Simulating the IMA Recipient Site for DIEP Flap Surgery: A New Model for Dynamic Microsurgery Simulation with Real-Time Respiration and a Pilot Study.

BACKGROUND: Breast reconstruction (BR) using autologous free flaps has been shown to have numerous psychosocial and quality-of-life benefits. Unfortunately, the microsurgical learning curve is quite steep due to some unique operative challenges. Currently, there is no realistic simulation model that captures real-life respiratory excursion and the depth of internal mammary vessels within the compact recipient site. The purpose of this study was to delineate intraoperative measurements of depth and motion, describe the resulting simulation model, and conduct a pilot study evaluating the simulator as an educational resource. METHODS: This is a single-center, ethics-approved study. For the intraoperative measurements, all consecutive patients undergoing free flap BR using internal mammary vessels as recipients were recruited. Patient and intraoperative factors as well as intraoperative measurements were recorded. A dynamic model was developed based on intraoperative parameters. For the pilot study, plastic and reconstructive surgery trainees were recruited to complete a hand-sewn internal mammary artery (IMA) anastomosis using the new simulator and completed objective questionnaires pre- and postsimulation. Subjective feedback was recorded and themes determined. RESULTS: Fifteen operative sites were analyzed. Flap pocket was found to be between 4 and 5 cm in depth with vertical excursion of 3.7 ± 1.0mm and a respiratory rate of 9 to 14 breaths/minute. Previous radiation, rib space, body mass index (BMI), blood pressure, heart rate, tidal volume, and respiratory rate showed no correlation to vessel depth/excursion. Laterality, rib space, BMI, radiation, vitals, and tidal volume had no correlation with vessel movement. Twenty-two trainees were included in the pilot. An increase in confidence and mixed results for anxiety was reported. CONCLUSION: This study reports a novel microsurgical simulation model that provides a realistic deep inferior epigastric perforator free flap BR IMA anastomosis experience. It replicates movement of vessels in situ with real-time respiratory excursion and similar physical structures of the internal mammary system. This model shows promising results for increased use in microsurgical education.

Creation of a nationwide breastfeeding policy for surgical residents: a scoping review protocol.

INTRODUCTION: Breast feeding is recommended for the first year of a baby's life due to numerous benefits for both the child and mother. After returning from maternity leave, surgical trainees face extensive barriers to breast feeding and tend to terminate breast feeding earlier than guideline recommendations. The aim of this scoping review is to assess existing breastfeeding policies for surgical trainees at the national level including postgraduate medical education offices, provincial resident unions and individual surgical programmes. METHODS AND ANALYSIS: A modified Arksey and O'Malley (2005) framework will be used. Specifically, (1) identifying the research question/s and (2) relevant studies from electronic databases and grey literature, (3) identifying and (4) selecting studies with independent verification, and (5) collating, summarising, and reporting data while having ongoing consultation between experts throughout the process. Experts will include a lactation consultant (AGB), a human resource leader (JI), a health information specialist (ES), two independent coders (NZ, LR) and a board-certified surgeon (JD). This work will take place as of December 2020 and be carried out to completion in 2021. ETHICS AND DISSEMINATION: Ethics approval will not be sought for this scoping review. Research findings will be disseminated through publications, presentations and meetings with relevant stakeholders.

Determining the Independent Risk Factors for Worse SCAR-Q Scores and Future Scar Revision Surgery.

