S043 mythbuster: truncal vagotomy and gastric drainage procedures.

INTRODUCTION: You are sitting for your oral surgery board exam and the examiner asks what you do when you realize that you have accidentally cut the posterior vagus nerve during a hiatal hernia repair. Is the answer to proceed with a gastric drainage procedure correct? The prevailing dogma seems to be that inadvertent vagotomy will produce gastric stasis/paresis and the stomach will not empty and hence should be accompanied by a gastric drainage procedure. This report presents clinical outcomes of 49 patients who underwent truncal vagotomy without a drainage procedure (pyloroplasty or gastrojejunostomy). METHODS: 49 patients underwent truncal vagotomy with laparoscopic adjustable gastric banding in an IRB (Investigational Review Board)-approved clinical trial to determine if the addition of a vagotomy would increase achieved weight loss when compared to gastric banding alone. The details of this trial were presented at SAGES (Martin and Earle in Surg Endosc 25:2522-2525, 2011) in 2010. The patients in this study have been followed for over ten years and their histories were examined to look for evidence of gastric stasis or intractable diarrhea or if they required further surgery for these complaints. RESULTS: 49 patients have been followed for a mean of 10.9 years. All except one have experienced a loss of hunger and cessation of gastric borborygmus. One patient showed mild delayed gastric emptying after developing diabetes. Two other patients with DM carry a diagnosis of gastroparesis. No patient has experienced intractable diarrhea. Five patients have had revisions to sleeve gastrectomy or gastric bypass for weight loss failure or esophageal dilatation and GERD. CONCLUSIONS: Review of these truncal vagotomy patients without drainage procedures at 10 years does not support the myth that the stomach will not empty after vagotomy and a gastric drainage procedure should always accompany truncal vagotomy.

Comparison of rat and rabbit embryo-fetal developmental toxicity data for 379 pharmaceuticals: on the nature and severity of developmental effects.

Regulatory non-clinical safety testing of human pharmaceuticals typically requires embryo-fetal developmental toxicity (EFDT) testing in two species (one rodent and one non-rodent). The question has been raised whether under some conditions EFDT testing could be limited to one species, or whether the testing in a second species could be decided on a case-by-case basis. As part of a consortium initiative, we built and queried a database of 379 compounds with EFDT studies (in both rat and rabbit animal models) conducted for marketed and non-marketed pharmaceuticals for their potential for adverse developmental and maternal outcomes, including EFDT incidence and the nature and severity of adverse findings. Manifestation of EFDT in either one or both species was demonstrated for 282 compounds (74%). EFDT was detected in only one species (rat or rabbit) in almost a third (31%, 118 compounds), with 58% (68 compounds) of rat studies and 42% (50 compounds) of rabbit studies identifying an EFDT signal. For 24 compounds (6%), fetal malformations were observed in one species (rat or rabbit) in the absence of any EFDT in the second species. In general, growth retardation, fetal variations, and malformations were more prominent in the rat, whereas embryo-fetal death was observed more often in the rabbit. Discordance across species may be attributed to factors such as maternal toxicity, study design differences, pharmacokinetic differences, and pharmacologic relevance of species. The current analysis suggests that in general both species are equally sensitive on the basis of an overall EFDT LOAEL comparison, but selective EFDT toxicity in one species is not uncommon. Also, there appear to be species differences in the prevalence of various EFDT manifestations (i.e. embryo-fetal death, growth retardation, and dysmorphogenesis) between rat and rabbit, suggesting that the use of both species has a higher probability of detecting developmental toxicants than either one alone.

Truncal vagotomy without drainage: Are there long-term concerns?

INTRODUCTION: Panelists at SAGES 2013 suggested that inadvertent vagotomy was the cause of the bloating, diarrhea, and delayed gastric emptying that is sometimes seen after complex foregut reconstructions that require extensive esophageal dissection. Is it correct to ascribe these symptoms to vagotomy and imply that a drainage procedure should always accompany truncal vagotomy? To examine the long-term sequelae of truncal vagotomy alone, the present report examines clinical outcomes of 49 patients who had truncal vagotomy without drainage at the time of placement of an adjustable gastric band. METHODS: Forty-nine patients underwent truncal vagotomy with laparoscopic adjustable gastric banding in an Investigational Review Board approved clinical trial to determine whether the addition of a vagotomy would increase weight loss when compared to gastric banding alone. The details of this trial were presented at SAGES in 2010 [1]. The patients in this study have been followed for over 5 years. RESULTS: Forty-nine patients have been followed for a mean of 5.6 years. All except one have experienced a loss of hunger and cessation of gastric borborygmus. One patient showed mild delayed gastric emptying when evaluated for GERD. None of the patients experienced intractable diarrhea. CONCLUSIONS: These outcomes do not support the prevailing surgical recommendation and dogma that vagotomy should always be accompanied by a drainage procedure. Furthermore, these outcomes would suggest that it is misleading to ascribe inadvertent vagotomy as the cause of the bloating, diarrhea, and delayed gastric emptying that may occasionally be reported by patients after difficult esophageal dissections.

