Milk polar lipids reduce lipid cardiovascular risk factors in overweight postmenopausal women: towards a gut sphingomyelin-cholesterol interplay.

OBJECTIVE: To investigate whether milk polar lipids (PL) impact human intestinal lipid absorption, metabolism, microbiota and associated markers of cardiometabolic health. DESIGN: A double-blind, randomised controlled 4-week study involving 58 postmenopausal women was used to assess the chronic effects of milk PL consumption (0, 3 or 5 g-PL/day) on lipid metabolism and gut microbiota. The acute effects of milk PL on intestinal absorption and metabolism of cholesterol were assessed in a randomised controlled crossover study using tracers in ileostomy patients. RESULTS: Over 4 weeks, milk PL significantly reduced fasting and postprandial plasma concentrations of cholesterol and surrogate lipid markers of cardiovascular disease risk, including total/high-density lipoprotein-cholesterol and apolipoprotein (Apo)B/ApoA1 ratios. The highest PL dose preferentially induced a decreased number of intestine-derived chylomicron particles. Also, milk PL increased faecal loss of coprostanol, a gut-derived metabolite of cholesterol, but major bacterial populations and faecal short-chain fatty acids were not affected by milk PL, regardless of the dose. Acute ingestion of milk PL by ileostomy patients shows that milk PL decreased cholesterol absorption and increased cholesterol-ileal efflux, which can be explained by the observed co-excretion with milk sphingomyelin in the gut. CONCLUSION: The present data demonstrate for the first time in humans that milk PL can improve the cardiometabolic health by decreasing several lipid cardiovascular markers, notably through a reduced intestinal cholesterol absorption involving specific interactions in the gut, without disturbing the major bacterial phyla of gut microbiota. TRIAL REGISTRATION NUMBER: NCT02099032 and NCT02146339; Results.

Impact of prenatal diagnosis on the outcome of patients with a transposition of great arteries: A 24-year population-based study.

BACKGROUND: Transposition of great arteries (TGA) defined as the combination of concordant atrioventricular and discordant ventriculo-arterial connections is one of the most common congenital heart defects. Prenatal diagnosis of TGA remains difficult. To determine the impact of antenatal diagnosis we evaluated the sensitivity of antenatal detection and the neonatal mortality of TGA considering two study periods and two major types of TGA. METHODS: A cross-sectional study was performed. Data were collected from a French population-based birth defect registry. From 1988 to 2012, 94 fetuses with TGA were registered. The study period was subdivided into the 1988 to 1999 period and the 2000 to 2012 period. Two types of TGA were considered: isolated TGA (n = 66) and associated TGA (n = 28). A stratified analysis was performed considering the study periods and the types of TGA. RESULTS: Considering the study periods, the sensitivity of prenatal detection of TGA increased significantly (9.8% vs. 51.5%, p = 0.0001). The same trend was found for associated TGA (4.8% vs. 33.3%, p = 0.002) and isolated TGA (21.1% vs. 100%, p < 0.001). A late diagnosis of TGA (7 days after birth) was observed in 13.2% of cases. Neonatal mortality decreased significantly over time for isolated TGA (25.0% vs. 0 p = 0.01). Prenatal diagnosis of both types of TGA did not improve survival. CONCLUSION: We demonstrated that prenatal diagnosis and neonatal mortality of TGA varied greatly according to the malformation type and the study period. This could be explained by an improvement in terms of medical management.

General anaesthetic agents do not influence persistent pain after breast cancer surgery: A prospective nationwide cohort study.

