Acetabular Total Hip Arthroplasty Revision: A Summary of Operative Factors, Outcomes, and Comparison of Approaches.

BACKGROUND: Revision total hip arthroplasty (THA) presents a greater risk to patients than primary THA, and surgical approach may impact outcomes. This study aimed to summarize acetabular revisions at our institution and to compare outcomes between direct anterior and posterior revision THA. METHODS: A series of 379 acetabular revision THAs performed from January 2010 through August 2022 was retrospectively reviewed. Preoperative, perioperative, and postoperative factors were summarized for all revisions and compared between direct anterior and posterior revision THA. RESULTS: The average time to acetabular revision THA was 10 years (range, 0.04 to 44.1), with mechanical failure (36.7%) and metallosis (25.6%) being the most prevalent reasons for revision. No differences in age, body mass index, or sex were noted between groups. Anterior revision patients had a significantly shorter length of stay (2.2 versus 3.2 days, P = .003) and rate of discharge to a skilled nursing facility (7.5 versus 25.2%, P = .008). In the 90-day postoperative period, 9.2% of patients returned to the emergency department (n = 35) and twelve patients (3.2%) experienced a dislocation. There were 13.2% (n = 50) of patients having a rerevision during the follow-up period with a significant difference between anterior and posterior approaches (3.8 versus 14.7%, respectively, P = .049). CONCLUSION: This study provides some evidence that the anterior approach may be protective against skilled nursing facility discharge and rerevision and contributes to decreased lengths of stay. We recommend surgeons select the surgical approach for revision THA based on clinical preferences and patient factors.

Same-Day vs One-Day Discharge: Rates and Reasons for Emergency Department Return After Hospital-Based Total Joint Arthroplasty.

BACKGROUND: As short stay and outpatient total joint arthroplasties (TJAs) are more widely adopted, it is important to assess whether reducing length of stay leads to increased emergency department (ED) visits or readmissions. METHODS: This is a retrospective review of 1743 primary TJA patients with same-day discharge (SDD) or 1-day length of stay between January and December 2019. Patients who returned to the ED or were readmitted within 30 days of TJA were identified, and chart review was performed to identify their primary reason for revisit. RESULTS: Patients discharged on the day of surgery (n = 203, 11.6%) were more likely to be younger (P < .001) and have a lower body mass index (total hip arthroplasty, P = .018; total knee arthroplasty, P < .001) and American Society of Anesthesiologists score (P < .001). The overall rate of return was 6.3%, and 1.3% of patients were readmitted. Controlling for age, gender, body mass index, surgery type, and American Society of Anesthesiologists, patients selected for SDD were not found to be at higher risk of return to the ED compared to 1-day length of stay patients (4.9% vs 6.4%, odds ratio 0.980, 95% confidence interval 0.484-1.984, P = .956). CONCLUSION: SDD of eligible patients does not increase the risk of 30-day return to the ED. Continued analysis of risk factors for return and readmission will improve prospective identification of patients who can safely be discharged on the day of surgery, and future quality improvement initiatives should target the most common reasons for ED return.

Preoperative Education for Total Joint Arthroplasty: Does Reimbursement Reduction Threaten Improved Outcomes?

BACKGROUND: Nurse navigation programs have been previously shown to reduce cost and improve outcomes after total joint arthroplasty (TJA). Medicare has proposed a 13.7% reduction in professional fee reimbursement for TJA procedures that may adversely impact providers' and health systems' ability to fund ancillary support resources such as nurse navigators. METHODS: A consecutive series of primary TJAs performed between April 2019 and February 2020 was retrospectively reviewed. Clinical and financial outcomes of patients attending a nurse navigator-led preoperative education class were compared with those who did not attend. RESULTS: There were 2057 TJAs identified during the study period. Most patients attended the preoperative education class (82.7%) and were discharged home (92.8%). Controlling for significant differences between groups, class attendance was associated with reduced length of stay (LOS), increased chance of 0- or 1-day LOS, reduced chance of discharge to a skilled nursing facility, and reduced hospital charges. For this patient sample, a proposed 13.7% reduction in nurse navigator-led classes was modeled to increase overall cost to payers by >$400,000 annually. Complete elimination of this class was estimated to increase the total annual cost by >$5,700,000 and cost per TJA by >$2700. CONCLUSION: The use of a nurse navigator-led preoperative education class was associated with shorter LOS, more frequent 0- and 1-day LOS, reduced discharge to skilled nursing facilities, and lower total hospital charges for those patients who attended. Potential reductions proposed by Medicare may interfere with the ability to support such services and negatively impact both clinical and financial outcomes.