Molecular Characterization and Phylogenetic Relationships of Plant-Parasitic Nematodes Associated with Turfgrasses in North Carolina and South Carolina, United States.

The near-full-length 18S ribosomal DNA (rDNA) gene and internal transcribed spacer 1 region were amplified and sequenced from 52 nematode populations belonging to 28 representative species in 13 families recovered from turfgrasses in North Carolina (38 populations) and South Carolina (14 populations). This study also included 13 nematode populations from eight other plant hosts from North Carolina for comparison. Nematodes were molecularly characterized and the phylogenetic relationships were explored based on 18S rDNA sequences. Phylogenetic analysis using Bayesian inference was performed using five groups of the plant-parasitic nematode populations Tylenchids, Criconematids, Longidorids, Xiphinematids, and Trichodorids. The 65 nematode populations were clustered correspondingly within appropriate positions of 13 families, including Belonolaimidae, Caloosiidae, Criconematidae, Dolichodoridae, Hemicycliophoridae, Hoplolaimidae, Heteroderidae, Longidoridae, Meloidogynidae, Paratylenchidae, Pratylenchidae, Telotylenchidae, and Trichodoridae. This study confirms previous morphological-based identification of the plant-parasitic nematode species found in turfgrasses and provides a framework for future studies of plant-parasitic nematodes associated with turfgrasses based upon DNA sequences and phylogenetic relationships.

Predictive endocrine testing in the 21st century using in vitro assays of estrogen receptor signaling responses.

Thousands of environmental chemicals are subject to regulatory review for their potential to be endocrine disruptors (ED). In vitro high-throughput screening (HTS) assays have emerged as a potential tool for prioritizing chemicals for ED-related whole-animal tests. In this study, 1814 chemicals including pesticide active and inert ingredients, industrial chemicals, food additives, and pharmaceuticals were evaluated in a panel of 13 in vitro HTS assays. The panel of in vitro assays interrogated multiple end points related to estrogen receptor (ER) signaling, namely binding, agonist, antagonist, and cell growth responses. The results from the in vitro assays were used to create an ER Interaction Score. For 36 reference chemicals, an ER Interaction Score >0 showed 100% sensitivity and 87.5% specificity for classifying potential ER activity. The magnitude of the ER Interaction Score was significantly related to the potency classification of the reference chemicals (p < 0.0001). ERα/ERß selectivity was also evaluated, but relatively few chemicals showed significant selectivity for a specific isoform. When applied to a broader set of chemicals with in vivo uterotrophic data, the ER Interaction Scores showed 91% sensitivity and 65% specificity. Overall, this study provides a novel method for combining in vitro concentration response data from multiple assays and, when applied to a large set of ER data, accurately predicted estrogenic responses and demonstrated its utility for chemical prioritization.

Update on EPA's ToxCast program: providing high throughput decision support tools for chemical risk management.

The field of toxicology is on the cusp of a major transformation in how the safety and hazard of chemicals are evaluated for potential effects on human health and the environment. Brought on by the recognition of the limitations of the current paradigm in terms of cost, time, and throughput, combined with the ever increasing power of modern biological tools to probe mechanisms of chemical-biological interactions at finer and finer resolutions, 21st century toxicology is rapidly taking shape. A key element of the new approach is a focus on the molecular and cellular pathways that are the targets of chemical interactions. By understanding toxicity in this manner, we begin to learn how chemicals cause toxicity, as opposed to merely what diseases or health effects they might cause. This deeper understanding leads to increasing confidence in identifying which populations might be at risk, significant susceptibility factors, and key influences on the shape of the dose-response curve. The U. S. Environmental Protection Agency (EPA) initiated the ToxCast, or "toxicity forecaster", program 5 years ago to gain understanding of the strengths and limitations of the new approach by starting to test relatively large numbers (hundreds) of chemicals against an equally large number of biological assays. Using computational approaches, the EPA is building decision support tools based on ToxCast in vitro screening results to help prioritize chemicals for further investigation, as well as developing predictive models for a number of health outcomes. This perspective provides a summary of the initial, proof of concept, Phase I of ToxCast that has laid the groundwork for the next phases and future directions of the program.

