Incorporating nurse absenteeism into staffing with demand uncertainty.

Increased nurse-to-patient ratios are associated negatively with increased costs and positively with improved patient care and reduced nurse burnout rates. Thus, it is critical from a cost, patient safety, and nurse satisfaction perspective that nurses be utilized efficiently and effectively. To address this, we propose a stochastic programming formulation for nurse staffing that accounts for variability in the patient census and nurse absenteeism, day-to-day correlations among the patient census levels, and costs associated with three different classes of nursing personnel: unit, pool, and temporary nurses. The decisions to be made include: how many unit nurses to employ, how large a pool of cross-trained nurses to maintain, how to allocate the pool nurses on a daily basis, and how many temporary nurses to utilize daily. A genetic algorithm is developed to solve the resulting model. Preliminary results using data from a large university hospital suggest that the proposed model can save a four-unit pool hundreds of thousands of dollars annually as opposed to the crude heuristics the hospital currently employs.

Computerized prescriber order entry implementation in a physician assistant-managed hematology and oncology inpatient service: effects on workflow and task switching.

PURPOSE: Little is known about the impact of computerized prescriber order entry (CPOE) systems on inpatient hematology/oncology services. The objective of this study was to quantify the impact of an inpatient CPOE implementation on workflow, with an emphasis on ordering and direct patient care time. METHODS: We conducted a direct-observation time-and-motion study of the provider team of a hematology/oncology inpatient service both before and after CPOE implementation, characterizing workflow into 60 distinct activity categories. The provider team comprised physician assistants supervised by attending physicians. Results were adjusted to account for variations in the census. We also conducted an analysis of computer logs to assess CPOE system usage. RESULTS: Study participants were observed for 228.0 hours over 53 observation sessions. There was little change in the proportion of census-adjusted time spent on ordering (10.2% before v 11.4% after) and on direct patient care (50.7% before v 47.8% after). Workflow fragmentation decreased, with providers spending an average of 131.2 seconds on a continuous task before implementation and 218.3 seconds after (P < .01). An eight-fold decrease in the number of pages was observed during the course of the study. CONCLUSION: CPOE implementation did not negatively affect time available for direct patient care. Workflow fragmentation decreased, which is likely beneficial.

Lean management in academic surgery.

BACKGROUND: Lean is a management system designed to enhance productivity by eliminating waste. Surgical practice offers many opportunities for improving efficiency. Our objective was to determine whether systematic implementation of lean thinking in an academic otolaryngology operating room improves efficiency and profitability and preserves team morale and educational opportunities. STUDY DESIGN: In an 18-month prospective quasi-experimental study, a multidisciplinary task force systematically implemented lean thinking within an otolaryngology operating room of an academic health system. Operating room turnover time and turnaround time were measured during a baseline period; an observer-effect period in which workers were made aware that their efficiency was being measured but before implementing lean changes; and an intervention period after redesign principles had been used. The impact on teamwork, morale, and surgical resident education were measured during the baseline and intervention periods through validated surveys. A profit model was applied to estimate the financial implications of the study. RESULTS: There was no difference between the baseline and observer-effect periods of the study for turnover time (p = 0.98) or turnaround time (p = 0.20). During the intervention period, the mean turnover time and turnaround time were significantly shorter than during the baseline period (29 vs 38 minutes; p < 0.001 and 69 vs 89 minutes; p < 0.001, respectively). The composite morale score suggested improved morale after implementation (p = 0.011). Educational metrics were unchanged before and after implementation. The annual opportunity revenue for the involved operating room is $330,000; when extrapolated throughout the operating rooms, lean thinking could create 6,500 hours of capacity annually. CONCLUSIONS: Application of lean management techniques to a single operating room and surgical service improved operating room efficiency and morale, sustained resident education, and can provide considerable financial gains when scaled to an entire academic surgical suite.

Measurement of foot traffic in the operating room: implications for infection control.