Chloroplast mRNAs are 3' polyuridylylated in the Green Alga Pithophora roettleri (Cladophorales).

Species within the green algal order Cladophorales have an unconventional plastome structure where individual coding regions or small numbers of genes occur as linear single-stranded DNAs folded into hairpin structures. Another group of photosynthetic organisms with an equivalently reduced chloroplast genome are the peridinin dinoflagellates of the Alveolata eukaryotic lineage whose plastomes are mini-circles carrying one or a few genes required for photosynthesis. One unusual aspect of the Alveolata is the polyuridylylation of mRNA 3' ends among peridinin dinoflagellates and the chromerid algae. This study was conducted to understand if an unconventional highly reduced plastome structure co-occurs with unconventional RNA processing. To address this, the 5' and 3' mRNA termini of the known chloroplast genes of Pithophora roettleri (order Cladophorales) were analyzed for evidence of post-transcriptional processing. Circular Reverse Transcriptase PCR (cRT-PCR) followed by deep sequencing of the amplicons was used to analyze 5' and 3' mRNA termini. Evidence of several processing events were collected, most notably the 3' termini of six of the eight genes were polyuridylylated, which has not been reported for any lineage outside of the Alveolata. Other processing events include poly(A) and heteropolymeric 3' additions, 5' primary transcript start sites, as well as the presence of circularized RNAs. Five other species representing other green algal lineages were also tested and poly(U) additions appear to be limited to the order Cladophorales. These results demonstrate that chloroplast mRNA polyuridylylation is not the sole provenance of photosynthetic alveolates and may have convergently evolved in two distinct photosynthetic lineages.

Do not waste your time: straight to magnetic resonance imaging for pediatric burners and stingers.

BACKGROUND: Permanent neurologic injury in pediatric patients with burner and stinger syndrome (BSS) is unlikely. This study aims to assess the feasibility of clinical observation without extensive radiologic workup in this selective population. METHODS: A retrospective study was conducted of patients aged younger than 18 years evaluated at a level I trauma center from 2012 to 2014. Patients were grouped according to positive deficit (PD) or negative deficit (ND) upon physical examination. Demographics, clinical findings, and outcomes were analyzed. RESULTS: Thirty patients (ND, n = 14; PD, n = 16) were evaluated for BSS, most often as a result of injurious football tackle. Age and length of stay were similar between groups. Injury Severity Score was lower in the ND group than the PD group (1.6 ± 1.2 vs 3.8 ± 3.1, respectively; P< .05). Cervical computed tomography was performed on 11 patients (78.6%) in the ND group and 15 patients (93.8%) in the PD group at considerable added cost, with only 1 positive result in the ND group and none in the PD group. Magnetic resonance imaging (MRI) revealed 2 positive findings in each group, and no surgical interventions were indicated. Ten ND (71.4%) and 12 PD (75%) patients reported complete resolution of symptoms at discharge (P> .05). CONCLUSIONS: Children presenting with BSS experience temporary symptoms that resolve without surgical intervention. Magnetic resonance imaging identified more injuries than computed tomographic imaging; therefore, we suggest that management for BSS should include observation, serial neurologic examinations, and MRI evaluation as appropriate.

Molecular identification of sand flies (Diptera: Psychodidae) in eastern North America by using PCR-RFLP.

Sand flies (Diptera: Psychodidae) are small blood-feeding dipterans that are primary vectors of numerous human and livestock pathogens. Effective surveillance programs with accurate identification tools are critical in development and implementation of modern integrated pest management programs. Although morphological keys are available for North American species, identification can still be challenging owing to the nature of sample preparation and incompatibility with molecular or biochemical-based pathology assays. Further, the potential for introduction of Old World or other exotic species is not accounted for by current keys. Herein, we present the development and validation of a restriction fragment-length polymorphism-based molecular identification method. Specifically, cytochrome c oxidase subunit I, a mitochondrial DNA marker, was used to distinguish two species of adult sand flies indigenous to eastern North America with two exotic species not yet known to occur in the United States.