BACKGROUND: It has recently been suggested that propofol exerts a protective effect on the occurrence of persistent pain after breast cancer surgery. We analysed data from a subcohort taken from a multicentre study to validate this information. OBJECTIVE: The objective of this article is to study the role of the agent used for maintenance of general anaesthesia on the occurrence of persistent pain, with adjustment for multiple pre and peri-operative variables using the generalised linear model. DESIGN: A prospective cohort study. SETTING: Four French university hospitals. PATIENTS: Three hundred and twenty-eight and 362 patients with full dataset, depending on the studied outcome. INTERVENTION: Questionnaires sent at the third and the sixth month after surgery. MAIN OUTCOME MEASURES: The risk of persistent postsurgical neuropathic pain (defined by the DN4 questionnaire) within 6 months after surgery, and the intensity of persistent pain at the sixth month. RESULTS: Axillary lymph node harvesting and previous history of peripheral neuropathy were independent risk factors of persistent postsurgical neuropathic pain, although older age was protective. The same independent risk factors, but not age, explained the intensity of persistent postsurgical pain at the sixth month after surgery. We did not find any effect of the general anaesthetic, whether halogenated agent or propofol, using either unadjusted or adjusted analyses based on covariates or propensity score. CONCLUSION: There does not appear to be a role for the anaesthetic protocol in the occurrence of persistent postsurgical pain. Other already well established hypotheses were confirmed. TRIAL REGISTRATION: ClinicalTrials.gov (ref. NCT00812734).

Persistent neuropathic pain after inguinal herniorrhaphy depending on the procedure (open mesh v. laparoscopy): a propensity-matched analysis.

BACKGROUND: A greater incidence of persistent pain after inguinal herniorrhaphy is suspected with the open mesh procedure than with laparoscopy (transabdominal preperitoneal), but the involvement of neuropathy needs to be clarified. METHODS: We examined the cumulative incidence of neuropathic persistent pain, defined as self-report of pain at the surgical site with neuropathic aspects, within 6 months after surgery in 2 prospective subcohorts of a multicentre study. We compared open mesh with laparoscopy using different analysis, including a propensity-matched analysis with the propensity score built from a multivariable analysis using a generalized linear model. RESULTS: Considering the full patient sample (242 open mesh v. 126 laparoscopy), the raw odds ratio for neuropathic persistent pain after inguinal herniorrhaphy was 4.3. It reached 6.8 with the propensity-matched analysis conducted on pooled subgroups of 194 patients undergoing open mesh and 125 undergoing laparoscopy (95% confidence interval 1.5-30.4, p = 0.012). A risk factor analysis of these pooled subgroups revealed that history of peripheral neuropathy was an independent risk factor for persistent neuropathic pain, while older age was protective. CONCLUSION: We found a greater risk of persistent pain with open mesh than with laparoscopy that may be explained by direct or indirect lesion of nerve terminations. Strategies to identify and preserve nerve terminations with the open mesh procedure are needed.

CONTEXTE: On soupçonne que l'incidence de la douleur persistante à la suite d'une hernioplastie inguinale est plus élevée avec la mise en place d'un filet par voie ouverte qu'avec la laparoscopie (transabdominale prépéritonéale), mais encore faut-il clarifier le rôle de la neuropathie. MÉTHODES: Nous avons mesuré l'incidence cumulative de la douleur neuropathique persistante, décrite comme une douleur au site opératoire accompagnée d'éléments neuropathiques déclarés par le patient dans les 6 mois suivant la chirurgie, auprès de 2 sous-cohortes prospectives d'une étude multicentrique. Nous avons comparé la mise en place d'un filet par voie ouverte et la laparoscopie à l'aide de différentes analyses, dont une analyse avec appariement des scores de propension, les scores de propension découlant d'une analyse multivariée générée à partir d'un modèle linéaire généralisé. RÉSULTANTS: En tenant compte de tout l'échantillon de patients (242 soumis à la mise en place d'un filet par voie ouverte c. 126 soumis à la laparoscopie), le rapport des cotes brut pour la douleur neuropathique persistante après l'hernioplastie inguinale était de 4,3. Il a atteint 6,8 à l'analyse par appariement des scores de propension réalisée auprès de sous-groupes réunis de 194 patients soumis à la technique ouverte avec treillis et 125 soumis à la laparoscopie (intervalle de confiance à 95 % 1,5­30,4, p = 0,012). Une analyse des facteurs de risque pour ces sous-groupes réunis a révélé que des antécédents de neuropathie périphérique constituaient un facteur de risque indépendant à l'égard de la douleur neuropathique persistante, tandis que l'avancée en âge a conféré un effet protecteur. CONCLUSION: Nous avons observé un risque plus élevé de douleur persistante associée à la mise en place d'un filet par voie ouverte qu'avec la laparoscopie, ce qui pourrait s'expliquer par des lésions directes ou indirectes aux terminaisons nerveuses. Des stratégies s'imposent pour identifier et préserver les terminaisons nerveuses lors de la mise en place d'un filet par voie ouverte.