BACKGROUND: Scar revisions have been increasing in number. Patient-reported outcome measures are one tool to aid scar modulation decision-making. The aims of this study were to determine patient, scar, and clinical risk factors for (1) low SCAR-Q Appearance, Symptom, and Psychosocial Impact scores and how this differs for children; and (2) the potential need for future scar revision surgery to better identify such patients in a clinical setting. METHODS: A multicenter international cross-sectional cohort study based on survey data of participants with traumatic, surgical, and burn scars attending plastic, hand, and burn clinics in four countries was conducted following the Strengthening the Reporting of Observational Studies in Epidemiology checklist. Univariate analysis to identify risk factors and multivariable logistic analysis to select risk factors were completed. Collinearity for nonindependent factors and C statistic for model discrimination were also calculated. RESULTS: Seven hundred thirty-one participants completed the study booklet, and 546 participants (74.7 percent) had full data. Independent risk factors were determined to be a bothersome scar and perception of scarring badly for all three scales. Risk factors for self-reporting the need for future surgery included a health condition, scarring badly, scar diagnosis, prior scar revision, and low Psychosocial Impact scores. We did not identify evidence of multicollinearity. C statistics were high (0.81 to 0.84). CONCLUSIONS: This study is the first multicenter international study to examine independent risk factors for low patient-reported outcome measure scores and the potential need for future scar revision surgery. Patients that perceive themselves as scarring badly and having a bothersome scar were at a higher risk of scar appearance concern, an increased symptom burden, and poorer psychosocial impact scores. CLINICAL QUESTION/LEVEL OF EVIDENCE: Risk, III.

Psychometric Findings for the SCAR-Q Patient-Reported Outcome Measure Based on 731 Children and Adults with Surgical, Traumatic, and Burn Scars from Four Countries.

BACKGROUND: Each year, millions of individuals develop scars secondary to surgery, trauma, and/or burns. Scar-specific patient-reported outcome measures to evaluate outcomes are needed. To address the gap in available measures, the SCAR-Q was developed following international guidelines for patient-reported outcome measure development. This study field tested the SCAR-Q and examined its psychometric properties. METHODS: Patients aged 8 years and older with a surgical, traumatic, and/or burn scar anywhere on their face or body were recruited between March of 2017 and April of 2018 at seven hospitals in four countries. Participants answered demographic and scar questions, the Fitzpatrick Skin Typing Questionnaire, the Patient and Observer Scar Assessment Scale (POSAS), and the SCAR-Q. Rasch measurement theory was used for the psychometric analysis. Cronbach's alpha, test-retest reliability, and concurrent validity were also examined. RESULTS: Consent was obtained from 773 patients, and 731 completed the study. Participants were aged 8 to 88 years, and 354 had surgical, 184 had burn, and 199 had traumatic scars. Analysis led to refinement of the SCAR-Q Appearance, Symptoms, and Psychosocial Impact scales. Reliability was high, with person separation index values of 0.91, 0.81, and 0.79; Cronbach alpha values of 0.96, 0.91, and 0.95; and intraclass correlation coefficient values of 0.92, 0.94, and 0.88, respectively. As predicted, correlations between POSAS scores and the Appearance and Symptom scales were higher than those between POSAS and Psychosocial Impact scale scores. CONCLUSIONS: With increasing scar revisions, a scar-specific patient-reported outcome measure is needed to measure outcomes that matter to patients from their perspective. The SCAR-Q represents a rigorously developed, internationally applicable patient-reported outcome measure that can be used to evaluate scars in research, clinical care, and quality improvement initiatives.

Psychosocial and quality of life impact of scars in the surgical, traumatic and burn populations: a scoping review protocol.

INTRODUCTION: Despite the fact that millions of scars affect individuals annually, little is known about their psychosocial impact and overall quality of life (QOL) on individuals. Scars from multiple aetiologies may cause psychiatric and emotional disturbances, can limit physical functioning and increase costs to the healthcare system. The purpose of this protocol is to describe the methodological considerations that will guide the completion of a scoping review that will summarise the extent, range and nature of psychosocial health outcomes and QOL of scars of all aetiologies. METHODS AND ANALYSIS: A modified Arksey and O'Malley (2005) framework will be completed, namely having ongoing consultation between experts from the beginning of the process, then (1) identifying the research question/s, (2) identifying the relevant studies from electronic databases and grey literature, with (3) study selection and (4) charting of data by two independent coders, and (5) collating, summarising and reporting data. Experts will include a health information specialist (TAW), scar expert (JSF), scoping review consultant (SCK), as well as at least two independent coders (NZ, AM). ETHICS AND DISSEMINATION: Ethics approval will not be sought for this scoping review. We plan to disseminate this research through publications, presentations and meetings with relevant stakeholders.