Chronic Dislocation of the Thumb Carpometacarpal Joint: A Case Report.

Dislocation of the thumb carpometacarpal (CMC) joint is a rare injury; chronic CMC dislocation can lead to significant disability. Traditionally, surgical intervention has focused on the reconstruction of the anterior oblique ligament, though more recently there has been more focus on the dorsoradial ligament. Consideration of both ligaments during CMC joint reconstruction is important to optimize functional outcomes. A 59-year-old male presented with a subacute/chronically dislocated CMC joint of the thumb. Open reduction with pin fixation and dorsoradial ligament repair and augmentation was chosen to restore the stability of the joint. Joint reduction without subluxation was successfully maintained. By 12 weeks postoperatively, there were no remaining major restrictions to activity. Repair of the dorsoradial ligament with augmentation and pinning is a viable approach for surgical management of subacute/chronic dislocation of the thumb CMC joint.

Tear of Quadriceps and Patellar Tendon with Superior Pole Avulsion of Patella: A Case Report.

CASE: A 58-year-old man presented with right knee pain and inability to extend the knee after falling. magnetic resonance imaging (MRI) demonstrated complete rupture of the quadriceps tendon, avulsion of the superior pole patella, and a high-grade partial tear of the proximal patellar tendon. Surgical dissection revealed that both tendon tears were full-thickness disruptions. Repair was performed without complications. The patient achieved independent ambulation and passive range of motion from 0° to 118° at 3.8 years postoperatively. CONCLUSIONS: We present a case of a simultaneous ipsilateral tear of the quadriceps and patellar tendons with superior pole patella avulsion that resulted in a clinically successful repair.

Investigation of habitat effects on the spatial distribution of Lutzomyia shannoni across heterogeneous environments, with note of respective mosquito species compositions.

Sand flies are small blood feeding dipterans that are primary vectors of numerous human and livestock pathogens. Control efforts are often complex and multidimensional. A fundamental step in the development and implementation of any integrated pest management (IPM) program is the refining of effective surveillance and identification techniques. Before this study, the presence of two species, Lutzomyia shannoni (Dyar) and Lutzomyia vexator (Coquillett) became known in Kentucky and surrounding states. To understand the spatial distribution of these species across heterogeneous landscapes in this region, trapping was conducted at random locations in previously designated habitats. Although a lack of clear data prevented any conclusions to be drawn for the preferences of L. vexator, the species of greater medical and veterinary importance, L. shannoni, was documented to show a strong preference for habitats along the wooded edges of pasture lands. In the region of study, these lands are frequently used in the production of beef cattle and other livestock, reinforcing the veterinary significance of the findings. Because of their familiarity to vector control officials and operators, mosquito species compositions were compared with the recorded abundance of L. shannoni across the varied habitats. The linking of this information should prove useful to management plans for the phlebotomine, if warranted in the future.

Mitochondrial mRNA Processing in the Chlorophyte Alga Pediastrum duplex and Streptophyte Alga Chara vulgaris Reveals an Evolutionary Branch in Mitochondrial mRNA Processing.

Mitochondria carry the remnant of an ancestral bacterial chromosome and express those genes with a system separate and distinct from the nucleus. Mitochondrial genes are transcribed as poly-cistronic primary transcripts which are post-transcriptionally processed to create individual translationally competent mRNAs. Algae post-transcriptional processing has only been explored in Chlamydomonas reinhardtii (Class: Chlorophyceae) and the mature mRNAs are different than higher plants, having no 5' UnTranslated Regions (UTRs), much shorter and more variable 3' UTRs and polycytidylated mature mRNAs. In this study, we analyzed transcript termini using circular RT-PCR and PacBio Iso-Seq to survey the 3' and 5' UTRs and termini for two green algae, Pediastrum duplex (Class: Chlorophyceae) and Chara vulgaris (Class: Charophyceae). This enabled the comparison of processing in the chlorophyte and charophyte clades of green algae to determine if the differences in mitochondrial mRNA processing pre-date the invasion of land by embryophytes. We report that the 5' mRNA termini and non-template 3' termini additions in P. duplex resemble those of C. reinhardtii, suggesting a conservation of mRNA processing among the chlorophyceae. We also report that C. vulgaris mRNA UTRs are much longer than chlorophytic examples, lack polycytidylation, and are polyadenylated similar to embryophytes. This demonstrates that some mitochondrial mRNA processing events diverged with the split between chlorophytic and streptophytic algae.