Diversity and Occurrence of Plant-parasitic Nematodes Associated with Golf Course Turfgrasses in North and South Carolina, USA.

One hundred and eleven golf courses from 39 counties in the Carolinas were surveyed for plant-parasitic nematodes. Species diversity within habitats was analyzed with five diversity indices including Diversity index (H'), Evenness (J'), Richness (SR), Dominance (λ) and Diversity (H2 ). The results revealed a remarkably high diversity of 24 nematode species belonging to 19 genera and 11 families. Of those, 23 species were found in SC, 19 species in NC, and 18 species were detected in both states. Helicotylenchus dihystera, Mesocriconema xenoplax, Hoplolaimus galeatus, Tylenchorhynchus claytoni, Belonolaimus longicaudatus, Meloidogyne graminis and Paratrichodorus minor were the most prevalent and abundant species in golf course turfgrasses in both states. Twelve species were new records of plant parasitic nematodes in turfgrasses in both NC and SC. The results also revealed effects of different habitats on diversity of nematode species in turfgrass ecosystem. H' and SR values were higher in SC than in NC. H', J' and H2 values were significantly higher in sandy than in clay soil in NC, but no significant differences between sand and clay soil were detected in SC or in pooled data from both states. There were no significant differences for all indices among the management zones (putting green, fairway and tee) in NC. However, in SC and pooled data, H', SR and H2 were significantly higher in putting greens than in fairways and tees. Significant differences from different grass species (bermudagrass, creeping bentgrass and zoysiagrass) were detected only in H', which was significantly higher in zoysiagrass than in bentgrass or bermudagrass in NC. In pooled data, H' was significantly higher in zoysiagrass samples than in creeping bentgrass samples but was not significantly different from bermudagrass samples.

Description of Hemicaloosia graminis n. sp. (Nematoda: Caloosiidae) Associated with Turfgrasses in North and South Carolina, USA.

A new nematode species was discovered during a diversity survey of plant-parasitic nematodes on turfgrass conducted in North and South Carolina in 2010 and 2011. It is described herein as Hemicaloosia graminis n. sp. and is characterized by two annuli in the lip region, one lateral line, body 610.0-805.0 µm long, stylet 65.0-74.6 µm long, vulva at 84.1% -85.8% of the body , 254-283 annuli, vulva at the 38-53(rd) annulus from tail terminus, 12-14 annuli between vulva and anus, tail elongate-pointed, 67.5-84.8 µm long in females and spicule straight, 31.0 µm long, caudal alae well developed, two lateral lines in males. The newly described species is morphologically closest to H. paradoxa, but has a longer stylet (65.0-74.6 vs 61.0-65.0 µm) and a higher V-value (84.1-85.8 vs 78.1-84.0%), less RV (38-53 vs 50-56), higher RVan (12-14 vs 10) in females, and a shorter tail (30.1 vs 36.7 µm) and more anteriorly located excretory pore (105.9 vs 140.0 µm) in the male. It was easily differentiated from other species based on near-full-length small subunit rRNA gene (SSU) and ITS1 sequences. Phylogenetic analysis from SSU supports placement in a monophyletic clade with the genus Caloosia. An identification key and a table of distinguishing characteristics are presented for all seven species of Hemicaloosia.

Laparoscopic adjustable gastric banding with truncal vagotomy: any increased weight loss?

BACKGROUND: Laparoscopic adjustable gastric banding (LAGB) causes weight loss primarily through a mechanical restrictive mechanism. The vagus nerve provides connections between the brain and the gut through afferent and hormonal signals that regulate fullness and satiety. Published studies demonstrate clinically significant weight loss by subjects undergoing open surgical truncal vagotomy for ulcer disease and morbid obesity. This study aimed primarily to evaluate the safety and efficacy of adding truncal vagotomy to LAGB and to compare the weight loss with that of LAGB alone. METHODS: This open-label case-controlled study was conducted at Central Carolina Surgery, PA, a private bariatric surgery practice in Greensboro, North Carolina. Since May 2006, 49 subjects with classes 2 and 3 obesity have undergone LAGB with truncal vagotomy. The anterior and posterior nerves were divided and resected just below the diaphragm and sent to pathology. The primary safety variable was the number of procedure-related adverse events. The primary efficacy variable was the percentage of excess weight loss (%EWL). Completeness of vagotomy was assessed by direct inspection, microscopic confirmation, and endoscopic Congo red testing after intravenous Baclofen stimulation. For the ongoing comparison, 49 cohorts were matched for age, sex, and preoperative body mass index (BMI). RESULTS: At enrollment, the average BMI was 45 kg/m(2), and the average age was 46 years. No intraoperative or unanticipated adverse events occurred. All the subjects were discharged in 24 h less. One case of incomplete vagotomy was confirmed via pathologic evaluation. The LAGB plus vagotomy group had an average EWL of 38% at an mean of 34 months after surgery, and the cohort group had an average EWL of 36% at a mean of 36 months after surgery. All the vagotomy patients reported an absence of hunger. No diarrhea, no significant gastric outlet obstruction, and no dumping were seen. CONCLUSIONS: The study data do not support the hypothesis that vagotomy added to LAGB enhances weight loss.