Spatial heterogeneity of type I error for local cluster detection tests.

BACKGROUND: Just as power, type I error of cluster detection tests (CDTs) should be spatially assessed. Indeed, CDTs' type I error and power have both a spatial component as CDTs both detect and locate clusters. In the case of type I error, the spatial distribution of wrongly detected clusters (WDCs) can be particularly affected by edge effect. This simulation study aims to describe the spatial distribution of WDCs and to confirm and quantify the presence of edge effect. METHODS: A simulation of 40 000 datasets has been performed under the null hypothesis of risk homogeneity. The simulation design used realistic parameters from survey data on birth defects, and in particular, two baseline risks. The simulated datasets were analyzed using the Kulldorff's spatial scan as a commonly used test whose behavior is otherwise well known. To describe the spatial distribution of type I error, we defined the participation rate for each spatial unit of the region. We used this indicator in a new statistical test proposed to confirm, as well as quantify, the edge effect. RESULTS: The predefined type I error of 5% was respected for both baseline risks. Results showed strong edge effect in participation rates, with a descending gradient from center to edge, and WDCs more often centrally situated. CONCLUSIONS: In routine analysis of real data, clusters on the edge of the region should be carefully considered as they rarely occur when there is no cluster. Further work is needed to combine results from power studies with this work in order to optimize CDTs performance.

Does a sign restricting operating room access reduce staff traffic in the surgical department?

INTRODUCTION: Infections following orthopedic surgery are rare but difficult to treat. Among the prevention measures reviewed during the Musculoskeletal Infection Society's (MSIS) 2023 international consensus meeting, the only strategy to obtain 100% agreement was the control of traffic in and out of the operating room (OR). Although this recommendation makes good sense, to our knowledge, it has not been previously investigated in a comparative study. We, therefore, conducted a prospective, observational, before-and-after study of the implementation of an informational sign designed to limit traffic in and out of the OR to (1) determine its impact on door openings and the number of people present during orthopedic surgery and (2) assess the risk of surgical site infection after the institution of this sign. HYPOTHESIS: This type of sign reduces the number of door openings. MATERIALS AND METHODS: This prospective, observational study included all patients operated on in one of our ORs over a 6-week period. The number of entrances and exits from the OR and how long the doors were kept open were recorded during the entire study period. After 3 weeks, an informational sign was posted on the OR doors warning people that unnecessary traffic in and out of the OR increases the risk of infection. During this period, we also recorded the type of procedure, operative time, the number of people in the OR at the time of the incision, and the number of entrances and exits. Patients underwent a follow-up at 2 years to check for postoperative infection. The primary endpoint was the number of OR door openings, and the secondary endpoint was the number of infections at 2 years postoperatively. RESULTS: The 2 groups (before and after the implementation of the sign) were homogeneous. The average total number of door openings for all ORs was 28.9±19.6 [2-90]. In the no sign group, it was 33.3±20.9 [3-90], and in the sign group, it was 21.0±14.7 [2-50] (p=0.011). The maximum number of people in the OR at one time was 8.32±1.84 [4-12] in the no sign group and 8.44±1.98 [5-12] in the sign group (p=0.8). There were 3 postoperative infections at the 2-year follow-up, all occurring in the no sign group. The infection rate was 6.4% (3/47) in the no sign group versus 0% (0/25) in the sign group (p=0.197). DISCUSSION: Our prospective study demonstrated a simple strategy to reduce the number of entrances and exits, the number of people in the OR, and potentially the risk of surgery-related infection. Another larger-scale study is needed to assess the exact impact of this type of sign, particularly on the risk of infection. LEVEL OF EVIDENCE: III; prospective non-randomized comparative study.

Performance map of a cluster detection test using extended power.