Surgical site infections cause significant morbidity and mortality in the postoperative period. Opening of the operating room door disrupts its filtered atmosphere, increasing contamination above the wound. We conducted a study of traffic in the operating room as a risk for infections. This is an observational study of recorded behaviors in the operating room. Data collected included number of people entering/exiting, the role of these individuals, and the cause for the event. A total of 3071 door openings were recorded in 28 cases. Traffic varied from 19 to 50 events per hour across specialties. The preincision period represented 30% to 50% of all events. Information requests accounted for the majority of events. Door openings increase in direct proportion to case length, but have an exponential relationship with the number of persons in the operating room. There is a high rate of traffic across all specialties, compromising the sterile environment of the operating room.

Young children (<5 yr) and adolescents (>12 yr) with type 1 diabetes mellitus have low rate of partial remission: diabetic ketoacidosis is an important risk factor.

OBJECTIVE: To determine whether there are different rates of partial remission in preschool, school-age children, and adolescents with type 1 diabetes mellitus (T1DM) and to identify clinical characteristics that are associated with increased rate of partial remission. DESIGN/METHODS: A total of 152 consecutive patients with newly diagnosed T1DM in 2004 were studied. Clinical characteristics at diagnosis, hemoglobin A1C (HbA1C), and total daily insulin dose (TDD) at 3-month interval follow-up for 1 yr were analyzed in each age-group (group 1, aged <5 yr; group 2, aged 5-12 yr; and group 3, aged >12 yr). Partial remission was defined as TDD <0.5 units/kg/d with HbA1C <8% assessed at 6 months after diagnosis. RESULTS: Young children (group 1, 26.8%) and adolescents (group 3, 29%) had low rates of partial remission compared with school-age children (group 2, 56%, p = 0.002). There were no differences in the rates of diabetic ketoacidosis (DKA), autoantibody frequency, and HbA1C at diagnosis between age-groups. DKA at diagnosis was associated with less likelihood of having partial remission (p < 0.001). There were no associations between gender, autoantibodies, and HbA1C at diagnosis and the rate of partial remission. CONCLUSIONS: Young children and adolescent children with T1DM had a low rate of partial remission. Metabolic control was poorest in young children, whereas higher dose insulin in adolescents because of insulin resistance contributes to less likelihood of having partial remission. DKA at diagnosis was associated with low rate of partial remission. It is possible that the low frequency of honeymoon phase in young children reflects more aggressive beta-cell destruction in young children.

Impaired endothelial function in healthy African-American adolescents compared with Caucasians.

OBJECTIVE: To determine whether African-American adolescents have endothelial dysfunction compared with Caucasians and whether differences are a result of differences in insulin sensitivity calculated from total glucose (S(I)) or secretion. STUDY DESIGN: Thirty-three Caucasian (13.6 +/- 2.6 years of age; body mass index [BMI] 21.6 +/- 4.4 kg/m2 mean +/- SD) and 25 African-American (13.3 +/- 2.9 years of age; BMI 24.0 +/- 4.4 kg/m2) adolescents were studied. Forearm blood flow (FBF; plethysmography) was measured before and after 5 minutes of arterial occlusion. S(I) and acute insulin response to glucose (AIRG) were measured using intravenous glucose tolerance tests and minimal modeling. RESULTS: Baseline FBF did not differ between races. Postocclusion FBF was lower in African-Americans (17.2 +/- 1.2 vs 22.6 +/- 1.2 mL/dL/minute, P = .006). AIRG was higher in African-Americans (6050 +/- 940 vs 2410 +/- 30 microU minute/mL, P = .001). Pubertal stage had no effect. S(I) did not differ by race or pubertal stage. In African-Americans, percent fall in FVR following arterial occlusion correlated (r = 0.67, P = .001) with log AIRG. No relationships were found between percent fall in FVR and S(I) in either race. CONCLUSION: African-American adolescents have decreased endothelial function. This may be a result of increased insulin secretion. Endothelial dysfunction in African-American adolescents may predispose to cardiovascular and type II diabetes.