Evaluating the Sensitivity and Specificity of Promising Circulating Biomarkers to Diagnose Liver Injury in Humans.

Early diagnosis of drug-induced liver injury (DILI) continues to be a major hurdle during drug development and postmarketing. The objective of this study was to evaluate the diagnostic performance of promising biomarkers of liver injury-glutamate dehydrogenase (GLDH), cytokeratin-18 (K18), caspase-cleaved K18 (ccK18), osteopontin (OPN), macrophage colony-stimulating factor (MCSF), MCSF receptor (MCSFR), and microRNA-122 (miR-122) in comparison to the traditional biomarker alanine aminotransferase (ALT). Biomarkers were evaluated individually and as a multivariate model in a cohort of acetaminophen overdose (n = 175) subjects and were further tested in cohorts of healthy adults (n = 135), patients with liver damage from various causes (n = 104), and patients with damage to the muscle (n = 74), kidney (n = 40), gastrointestinal tract (n = 37), and pancreas (n = 34). In the acetaminophen cohort, a multivariate model with GLDH, K18, and miR-122 was able to detect DILI more accurately than individual biomarkers alone. Furthermore, the three-biomarker model could accurately predict patients with liver injury compared with healthy volunteers or patients with damage to muscle, pancreas, gastrointestinal tract, and kidney. Expression of K18, GLDH, and miR-122 was evaluated using a database of transcriptomic profiles across multiple tissues/organs in humans and rats. K18 mRNA (Krt18) and MiR-122 were highly expressed in liver whereas GLDH mRNA (Glud1) was widely expressed. We performed a comprehensive, comparative performance assessment of 7 promising biomarkers and demonstrated that a 3-biomarker multivariate model can accurately detect liver injury.

Does a surgeon as first assistant reduce the incidence of common bile duct injuries during laparoscopic cholecystectomy?

This retrospective review supports the hypothesis that a surgeon acting as first assistant during laparoscopic cholecystectomy will reduce the incidence of significant common bile duct (CBD) injuries (BDIs). Central Carolina Surgery, P.A., is a single-specialty general surgery group of 19 surgeons that have performed 8767 laparoscopic cholecystectomies from October 1999 to December 2007. In those cases, 89 per cent of the cases had surgeons as first assistants and 66 per cent of the cases were performed with intraoperative cholangiography. Five cases of BDI occurred during this period for an incidence of 0.0570 per cent. Only three of these injuries required bilioenteric anastomotic reconstruction. When this same group of surgeons learned to perform laparoscopic cholecystectomy in 1990, their published series (Surgical Endoscopy: [1993] 7: 300 to 303] of 762 cases had 98 per cent of cases performed with a surgeon as first assistant and no CBD injuries. Only 27 per cent of those 762 cases had intraoperative cholangiograms. This single-practice general surgery experience supports the use of a surgeon as first assistant to lower the incidence of CBD injures.

Quality Control and Basics of Sterile Compounding: Attempting to Avoid Out-of-Specification Results and Patient Harm in Sterile Compounding.

What do you do when something goes wrong in your cleanroom? What do you do when a sterility test fails and what are the implications of such a failure? What should you do when your environmental monitoring or personnel monitoring provides results that exceed your action levels? A root cause analysis is needed in any situation where action levels are exceeded or tests are out of specification. However, should the questions be what can be done to prevent these occurrences, and how can the development be noticed before they occur? In this article, we will discuss going beyond the recommendations of United States Pharmacopeia Chapter <797> to attempt to build a program that limits the possibility of contamination through monitoring of the facility, personnel, and procedures in aseptic processing. We will also discuss other resources published by the U.S. Food and Drug Administration that address monitoring of sterile compounding and aseptic processing.