BACKGROUND: Conventional power studies possess limited ability to assess the performance of cluster detection tests. In particular, they cannot evaluate the accuracy of the cluster location, which is essential in such assessments. Furthermore, they usually estimate power for one or a few particular alternative hypotheses and thus cannot assess performance over an entire region. Takahashi and Tango developed the concept of extended power that indicates both the rate of null hypothesis rejection and the accuracy of the cluster location. We propose a systematic assessment method, using here extended power, to produce a map showing the performance of cluster detection tests over an entire region. METHODS: To explore the behavior of a cluster detection test on identical cluster types at any possible location, we successively applied four different spatial and epidemiological parameters. These parameters determined four cluster collections, each covering the entire study region. We simulated 1,000 datasets for each cluster and analyzed them with Kulldorff's spatial scan statistic. From the area under the extended power curve, we constructed a map for each parameter set showing the performance of the test across the entire region. RESULTS: Consistent with previous studies, the performance of the spatial scan statistic increased with the baseline incidence of disease, the size of the at-risk population and the strength of the cluster (i.e., the relative risk). Performance was heterogeneous, however, even for very similar clusters (i.e., similar with respect to the aforementioned factors), suggesting the influence of other factors. CONCLUSIONS: The area under the extended power curve is a single measure of performance and, although needing further exploration, it is suitable to conduct a systematic spatial evaluation of performance. The performance map we propose enables epidemiologists to assess cluster detection tests across an entire study region.

Embolization and endothelial ablation with chitosan and sodium sotradecol sulfate: preliminary results in an animal model.

PURPOSE: To investigate whether embolization with chitosan hydrogel (CH) with or without a sclerosant (sodium tetradecyl sulphate, STS) can induce chemical endothelial ablation and prevent endothelial recanalization in a rabbit model. METHODS: Chitosan radiopaque thermogels were prepared using chitosan, ß-glycerophosphate, iopamidol, and different STS concentrations. Each auricular artery of 14 New Zealand White rabbits was cannulated and injected with 0.6 mL of chitosan (CH0; n = 14) on one side and either saline (n = 3), chitosan and 1% STS (CH1; n = 6), or chitosan and 3% STS (CH3; n = 6) in the contralateral side. Immediately after embolization and at 1, 7, 14, and 30 days, auricular artery patency and percentage of recanalization were assessed by visual inspection; microcirculation was evaluated using laser Doppler imaging (LDI). The rabbits were sacrificed at 30 days to assess endothelial ablation and inflammatory response by histological analyses. RESULTS: All arteries were catheterized and embolized with success. All saline-injected arteries rapidly recovered normal flow. The length of embolization was greater with CH3 than CH1 or CH0, regardless of the time observed (p<0.001). No difference in recanalization length was found among the gels (p = 0.07). Destruction of arterial wall was frequently observed independent of embolizing agent. Foreign body reaction was more frequent with CH3 as compared with CH1 and CH0 (p = 0.0070 and 0.0058, respectively). After 30 days, hypervascularization was observed on LDI only with CH0; it was attributed to intra- or perivascular neovessels and inflammatory response on pathological analysis. The vascular modifications appeared to be more homogenous across the length of embolization with CH3 than the other formulations. CONCLUSION: The viscosity obtained with chitosan and 3% STS permits better control during injection and longer vascular occlusion. These findings, combined with the intravascular neovascularization observed with CH0, led us to prefer the combination with STS.

High creatinine clearance in critically ill patients with community-acquired acute infectious meningitis.

BACKGROUND: A high dose of anti-infective agents is recommended when treating infectious meningitis. High creatinine clearance (CrCl) may affect the pharmacokinetic / pharmacodynamic relationships of anti-infective drugs eliminated by the kidneys. We recorded the incidence of high CrCl in intensive care unit (ICU) patients admitted with meningitis and assessed the diagnostic accuracy of two common methods used to identify high CrCl. METHODS: Observational study performed in consecutive patients admitted with community-acquired acute infectious meningitis (defined by >7 white blood cells/mm3 in cerebral spinal fluid) between January 2006 and December 2009 to one medical ICU. During the first 7 days following ICU admission, CrCl was measured from 24-hr urine samples (24-hr-UV/P creatinine) and estimated according to Cockcroft-Gault formula and the simplified Modification of Diet in Renal Disease (MDRD) equation. High CrCl was defined as CrCl >140 ml/min/1.73 m2 by 24-hr-UV/P creatinine. Diagnostic accuracy was performed with ROC curves analysis. RESULTS: Thirty two patients were included. High CrCl was present in 8 patients (25%) on ICU admission and in 15 patients (47%) during the first 7 ICU days for a median duration of 3 (1-4) days. For the Cockcroft-Gault formula, the best threshold to predict high CrCl was 101 ml/min/1.73 m2 (sensitivity: 0.96, specificity: 0.75, AUC = 0.90 ± 0.03) with a negative likelihood ratio of 0.06. For the simplified MDRD equation, the best threshold to predict high CrCl was 108 ml/min/1.73 m2 (sensitivity: 0.91, specificity: 0.80, AUC = 0.88 ± 0.03) with a negative likelihood ratio of 0.11. There was no difference between the estimated methods in the diagnostic accuracy of identifying high CrCl (p = 0.30). CONCLUSIONS: High CrCl is frequently observed in ICU patients admitted with community-acquired acute infectious meningitis. The estimated methods of CrCl could be used as a screening tool to identify high CrCl.