Climate change adaptation in conflict-affected countries: A systematic assessment of evidence.

People affected by conflict are particularly vulnerable to climate shocks and climate change, yet little is known about climate change adaptation in fragile contexts. While climate events are one of the many contributing drivers of conflict, feedback from conflict increases vulnerability, thereby creating conditions for a vicious cycle of conflict. In this study, we carry out a systematic review of peer-reviewed literature, taking from the Global Adaptation Mapping Initiative (GAMI) dataset to documenting climate change adaptation occurring in 15 conflict-affected countries and compare the findings with records of climate adaptation finance flows and climate-related disasters in each country. Academic literature is sparse for most conflict-affected countries, and available studies tend to have a narrow focus, particularly on agriculture-related adaptation in rural contexts and adaptation by low-income actors. In contrast, multilateral and bilateral funding for climate change adaptation addresses a greater diversity of adaptation needs, including water systems, humanitarian programming, and urban areas. Even among the conflict-affected countries selected, we find disparity, with several countries being the focus of substantial research and funding, and others seeing little to none. Results indicate that people in conflict-affected contexts are adapting to climate change, but there is a pressing need for diverse scholarship across various sectors that documents a broader range of adaptation types and their results.

Circadian activity of Lutzomyia shannoni (Diptera: Psychodidae) during late season population peaks.

The phlebotomine sand fly, Lutzomyia shannoni (Dyar), is considered both zoophillic and anthropophillic and may be a potential vector of human and livestock pathogens. While the known range of this species in North America has recently been expanded, many aspects of its natural history, which are fundamental components for assessments of disease risk or development of integrated pest management programs for the vector, remain unclear. One is the time of day when individuals are active and searching for blood meals. Through the use of a rotating trap mechanism, male L. shannoni were found to be active earlier in the evening (1-4 h after sunset), whereas the majority of female activity occurred after midnight.

Species diversity and relative abundance of phlebotomine sand flies (Diptera: Psychodidae) on three Army installations in the southern United States and susceptibility of a domestic sand fly to infection with Old World Leishmania major.

Leishmania infections in American veterans of Iraq and Afghanistan have raised concern that veterans could serve as reservoirs of Old World parasites for domestic vector populations. A survey of sand flies on three U.S. Army facilities in the southern United States was conducted to identify potential vectors. Five species, including two new state records, are reported for Fort Hood, TX. Very few flies were detected in Fort Bragg, NC. Large numbers of a man-biting species, Lutzomyia shannoni, were trapped on Fort Campbell, KY. Weekly activity patterns for dominant species are presented. In addition, an infection experiment was conducted to determine if a domestic sand fly is susceptible to infection with Old World Leishmania major. Lu. shannoni became infected and supported Le. major up to 6 days postprandial. Metacyclogenesis and actual transmission of Le. major to an uninfected mouse did not occur because infected flies did not take subsequent blood meals.

The chloroplast and mitochondrial genomes of the green algae Pediastrum duplex isolated from Central Georgia (USA).

A Pediastrum duplex (Chlorophyta) strain was isolated from a freshwater system in Milledgeville, Georgia and its chloroplast and mitochondrial genomes sequenced. The chloroplast genome was 199,241 bp with 136 genes and the mitochondrial 40,756 bp with 40 genes, both were circular. Comparison of the 'Milledgeville' plastome to other P. duplex isolates revealed a nearly identical sequence identity to archived genes and genomic fragments from the strain UTEX1364 which was isolated from Lake Machovo in 1962. These sequences provide chloroplast and mitochondrial genomes from a wild P. duplex isolate and provide more organelle genomes for a genus with cryptic phylogenetic relationships.

Use of a Bioinformatics-Based Toxicity Scoring System to Assess Serotonin Burden and Predict Population-Level Adverse Drug Events from Concomitant Serotonergic Drug Therapy.