Essential Skills for Family Medicine Residents Practicing Integrated Behavioral Health A Delphi Study.

BACKGROUND AND OBJECTIVES: There are several trends compelling physicians to acquire team-based skills for interprofessional care. One underdeveloped area of team-based skills for physicians is integrated behavioral health (IBH) in primary care. We used a Delphi method to explore what skills were needed for residents to practice integrated behavioral health. METHODS: We conducted a literature review of IBH competencies and found 41 competencies across seven domains unique to physicians. Using a modified Delphi technique, we recruited family medicine educators to rate each competency as "essential," "compatible," or "irrelevant." We also shared findings from the Delphi study with a focus group for additional feedback. RESULTS: Twenty-one participants (12 physicians, nine behavioral health providers) completed all three rounds of the Delphi survey resulting in a list of 21 competencies. The focus group gave additional feedback. CONCLUSIONS: Participants chose skills that required physicians to share responsibilities across the entire care team, were not redundant with standard primary care, and necessitated strong communication ability. Many items were revised to reflect team-based care and a prescribed physician role as a team facilitator. Next steps include determining how these competencies fit with a variety of medical providers and creating effective training programs that develop competency in IBH.

Religious Vaccine Exemptions in Kindergartners: 2011-2018.

BACKGROUND: Forty-five states permit religious exemptions to school immunization laws; 15 allow personal belief exemptions. Updated religious exemption estimates are lacking, and it is unclear if personal belief exemption availability impacts religious exemption rates. We aimed to (1) update religious exemption trends in kindergartners, (2) compare states' proportions of kindergartners with religious exemptions by personal belief exemption availability, and (3) describe whether the proportion of kindergartners with religious exemptions changed in Vermont after it eliminated personal belief exemptions in 2016. METHODS: We analyzed Centers for Disease Control and Prevention data on exemptions for children entering kindergarten from 2011 to 2018, including 295 state-years in our final analysis. Using a quasi-binomial regression analysis, we compared mean proportions of kindergartners with religious exemptions in states allowing both nonmedical exemptions against states with religious exemptions only, adjusting for policy strength and school year. RESULTS: States with religious and personal belief exemptions were one-fourth as likely to have kindergartners with religious exemptions as states with religious exemptions only (risk ratio 0.25; 95% confidence interval 0.16-0.38). After Vermont's policy change, the mean proportion of kindergartners with a religious exemption increased from 0.5% to 3.7%. States were significantly more likely to have kindergartners with religious exemptions during the 2017-2018 school year compared with the 2011-2012 school year (P = .04). CONCLUSIONS: Religious exemption rates appear to be associated with personal belief exemption availability, may be subject to a replacement effect on personal belief exemption elimination, and are increasing. Researchers and policy makers should confirm findings with individual-level studies and reconsider the purpose and nature of religious exemption laws.

Limited Chemical Structural Diversity Found to Modulate Thyroid Hormone Receptor in the Tox21 Chemical Library.

BACKGROUND: Thyroid hormone receptors (TRs) are critical endocrine receptors that regulate a multitude of processes in adult and developing organisms, and thyroid hormone disruption is of high concern for neurodevelopmental and reproductive toxicities in particular. To date, only a small number of chemical classes have been identified as possible TR modulators, and the receptors appear highly selective with respect to the ligand structural diversity. Thus, the question of whether TRs are an important screening target for protection of human and wildlife health remains. OBJECTIVE: Our goal was to evaluate the hypothesis that there is limited structural diversity among environmentally relevant chemicals capable of modulating TR activity via the collaborative interagency Tox21 project. METHODS: We screened the Tox21 chemical library (8,305 unique structures) in a quantitative high-throughput, cell-based reporter gene assay for TR agonist or antagonist activity. Active compounds were further characterized using additional orthogonal assays, including mammalian one-hybrid assays, coactivator recruitment assays, and a high-throughput, fluorescent imaging, nuclear receptor translocation assay. RESULTS: Known agonist reference chemicals were readily identified in the TR transactivation assay, but only a single novel, direct agonist was found, the pharmaceutical betamipron. Indirect activation of TR through activation of its heterodimer partner, the retinoid-X-receptor (RXR), was also readily detected by confirmation in an RXR agonist assay. Identifying antagonists with high confidence was a challenge with the presence of significant confounding cytotoxicity and other, non-TR-specific mechanisms common to the transactivation assays. Only three pharmaceuticals-mefenamic acid, diclazuril, and risarestat-were confirmed as antagonists. DISCUSSION: The results support limited structural diversity for direct ligand effects on TR and imply that other potential target sites in the thyroid hormone axis should be a greater priority for bioactivity screening for thyroid axis disruptors. https://doi.org/10.1289/EHP5314.