Does legislative framework favors prescription of physical activity in primary care ? The French experience.

OBJECTIVE: Regular physical activity (PA) is a key element in chronic disease management. We studied the effect of a recent legislative framework given to physical activity prescription (PAP) on practices, motivations, barriers, and needs for PAP in primary care among general practitioners (GP) of the Auvergne-Rhône-Alpes region, France. METHODS: Our cross-sectional survey used a self-administrated questionnaire through two recruitment methods: e-mail address (online group) and face-to-face (office group). Based on the data pertaining to demography, motivation scores, needs, and barriers, we analyzed the profiles of participating GPs. RESULTS: Among the 283 GPs, online participants (n = 250) were younger than office participants (n = 33) (46 ± 11 vs. 51 ± 12 years, p = 0.0083), and were physically more active (80% vs 51%, p = 0.0006). Regular PA was also critical in the profile of current prescribers (OR = 2.83 (95%CI [1.28, 7.00]), p = 0.015). The motivation score for PAP was high and equal in both groups (10.5 ± 3.3 in a maximum of 15), but multiple barriers emerged, which demonstrated age-dependent variations in the score. Young GPs mostly identified self-imposed barriers (exercise referral, PAP training), while for older GPs these barriers were equally attributable to patients. CONCLUSION: Although the legislative framework given to PAP in France was associated with a 12% increase in the number of prescribers, PA remains poorly prescribed in primary care, even among the most motivated physicians.

Hypersexuality and pathological gambling in Parkinson's disease: A cross-sectional case-control study.

BACKGROUND: Substance and behavioral addictions have already been described separately or in combination in Parkinson's disease. However, no comparisons of the prevalence of addictive behaviors in patients with Parkinson's disease and the general population have been published. The objective of this study was to compare the prevalence and characteristics of addictions (gambling, hypersexuality, tobacco, and alcohol) in patients with Parkinson's disease and in a matched, paired sample from the general population. METHODS: After matching for age, sex, and complete field questionnaires on addictions, we had 115 data sets. RESULTS: No difference was observed between Parkinson's disease and control populations concerning pathological gambling (0.87% vs 0.87%, P = .99), tobacco addiction (1.7% vs 1.7%, P = .99), and alcohol dependence (2.6% vs 3.5%, P = .71). The Parkinson's disease group showed 2 cases of sexual addiction (1.7% vs 0, P = .15). CONCLUSIONS: Our results indicate that patients with Parkinson's disease do not have specific profiles for tobacco or alcohol addiction and pathological gambling compared with the general population.

Anatomical location of effective deep brain stimulation electrodes in chronic cluster headache.