Development of a New Patient-reported Outcome Measure for Ear Conditions: The EAR-Q.

BACKGROUND: Patient-reported outcome measures are widely used to improve health services and patient outcomes. The aim of our study was to describe the development of 2 ear-specific scales designed to measure outcomes important to children and young adults with ear conditions, such as microtia and prominent ears. METHODS: We used an interpretive description qualitative approach. Semi-structured qualitative and cognitive interviews were performed with participants with any type of ear condition recruited from plastic surgery clinics in Canada, Australia, United States, and United Kingdom. Participants were interviewed to elicit new concepts. Interviews were audio-recorded, transcribed, and coded using the constant comparison approach. Experts in ear reconstruction were invited to provide input via an online Research Electronic Data Capture survey. RESULTS: Participants included 25 patients aged 8-21 years with prominent ears (n = 9), microtia (n = 14), or another condition that affected ear appearance (n = 2). Analysis of participant qualitative data, followed by cognitive interviews and expert input, led to the development and refinement of an 18-item ear appearance scale (eg, size, shape, look up close, look in photographs) and a 12-item adverse effects scale (eg, itchy, painful, numb). CONCLUSIONS: The EAR-Q in currently being field-tested internationally. Once finalized, we anticipate the EAR-Q will be used in clinical practice and research to understand the patient's perspective of outcomes following ear surgery.

Development of a New Patient-reported Outcome Instrument to Evaluate Treatments for Scars: The SCAR-Q.

BACKGROUND: Every year millions of individuals acquire scars. A literature review of patient-reported outcome (PRO) instruments identified content limitations in existing scar-specific measures. The aim of this study was to develop a new PRO instrument called SCAR-Q for children and adults with surgical, traumatic, and burn scars. METHODS: We performed a secondary analysis of the qualitative datasets used in the development of PRO instruments for plastic and reconstructive surgery, that is, BREAST-Q, FACE-Q, BODY-Q, and CLEFT-Q. The keyword "scar*" was used to extract scar-specific text. Data were analyzed to identify concepts of interest and to form a comprehensive item pool. Scales were developed and refined through multiple rounds of cognitive interviews with patients and with input from international clinical experts between July 2015 and December 2016. RESULTS: A total of 52 children and 192 adults from the qualitative datasets provided between 1 and 34 scar-specific codes (n = 1,227). The analysis led to the identification of 3 key domains for which scales were developed: scar appearance (eg, size, color, contour), scar symptoms (eg, painful, tight, itchy), and psychosocial impact (eg, feeling self-conscious, bothered by scar). Cognitive interviews with 25 adults and 20 pediatric participants with scars, plus feedback from 27 clinical experts, led to rewording and removal of items, and new items added. These steps ensured content validity for SCAR-Q in a broad range of scars. CONCLUSIONS: The SCAR-Q is now being field-tested. Once completed, we anticipate SCAR-Q will be used in clinical practice and in clinical trials to test different scar therapies.

Breast reconstruction: Updated overview for primary care physicians.

OBJECTIVE: To offer primary care providers a comprehensive summary of breast reconstruction options and complications. QUALITY OF EVIDENCE: A literature search was conducted in PubMed with no time restriction using the search terms breast reconstruction, summary, review, complications, and options. Levels of evidence range from I to III. MAIN MESSAGE: As breast cancer survival rates increase, the focus of breast cancer management must shift to include the restoration of a patient's quality of life after cancer. Breast reconstruction plays a crucial role in the restoration of normality for these women. Women who undergo mastectomy often suffer from challenges related to body image, self-esteem, and a decrease in quality of life scores. Cancer Care Ontario's Breast Cancer Treatment Pathway Map mandates that all women diagnosed with breast cancer who might require mastectomy be referred to a plastic surgeon to discuss reconstructive options before surgery. CONCLUSION: The knowledge and guidance of primary care providers is critical to effectively guiding and supporting patients who might undergo breast reconstruction in their decision-making processes. A thorough understanding of patient selection factors, modern options for breast reconstruction, and expected outcomes is essential.