STUDY OBJECTIVE: Numerous medications interact at serotonin (5-hydroxytryptamine [5-HT]) receptors directly or through off-target interactions, causing mild to severe serotonergic adverse drug events (ADEs), particularly among older adults. Our objective was to develop a novel molecular-based toxicity scoring system to assess serotonergic burden resulting from concurrently administered drugs. Quantitative methods to assess serotonergic burden may provide a useful clinical tool for improving pharmacotherapy. DESIGN: Retrospective cohort study. DATA SOURCES: PharMetrics Legacy health claims database (January 2001-December 2013) and ChEMBL bioactivity database. PATIENTS: A 2-serotonergic drug exposure cohort (78,172 patients) and a 3-serotonergic drug exposure cohort (19,900 patients) were generated, and population-level statistics were collected. Nonexposure cohorts were created for each drug exposure cohort and matched in a 4:1 ratio for age, sex, and length of enrollment. MEASUREMENTS AND MAIN RESULTS: Eight 5-HT medications were screened against multiple bioactivity databases to identify their off-target interactions at 5-HT receptors and serotonin reuptake transporter protein. A computational serotonin burden score (SBS) was derived from the receptor-specific interaction propensities reported from the comprehensive bioactivity screen. Linear regression was used to characterize associations between SBSs and combined total ADE incidence rate detected by International Classification of Diseases, Ninth Revision, Clinical Modification, diagnosis codes. A significantly greater incidence of 17 potential 5-HT-related ADEs was seen in exposed serotonergic drug cohorts (p<0.05). A positive correlation between SBS and overall ADE incidence rate in the 2-serotonergic drug exposure cohort (R2  = 0.69, p<0.34) and 3-drug cohort (R2  = 0.85, p<0.01) was observed. When both drug cohorts were combined, total drug SBSs strongly correlated with the composite 5-HT adverse event rate (R2  = 0.92, p<0.0001). Despite an increasing burden of illness, these data suggest that drug combinations with higher SBSs are associated with a higher rate of potential serotonergic ADEs. CONCLUSION: In this test of concept, positive associations between SBSs and serotonin-related ADEs suggest that it may offer a pharmacologic-based foundation for developing risk assessment tools to assist in optimizing pharmacotherapy.

USE of CLINICAL TEST CLUSTERS VERSUS ADVANCED IMAGING STUDIES in the MANAGEMENT of PATIENTS with a SUSPECTED SLAP TEAR.

BACKGROUND AND PURPOSE: The Magnetic Resonance Arthrogram (MRA) has served as the gold standard for identifying patients with possible Superior Labrum Anterior-Posterior (SLAP) lesions and are often required by orthopaedic surgeons prior to clinical evaluation. However, as the literature shows MRA sensitivity as 0.65-0.98, and specificity between 0.80-1.00, there is still room for misinterpretation of the imaging study, and potential mismanagement of a patient who may or may not exhibit a true SLAP lesion. It is proposed that by grouping a series of clinical special tests it may be possible to develop greater sensitivity in identifying a SLAP lesion, resulting in the ability to better manage this patient population, thus avoiding unnecessary and costly imaging studies and decreased referrals to surgical specialists. The purpose of this study is to examine specific combinations of SLAP lesion special tests and identify which clusters of tests have the highest sensitivity and specificities. This may allow therapists to improve the management of their patients by reliably diagnosing a SLAP lesion and referring only those who may need surgery to a physician. STUDY DESIGN: Literature review, diagnostic sensitivity/specificity outcomes. METHODS: A retrospective search of the current peer-reviewed literature was performed in an effort to identify the clinical special tests with the greatest sensitivity and specificity in identifying SLAP lesions. Based upon that search, the study was limited to five special tests: Biceps Load I, Biceps Load II, Speed's, Passive Compression, and O'Brien's tests. A multiple regression analysis was performed that looked at grouping of the tests to determine the diagnostic sensitivity/specificity when grouped. RESULTS: Obtaining positive results on three of the five special tests resulted in a sensitivity of 0.992-0.999 and a specificity of 0.992-0.999. The combination of the Biceps Load I/II and O'Brien's showed the highest sensitivity and specificity. CONCLUSION: The results indicate that a combination of at least three positive SLAP lesion tests may be clinically useful in diagnosing a shoulder SLAP lesion with greater diagnostic accuracy than those reported for MRI/MRA, thus improving patient management by referring only those who may require surgical intervention to a physician. LEVEL OF EVIDENCE: 2c, "Outcomes" Research.