Physician Well-Being: Physician Burnout.

Physician burnout affects patients and physicians. Recent studies estimate that more than half of all physicians in the United States currently are experiencing burnout. Burnout can include symptoms of emotional exhaustion, depersonalization, cognitive weariness, physical fatigue, and disengagement. It can lead to physical and psychological conditions in physicians and decrease patient safety, quality of care, and satisfaction. The health care work environment appears to be the main contributing factor in the current high rates of physician burnout. Although individual- and organizational-level interventions appear to be effective in reducing burnout, there is no conclusive evidence regarding which intervention or combination of interventions alleviates symptoms. Physicians can reduce burnout with use of mindfulness and stress management techniques. Beyond the level of the individual physician, employers and payers should recognize the benefits of supporting physician well-being and making medical practice a rewarding and healthy experience.

Basics of Sterile Compounding: Criteria for Determining Beyond-use Dating.

Compounding pharmacists must separately and collectively evaluate multiple aspects of a compounded sterile preparation when determining their beyond-use date. Considerations include the microbiological risk level, storage temperature, chemical stability, batch size, and whether or not a sterility test will be performed. The United States Pharmacopeia Chapter <797> provides guidance on the maximum beyond-use date allowed solely based on the microbiological risk level associated with the compounding of a sterile preparation. Compounders should select the shortest beyond-use date between the risk-level based beyond-use date and the chemical stability of the compound. When compounding pharmacists intend to provide a compounded sterile preparation with a beyond-use date that exceeds the risk-level based recommendations in United States Pharmacopeia Chapter <797>, they must ensure that their formulations are sterility tested in compliance with United States Pharmacopeia Chapter <71>. United States Pharmacopeia Chapter <71> compliance includes conducting method suitability that is applicable to the strength and batch size that they plan to prepare. Chemical stability must be a separate consideration for each formulation.

Quality Assurance and Quality Control: Being Prepared for U.S. Food and Drug Administration Inspections and Staying in Compliance with United States Pharmacopeia Chapter <797>: Part 1.

Compounders engaged in making sterile preparations need to employ a quality assurance system of documented policies and procedures to attempt to reduce the possibility of contamination. The quality-assurance program will be monitored through the facility's quality control system. Compounders should be aware of the requirements of each state they are licensed in as well as the inspection observations commonly noted in 483s issued by the U.S. Food and Drug Administration. In part 1 of this 2-part article, we discuss the currently evolving regulatory environment and why sterile compounding requires planning and monitoring to deliver quality compounds to patients. Part 2 will examine the United States Pharmacopeia's discussion on the principles of quality assurance and quality control in sterile compounding.

Basics of Sterile Compounding. Quality Assurance and Quality Control: Being Prepared for U.S. Food and Drug Administration Inspections and Staying in Compliance with United States Pharmacopeia Chapter <797>: Part 2.

Compounders engaged in making sterile preparations need to employ a quality-assurance system of documented policies and procedures to attempt to reduce the possibility of contamination. The quality-assurance program will be monitored through the facility's quality-control system. Compounders should be aware of the requirements of each state they are licensed in as well as the inspection observations commonly noted in 483s issued by the U.S. Food and Drug Administration. Part 1 of this 2-part article discussed the currently evolving regulatory environment and why sterile compounding requires planning and monitoring to deliver quality compounds to patients. Part 2 examines the United States Pharmacopeia's discussion on the principles of quality assurance and quality control in sterile compounding.

An AOTF-based dual-modality hyperspectral imaging system (DMHSI) capable of simultaneous fluorescence and reflectance imaging.

An acousto-optic tunable filter (AOTF)-based system for dual-modality hyperspectral imaging (DMHSI) has been developed for use in characterization of normal and malignant mouse tissue. The system consists of a laser, endoscope, AOTF, and two cameras coupled with optics and electronics. Initial results show that the system can delineate normal and malignant mouse tissues real-time. The analysis shows that malignant tissues consistently exhibit less fluorescent intensity in the wavelength band from 440 to 540 nm with a peak intensity of around 490 nm. The analysis also shows key spectroscopic differences between normal and malignant tissues. Further, these results are compared to real-time spectroscopic data and show good correlation.