Reconstruction mammaire: Aperçu actualisé à l'intention des médecins de soins primaires.

OBJECTIF: Présenter aux prestataires de soins primaires un résumé complet des options en matière de reconstruction mammaire et de leurs complications. SOURCES DE L'INFORMATION: Une recherche documentaire a été effectuée dans PubMed, sans restrictions relatives à la date de publication, à l'aide des expressions de recherche en anglais breast reconstruction, summary, review, complications et options. Les niveaux des données probantes varient de I à III. MESSAGE PRINCIPAL: Étant donné la hausse des taux de survie au cancer du sein, la prise en charge doit changer de cap pour inclure aussi la restauration de la qualité de vie de la patiente après le cancer. La reconstruction mammaire joue un rôle majeur pour un retour à la normale chez ces femmes. Les femmes qui subissent une mastectomie éprouvent souvent des difficultés quant à leur image corporelle et à leur estime de soi, et elles évaluent leur qualité de vie à la baisse. La carte des voies pathologiques d'Action Cancer Ontario préconise que toutes les femmes ayant reçu un diagnostic de cancer du sein qui pourraient avoir besoin d'une mastectomie soient envoyées en consultation en chirurgie plastique pour discuter des options de reconstruction avant l'opération. CONCLUSION: Les connaissances et les conseils des médecins de soins primaires sont essentiels pour bien orienter et appuyer les patientes dans leur processus décisionnel quant à la reconstruction mammaire. Il est nécessaire de bien comprendre les facteurs de sélection des patientes, les options contemporaines de reconstruction mammaire et les résultats attendus.

A Systematic Review of the Effectiveness of Laser Therapy for Hypertrophic Burn Scars.

The objective of this systematic review was to assess the effectiveness of laser therapy for the treatment of hypertrophic burn scars. Improvements in scar symptoms following laser treatment were reported in 11 of the 12 included studies. However, issues related to overall quality and risk of bias were present in all studies. As a result, there is insufficient scientific evidence to determine the effectiveness of laser therapy from this systematic review. Future studies that use more rigorous study designs such as randomized controlled trials are needed to support the use of laser therapy for hypertrophic burn scars.

Timing of Presentation of Pediatric Compartment Syndrome and Its Microsurgical Implication: A Retrospective Review.

BACKGROUND: Pediatric forearm compartment syndrome can lead to severe functional disability. Although it is known that earlier presentation with decompression leads to better outcomes, it is not known when presentation after injury leads to significant loss of function requiring microsurgical intervention. The authors describe the rate of microsurgical reconstruction after pediatric forearm compartment syndrome as related to timing of presentation. METHODS: A retrospective chart review was conducted of pediatric patients with forearm compartment syndrome between January 1, 2000, and March 22, 2013, after a traumatic upper extremity injury. Demographic information, cause, time to decompression, complications, and functional outcome were recorded. RESULTS: Thirty-five patients aged between 2 and 16 years (8.97 ± 4.12 years) met inclusion criteria. The majority (74 percent) were boys. The right upper extremity was predominantly involved (54 percent), with a predilection for ulnar fractures (66 percent). Fasciotomies were completed for 32 patients (91 percent). Two patients had no decompression (6 percent) because of late presentation. The average time to fasciotomy was less than 12 hours after injury in 16 patients (46 percent), 12 to 48 hours in 15 patients (43 percent), and greater than 48 hours in four patients (11 percent). Complications (63 percent) included nerve injury (40 percent), skin graft (37 percent), scar revision (11 percent), and long flexor tightness requiring serial casting (17 percent). Forearm muscle necrosis requiring microsurgical reconstructive surgery with a gracilis muscle flap occurred in two patients (6 percent). Increased time to decompression was statistically associated with long flexor tightness and gracilis reconstructive surgery. CONCLUSION: Presentation after 48 hours resulted in significant functional deficits requiring reconstructive surgery (gracilis muscle flap reconstruction) or long-term conservative management (serial casting).