Deep brain stimulation of the posterior hypothalamus is a therapeutic approach to the treatment of refractory chronic cluster headache, but the precise anatomical location of the electrode contacts has not been clearly assessed. Our aim was to study the location of the contacts used for chronic stimulation, projecting each contact centre on anatomic atlases. Electrodes were implanted in a series of 10 patients (prospective controlled trial) in the so-called 'posteroinferior hypothalamus' according to previously described coordinates, i.e. 2 mm lateral, 3 mm posterior and 5 mm below the mid-commissural point. The coordinates of the centre of each stimulating contact were measured on postoperative computed tomography or magnetic resonance imaging scans, taking into account the artefact of the electrode. Each contact centre (n=10; left and right hemispheres pooled) was displayed on the Schaltenbrand atlas and a stereotactic three dimensional magnetic resonance imaging atlas (4.7 tesla) of the diencephalon-mesencephalic junction for accurate anatomical location. Of the 10 patients with 1-year follow-up, 5 responded to deep brain stimulation (weekly frequency of attacks decrease >50%). In responders, the mean (standard deviation) coordinates of the contacts were 2.98 (1.16) mm lateral, 3.53 (1.97) mm posterior and 3.31 (1.97) mm below the mid-commissural point. All the effective contacts were located posterior to the hypothalamus. In responders, structures located <2 mm from the centres of effective contacts were: the mesencephalic grey substance (5/5), the red nucleus (4/5), the fascicle retroflexus (4/5), the fascicle longitudinal dorsal (3/5), the nucleus of ansa lenticularis (3/5), the fascicle longitudinal medial (1/5) and the thalamus superficialis medial (1/5). The contact coordinates (Wilcoxon test) and the structures (Fisher's exact test) were not significantly different between responders and non-responders. These findings suggest that failure of deep brain stimulation treatment in cluster headache may be due to factors unrelated to electrode misplacement. They also suggest that the therapeutic effect is probably not related to direct hypothalamic stimulation. Deep brain stimulation might modulate either a local cluster headache generator, located in the hypothalamus or in the mesencephalic grey substance, or non-specific anti-nocioceptive systems.

Viability assessment of fresh and frozen/thawed isolated human follicles: reliability of two methods (Trypan blue and Calcein AM/ethidium homodimer-1).

PURPOSE: To assess the reliability of trypan blue (TB) and calcein AM/ethidium homodimer-1 (CaAM/EthD-1) staining to evaluate the viability of fresh and thawed human ovarian follicles. METHODS: Isolated follicles from fresh and thawed cortex were stained using TB versus CaAM/EthD-1 methods (n = 10 patients). Measurements were performed by two independent observers. The reliability was evaluated by intraclass correlation coefficient (ICC) and the differences between paired measurements were tested by the Wilcoxon test. RESULTS: Inter-observer reliability was excellent for each method. Nevertheless, it was even better with the TB method (ICC = 0.83) compared with CaAM/EthD-1 (ICC = 0.75). Moreover, the ICCs for viability measurements using the two methods were good for each observer (observer 1: ICC = 0.49; observer 2: ICC = 0.40). CONCLUSION: Compared with CaAM/EthD-1, TB appears to be more reliable as a staining method for follicle viability evaluation. TB staining is a quick and useful method, complementary to histological analysis for quality control in ovarian tissue cryopreservation.

Milk polar lipids favorably alter circulating and intestinal ceramide and sphingomyelin species in postmenopausal women.

BACKGROUNDHigh circulating levels of ceramides (Cer) and sphingomyelins (SM) are associated with cardiometabolic diseases. The consumption of whole fat dairy products, naturally containing such polar lipids (PL), is associated with health benefits, but the impact on sphingolipidome remains unknown.METHODSIn a 4-week randomized controlled trial, 58 postmenopausal women daily consumed milk PL-enriched cream cheese (0, 3, or 5 g of milk PL). Postprandial metabolic explorations were performed before and after supplementation. Analyses included SM and Cer species in serum, chylomicrons, and feces. The ileal contents of 4 ileostomy patients were also explored after acute milk PL intake.RESULTSMilk PL decreased serum atherogenic C24:1 Cer, C16:1 SM, and C18:1 SM species (Pgroup < 0.05). Changes in serum C16+18 SM species were positively correlated with the reduction of cholesterol (r = 0.706), LDL-C (r = 0.666), and ApoB (r = 0.705) (P < 0.001). Milk PL decreased chylomicron content in total SM and C24:1 Cer (Pgroup < 0.001), parallel to a marked increase in total Cer in feces (Pgroup < 0.001). Milk PL modulated some specific SM and Cer species in both ileal efflux and feces, suggesting differential absorption and metabolization processes in the gut.CONCLUSIONMilk PL supplementation decreased atherogenic SM and Cer species associated with the improvement of cardiovascular risk markers. Our findings bring insights on sphingolipid metabolism in the gut, especially Cer, as signaling molecules potentially participating in the beneficial effects of milk PL.TRIAL REGISTRATIONClinicalTrials.gov, NCT02099032, NCT02146339.FUNDINGANR-11-ALID-007-01; PHRCI-2014: VALOBAB, no. 14-007; CNIEL; GLN 2018-11-07; HCL (sponsor).

