ester. The present results provide direct evidence for an allosteric anesthetic site on protein kinase C.

Amino Acid Sequence↗