A Systematic Review of Surgical Randomized Controlled Trials: Part I. Risk of Bias and Outcomes: Common Pitfalls Plastic Surgeons Can Overcome.

BACKGROUND: The authors investigated the methodological validity of plastic surgery randomized controlled trials that compared surgical interventions. METHODS: An electronic search identified randomized controlled trials published between 2000 and 2013. Reviewers, independently and in duplicate, assessed manuscripts and performed data extraction. Methodological safeguards (randomization, allocation concealment, blinding, and incomplete outcome data) were examined using the Cochrane risk of bias tool. Regression analysis was used to identify trial characteristics associated with risk of bias. RESULTS: Of 1664 potentially eligible studies, 173 randomized controlled trials were included. Proper randomization and allocation concealment methods were described in 61 of 173 (35 percent) and 21 of 173 (12 percent), respectively. Outcome assessors were blinded in 58 of 173 (34 percent) trials, and patients were blinded in 45 of 173 (26 percent). Follow-up rates were high, with 99 of 173 (57 percent) randomized controlled trials appearing to have complete follow-up. An intention-to-treat analysis was used in 19 of 173 (11 percent) trials. One-third (58 of 173, 34 percent) did not state their primary outcomes. The most common type of primary outcome used was a symptom/quality of life, class III, outcome (73 of 173, 42 percent). Multinomial regression demonstrated trials reporting an a priori sample size as more likely to have a low risk of bias (p = 0.001). CONCLUSIONS: This article highlights methodological safeguards that plastic surgeons should consider when interpreting results of a surgical randomized controlled trial. Allocation concealment, outcome assessor blinding, and patient blinding were identified as areas of concern. Valid and reliable outcome measures are being used in plastic surgery. This analysis provides strong rationale for continued focus on the performance and reporting of clinical trials within our specialty.

A Systematic Review of Surgical Randomized Controlled Trials: Part 2. Funding Source, Conflict of Interest, and Sample Size in Plastic Surgery.

BACKGROUND: The authors examined industry support, conflict of interest, and sample size in plastic surgery randomized controlled trials that compared surgical interventions. They hypothesized that industry-funded trials demonstrate statistically significant outcomes more often, and randomized controlled trials with small sample sizes report statistically significant results more frequently. METHODS: An electronic search identified randomized controlled trials published between 2000 and 2013. Independent reviewers assessed manuscripts and performed data extraction. Funding source, conflict of interest, primary outcome direction, and sample size were examined. Chi-squared and independent-samples t tests were used in the analysis. RESULTS: The search identified 173 randomized controlled trials, of which 100 (58 percent) did not acknowledge funding status. A relationship between funding source and trial outcome direction was not observed. Both funding status and conflict of interest reporting improved over time. Only 24 percent (six of 25) of industry-funded randomized controlled trials reported authors to have independent control of data and manuscript contents. The mean number of patients randomized was 73 per trial (median, 43, minimum, 3, maximum, 936). Small trials were not found to be positive more often than large trials (p = 0.87). CONCLUSIONS: Randomized controlled trials with small sample size were common; however, this provides great opportunity for the field to engage in further collaboration and produce larger, more definitive trials. Reporting of trial funding and conflict of interest is historically poor, but it greatly improved over the study period. Underreporting at author and journal levels remains a limitation when assessing the relationship between funding source and trial outcomes. Improved reporting and manuscript control should be goals that both authors and journals can actively achieve.

Cost-effectiveness analysis parallel to a randomized controlled trial comparing vertical scar reduction and inverted T-shaped reduction mammaplasty.