Temperature Rise Caused by Shear Wave Elastography, Pulse Doppler and B-Mode in Biological Tissue: An Infrared Thermographic Approach.

The aim of this study was to determine the interest in and relevance of the use of infrared thermography, which is a non-invasive full-field surface temperature measurement technique, to characterize the heterogeneous heating caused by ultrasound in biological tissue. Thermal effects of shear wave elastography, pulse Doppler and B-mode were evidenced in porcine tissue. Experiments were performed using a high-frequency echography Aixplorer system (Supersonic Imagine, Aix-en-Provence, France). For all three modes, ultrasound was applied continuously for 360 s while the temperature at the sample surface was recorded with a Cedip Jade III-MWIR infrared camera (Flir, Torcy, France). Temperature changes were detected for the three modes. In particular, "heat tunnels" crossing the sample were visualized from the early stages of the experiment. Heat conduction from the transducer was also involved in the global warming of the sample. The study widens the prospects for studies on tolerability, potentially in addition to classic approaches such as those using thermocouples.

Hospital and Population-Based Evidence for COVID-19 Early Circulation in the East of France.

BACKGROUND: Understanding SARS-CoV-2 dynamics and transmission is a serious issue. Its propagation needs to be modeled and controlled. The Alsace region in the East of France has been among the first French COVID-19 clusters in 2020. METHODS: We confront evidence from three independent and retrospective sources: a population-based survey through internet, an analysis of the medical records from hospital emergency care services, and a review of medical biology laboratory data. We also check the role played in virus propagation by a large religious meeting that gathered over 2000 participants from all over France mid-February in Mulhouse. RESULTS: Our results suggest that SARS-CoV-2 was circulating several weeks before the first officially recognized case in Alsace on 26 February 2020 and the sanitary alert on 3 March 2020. The religious gathering seems to have played a role for secondary dissemination of the epidemic in France, but not in creating the local outbreak. CONCLUSIONS: Our results illustrate how the integration of data coming from multiple sources could help trigger an early alarm in the context of an emerging disease. Good information data systems, able to produce earlier alerts, could have avoided a general lockdown in France.

Assessment of oro-dental manifestations in a series of acromegalic patients, the AcroDent study.

OBJECTIVE: The dental and periodontal impact of GH/IGF-1 hypersecretion has been poorly investigated until now. Our aim is to precisely describe the oro-dental state of acromegalic patients and to study the impact of GH/IGF-1 hypersecretion on patients' reported oral health-related quality of life (OHRQoL). METHODS: After collecting characteristics of their disease, acromegalic patients answered the GOHAI questionnaire assessing their OHRQoL, the AcroQoL questionnaire and then benefited from a complete stomatological and radiological examination (orthopantomogram systematically, retro-alveolar radiography or Cone Beam CT if necessary). RESULTS: In total, 29 patients aged 59.1 ± 16.0 years were included. The average DMFT index (sum of Decayed, Missing and Filled Teeth per patient) was 19.0 ± 7.8. 16/29 patients had a gingivitis and 18/29 a mild to moderate chronic periodontitis, but no case of severe chronic periodontitis was found, probably because the frequency of a protective thick gingival biotype was increased (9/29). No case of generalized gingival hypertrophy or diffuse hypercementosis was observed. According to the Add-GOHAI score, only 8/26 patients had a satisfactory OHRQoL. This parameter was correlated to the acromegaly-specific quality of life according to the AcroQoL score. Interestingly, 11/29 patients had bulky oral bony outgrowths (OBO), such as large maxillary or mandibular tori and multiple vestibular exostosis. CONCLUSIONS: The unsatisfactory OHRQoL reported by acromegalic patients contrasts with a rather good objective oro-dental state and annual oral examination seems relevant in this population. Finally, we report that huge OBO could be helpful signposts for the diagnosis of acromegaly.

Temperature Elevation in an Instrumented Phantom Insonated by B-Mode Imaging, Pulse Doppler and Shear Wave Elastography.