Implications of Off-Target Serotoninergic Drug Activity: An Analysis of Serotonin Syndrome Reports Using a Systematic Bioinformatics Approach.

STUDY OBJECTIVE: Serotonergic adverse drug events (ADEs) are caused by enhanced intrasynaptic concentrations of 5-hydroxytryptamine (5-HT). No systematic process currently exists for evaluating cumulative 5-HT and off-target toxicity of serotonergic drugs. The primary study aim was to create a Serotonergic Expanded Bioactivity Matrix (SEBM) by using a molecular bioinformatics, polypharmacologic approach for assessment of the participation of individual 5-HT drugs in serotonin syndrome (SS) reports. DATA SOURCES: Publicly available databases including the U.S. Food and Drug Administration (FDA) Adverse Event Reporting System (FAERS), ChEMBL, DrugBank, PubChem, and Kyoto Encyclopedia of Genes and Genomes (KEGG) were queried for computational and pharmacologic data. DESIGN: An in-house bioinformatics TargetSearch program ( http://dxulab.org/software) was used to characterize 71 serotonergic drugs interacting at 13 serotonin receptor subtypes and serotonin reuptake transporter protein (SERT). In addition, off-target interactions at norepinephrine transporter (NET), monoamine oxidase (MAO), and muscarinic receptors were included to define seven polypharmacological drug cohorts. Serotonin syndrome reports for each serotonergic drug were extracted from FAERS by using the Sternbach and Hunter criteria. MEASUREMENTS AND MAIN RESULTS: A proportional reporting adverse drug reaction (ADR) ratio (PRR) was calculated from each drug's total ADEs and SS case reports and aggregated by drug bioactivity cohorts. Triple-receptor interactions had a disproportionately higher number of SS cases using both the Hunter criteria (mean PRR 1.72, 95% CI 1.05-2.39) and Sternbach (mean PRR 1.54, 95% CI 1.29-1.79). 5-Hydroxytryptamine agonists were associated with a significantly lower proportion of SS cases using the Hunter and Sternbach criteria, respectively (mean PRR 0.49, 95% CI 0.17-0.81 and mean PRR 0.49, 95% CI 0.15-0.83). Drugs with disproportionately higher participation in SS vary considerably between the two diagnostic criteria. CONCLUSION: The SEBM model suggests a possible polypharmacological role in SS. Although further research is needed, off-target receptor activity may help explain differences in severity of toxicity and clinical presentation.

Quantitative Analysis of Aedes albopictus Movement Behavior Following Sublethal Exposure To Prallethrin.

The pyrethroid prallethrin, an AI in DUET™ (Clarke Mosquito Control, St. Charles, IL), is widely marketed ultra-low volume (ULV) mosquito adulticide. Volatilized prallethrin is intended to stimulate mosquito flight, increasing its adulticide effectiveness. However, field tests using volatilized prallethrin have not produced significant differences in mosquito trap catches, leading to questions regarding prallethrin's behavioral impact efficacy. Thus, we conducted laboratory tests of prallethrin's effect on flight behavior of adult female Asian tiger mosquitoes, Aedes albopictus. Mosquitoes were divided into 3 groups: untreated control, exposed to volatilized prallethrin, and exposed to a liquid spray calibrated to simulate a ULV application at label rates. After exposure, mosquito behavior in an airstream of 0.5 m/sec was recorded and analyzed using motion-tracking software. No significant differences in flight behavior were found between the control and treated mosquitoes exposed to volatilized prallethrin. The ULV-sprayed mosquitoes exhibited a significant increase in the number of flight events, the turning frequency, overall movement speed, and flight speed compared to the control-a significant difference in locomotor stimulation response that would increase exposure to a ULV spray cloud. However, our results showed that volatilization alone was insufficient to increase ULV efficacy in the field and suggested that incorporating a more volatile flight stimulant into ULV adulticides would provide a measurable improvement in mosquito control.

Ochlerotatus japonicus japonicus in the state of Kentucky.

Ochlerotatus j. japonicus (Theobald) was first collected and identified in 2003 from CDC gravid trap collections in Boone, Campbell, and Wolfe counties, Kentucky. Subsequent collections during 2004 and 2005 indicate that the species has become established in Boone, Campbell, Fayette, Fleming, Grant, Jefferson, and Kenton counties.