BACKGROUND: A previous randomized controlled trial showed no clear superiority of vertical scar over inverted T-shaped reduction mammaplasty in terms of health-related quality of life. No economic evaluation has been undertaken comparing vertical scar reduction and inverted T -shaped reduction. METHODS: A total of 255 patients were randomized to either vertical scar or inverted T -shaped reduction. The effectiveness was measured with the Health Utilities Index Mark 3. Direct and productivity costs were captured parallel to the randomized controlled trial. Perspectives of the Ministry of Health, patient, and society were considered. RESULTS: Inverted T -shaped reduction dominated vertical scar reduction from the Ministry of Health perspective by being slightly less costly ($3090.06 versus $3106.58) and slightly more effective (0.87 quality-adjusted life-years versus 0.86 quality-adjusted life-years). From the societal and patient perspectives, vertical scar reduction was both less costly and less effective. At the commonly quoted Canadian threshold of $50,000 per quality-adjusted life-year gained, the probability that vertical scar reduction was cost-effective was 29.3, 68.2, and 66.9 percent from the Ministry of Health, patient, and societal perspectives. Subgroup analysis of reductions less than 500 g found that vertical scar reduction was more likely cost-effective. CONCLUSIONS: Vertical scar reduction is more likely than not cost-effective from patient and societal perspectives but not from the Ministry of Health perspective at a willingness-to-pay threshold of $50,000 per quality-adjusted life-year. If we limit vertical scar reduction for resections less than 500 g per breast, this technique is more likely cost-effective from all perspectives.

Development of a five-day basic microsurgery simulation training course: a cost analysis.

The widespread use of microsurgery in numerous surgical fields has increased the need for basic microsurgical training outside of the operating room. The traditional start of microsurgical training has been in undertaking a 5-day basic microsurgery course. In an era characterised by financial constraints in academic and healthcare institutions as well as increasing emphasis on patient safety, there has been a shift in microsurgery training to simulation environments. This paper reviews the stepwise framework of microsurgical skill acquisition providing a cost analysis of basic microsurgery courses in order to aid planning and dissemination of microsurgical training worldwide.

Safety of tissue expander/implant versus autologous abdominal tissue breast reconstruction in postmastectomy breast cancer patients: a systematic review and meta-analysis.

BACKGROUND: Breast reconstruction after mastectomy for breast cancer should be informed by evidence-based knowledge, such as complication rates. The authors compared the safety of tissue expander/implant reconstruction with that of autologous abdominal tissue reconstruction. METHODS: A systematic literature review identified peer-reviewed studies published from January of 2000 to October of 2012 that compared tissue expander/implant against autologous abdominal tissue reconstruction in the MEDLINE, EMBASE, Cochrane Library, PubMed, and ProQuest Dissertations and Theses databases. Two reviewers independently screened all reports and selected the relevant articles using specific inclusion criteria. Data were extracted from the relevant articles using a standardized abstraction form. RESULTS: Fourteen observational studies were identified that included more than 3000 reconstructed breasts. Significant differences were found between these two approaches. The relative risk associated with reconstructive failure favored autologous abdominal tissue (relative risk, 0.14; 95 percent CI, 0.06 to 0.32; I = 0 percent). Surgical-site infection was significantly lower in autologous abdominal tissue reconstruction compared with tissue expander/implant (relative risk, 0.37; 95 percent CI, 0.25 to 0.55; I = 0 percent), although skin or flap necrosis was higher in autologous abdominal tissue reconstruction compared with tissue expander/implant (relative risk, 2.79; 95 percent CI, 1.87 to 4.17). Studies were of low to moderate quality according to the Newcastle-Ottawa scale. CONCLUSIONS: This study suggests that tissue expander/implant reconstruction has a higher risk of reconstructive failure and surgical-site infection compared with autologous abdominal tissue reconstruction. With the lack of long-term safety studies on different approaches to breast reconstruction, additional long-term comparative studies are needed to support evidence-based decision-making. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Systematic review of economic evaluations in plastic surgery.