Diagnostic ultrasound is the gold standard for obstetric scanning and one of the most important imaging techniques for perinatal and neonatal monitoring and diagnosis. Ultrasound provides detailed real-time anatomic information, including blood flow measurements and tissue elasticity. The latter is provided through various techniques including shear wave elastography (SWE). SWE is increasingly used in many areas of medicine, especially in detection and diagnosis of breast, thyroid and prostate cancers and liver disease. More recently, SWE has found application in gynaecology and obstetrics. This method mimics manual palpation, revealing the elastic properties of soft biological tissues. Despite its rising potential and expanding clinical interest in its use in obstetrics and gynaecology (such as for assessment of cervical ripening or organ development and structure during pregnancy), its effects on and potential risks to the developing fetus remain unknown. Risks should be evaluated by regulatory bodies before recommendations are made on the use of SWE. Because ultrasound is known to produce thermal and mechanical effects, this study measured the temperature increase caused by B-mode, pulse Doppler (PD) and SWE, using an instrumented phantom with 11 embedded thermocouples. Experiments were performed with an Aixplorer diagnostic ultrasound system (Supersonic Imagine, Aix-en-Provence, France). As expected, the greatest heating was detected by the thermocouple closest to the surface in contact with the transducer (2.9°C for SWE, 1.2°C for PD, 0.7°C for B-mode after 380-s excitation). Both conduction from the transducer face and direct heating owing to ultrasound waves contribute to temperature increase in the phantom with SWE associated with a larger temperature increase than PD and B-mode. This article offers a methodological approach and reference data for future safety studies, as well as initial recommendations about SWE safety in obstetrics and gynaecology.

Subthalamic nucleus location: relationships between stereotactic AC-PC-based diagrams and MRI anatomy-based contours.

Subthalamic nucleus (STN) targeting is classically performed based on AC-PC probabilistic position. Nevertheless, MRI allows direct visualization and targeting. We aimed to compare the position localized on MR images with standard stereotactic diagrams. The STN was manually contoured on MR images (22 Parkinson's disease patients); boundaries were simplified in a schematic polygonal form. Front and lateral stereotactic diagrams were constructed according to Talairach and Benabid. We compared x, y and z coordinates of the geometrical center of MRI-based polygons and stereotactic diagrams (Wilcoxon matched-pairs tests). There was significant discordance between MRI-based polygons and AC-PC-based images. MRI shows the STN as more posterior, medial and slightly inferior.

Contact position analysis of deep brain stimulation electrodes on post-operative CT images.

PURPOSE: Groups performing deep brain stimulation advocate post-operative imaging [magnetic resonance imaging (MRI) or computer tomography (CT)] to analyse the position of each electrode contact. The artefact of the Activa 3389 electrode had been described for MRI but not for CT. We undertook an electrode artefact analysis for CT imaging to obtain information on the artefact dimensions and related electrode contact positions. METHODS: The electrode was fixed on a phantom in a set position and six acquisitions were run (in-vitro study). The artefacts were compared with the real electrode position. Ten post-operative acquisitions were analysed (in-vivo analysis). We measured: H (height of the lateral black artefact), D (distance between the beginning of the white and the lateral black artefacts) and W (maximal artefact width), representing respectively the lengths of the four contacts and the electrode tip and width of the contact zone. A Student t-test compared the results: in vivo vs in vitro and coronal vs sagittal reconstructions along the electrode. RESULTS: The limits of the lateral black artefact around the electrode contacts corresponded to the final electrode position. There was no significant difference for D (in vivo, 1.1 +/- 0.1 mm; in vitro, 1.2 +/- 0.2 mm; p = 0.213), while W and H differed slightly (in vivo, W = 3.3 +/- 0.2 mm, H = 7.7 +/- 0.2 mm; in vitro, W = 3.1 +/- 0.1 mm, H = 7.5 +/- 0.2 mm). Results obtained with sagittal and coronal reconstructions were similar (p > 0.6). CONCLUSIONS: Precise three-dimensional (3D) localisation of the four-contact zone of the electrode can be obtained by CT identification of the limits of the lateral black artefact. The relative position of the four contacts is deduced from the size of the contacts and the inter-contact distance. Sagittal and coronal reconstructions along the electrode direction should be considered for the identification of the four electrode contacts. CT offers a useful alternative to post-operative MRI.