BACKGROUND: Economic evaluations are quantitative methods comparing alternative interventions using cost data and expected outcomes. They are used to recommend/dissuade adoption of new surgical interventions and compare different clinical pathways, settings (inpatient/outpatient), or time horizons to determine which procedure may be more cost-effective. The objective of this systematic review was to describe all published English economic evaluations related to a plastic surgery domain. METHODS: A comprehensive English literature review of the MEDLINE, EMBASE, The Cochrane Library, Health Economic Evaluations Database, Ovid Health Star, and Business Source Complete databases was conducted (January 1, 1986, to June 15, 2012). Articles were assessed by two independent reviewers using predefined data fields and selected using specific inclusion criteria. Extracted information included country of origin, journal, and date of publication. Domain of plastic surgery and type of economic evaluation were ascertained. RESULTS: Ninety-five articles were included in the final analysis, with cost analysis being the most common economic evaluation (82 percent). Full economic evaluations represented 18 percent. General cutaneous disorders/burns (24 percent), breast surgery (20 percent), and "multiple" (15 percent) were the top domains studied. Authors were predominantly based in the United States (56 percent) and published in the journal Plastic and Reconstructive Surgery (22 percent), with a significant proportion (40 percent) published in the last 5 years. CONCLUSIONS: Partial economic assessments (cost analyses) with limited benefit represent the majority of economic evaluations in plastic surgery. This suggests an urgent need to alert plastic surgeons to the advantages of full economic evaluations (cost-effectiveness and cost utility analyses) and the need to perform such rigorous analyses.

The performance and publication of cost-utility analyses in plastic surgery: Making our specialty relevant.

Increased spending and reduced funding for health care is forcing decision makers to prioritize procedures and redistribute funds. Decision making is based on reliable data regarding the costs and benefits of medical and surgical procedures; such a study design is known as an economic evaluation. The onus is on the plastic surgery community to produce high-quality economic evaluations that support the cost effectiveness of the procedures that are performed. The present review focuses on the cost-utility analysis and its role in deciding whether a novel technique/procedure/technology should be accepted over one that is prevalent. Additionally, the five steps in undertaking a cost-utility (effectiveness) analysis are outlined.

L'augmentation des dépenses et la réduction du financement dans le milieu de la santé forcent les décideurs à prioriser les interventions et à redistribuer les fonds. La prise de décision se fonde sur des données fiables au sujet des coûts et des avantages des interventions médicales et chirurgicales. Une telle méthodologie d'étude est une évaluation économique. La communauté de la chirurgie plastique a la responsabilité de produire des évaluations économiques de qualité qui appuient le rapport coût-efficacité des interventions exécutées. La présente analyse s'attarde sur l'analyse coût-utilité et son rôle dans la décision d'accepter une nouvelle technique, intervention ou technologie par rapport à une autre déjà prévalente. De plus, les cinq étapes pour entreprendre une analyse coût-utilité (efficacité) sont exposées.

Patients with bipolar disorder show a selective deficit in the episodic simulation of future events.

A substantial body of evidence suggests that autobiographical recollection and simulation of future happenings activate a shared neural network. Many of the neural regions implicated in this network are affected in patients with bipolar disorder (BD), showing altered metabolic functioning and/or structural volume abnormalities. Studies of autobiographical recall in BD reveal overgeneralization, where autobiographical memory comprises primarily factual or repeated information as opposed to details specific in time and in place and definitive of re-experiencing. To date, no study has examined whether these deficits extend to future event simulation. We examined the ability of patients with BD and controls to imagine positive, negative and neutral future events using a modified version of the Autobiographical Interview (Levine, Svoboda, Hay, Winocur, & Moscovitch, 2002) that allowed for separation of episodic and non-episodic details. Patients were selectively impaired in imagining future positive, negative, and neutral episodic details; simulation of non-episodic details was equivalent across groups.