The mucous cyst, a rare and delayed complication after rhinoplasty

Rhinoplasty is frequently performed worldwide, and patients and surgeons both expect good cosmetic results without any deformity recurrence. We report a rare case of mucous cyst occurred after post-traumatic rhinoseptoplasty. Observation A 27-year old woman presented a median mass of the nose root 7 years after prior rhinoseptoplasty. Investigations showed a subcutaneous lesion of 10.5 × 24.5 mm. The surgery consisted on an external rhinoplasty allowing cyst removal, bilateral osteotomies and reconstruction of the nasal dorsum by deep temporal fascia graft. Histological examination confirmed the diagnosis of begnin mucous cyst. No recurrence was observed at 1-year follow-up. Discussion Mucous cyst post rhinoplasty is rare and is probably due to accidental mucosal material implantation into the subcutaneous plane during rhinoplasty. This complication can be avoided by adequate infiltration and hydrodissection, careful dissection, and avoidance of unnecessary trauma during osteotomies

Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.

PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks

Elective cancer surgery in COVID-19-free surgical pathways during the SARS-CoV-2 pandemic: An international, multicenter, comparative cohort study

PURPOSE As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19–free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19–free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19–free surgical pathways. Patients who underwent surgery within COVID-19–free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19–free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score–matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19–free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION Within available resources, dedicated COVID-19–free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks

Fatty acid composition of french butters, with special emphasis on conjugated linoleic acid (CLA) isomers

International audienc

Variations saisonnières et régionales des taux d'acides linoléiques conjugués dans les beurres français

National audienc

Variations saisonnières et régionales des taux d'acides linoléiques conjugués dans les beurres français

National audienc

Leidenfrost drops on a liquid substrate: theory and experiments

The Leidenfrost effect is studied for drops on a superheated yet non-volatile liquid pool, and contrasted with the more classical situation implying a solid substrate. Experiments reveal the absence of a critical superheat for drops to “levitate” over the roughness-free liquid surface, even when the latter is significantly deformed (i.e. for large drops). Inspired from a previous work, a theoretical model is presented which compares fairly well to experiments without any fitting parameter. Contrary to the case of a solid substrate, the vapor film here does not appear to form chimneys, even for large drops. The evaporation dynamics is also studied, and scaling laws are discussed versus classical ones.info:eu-repo/semantics/publishe

Leidenfrost drops on liquid baths :experiments

In the Leidenfrost effect, a liquid drop stands above a very hot substrate and levitates over a bed of its own vapor. Recently, the use of these drops has shown rather interesting possibilities, and better understanding of this effect thus appears necessary. Roughness generally leads to an increase of the Leidenfrost temperature. Therefore, the idea of our work is to use the smoothest substrate possible: a liquid bath. Indeed, we observed stable Leidenfrost drops with superheat (difference between the temperature of the bath and the boiling temperature of the drop's liquid) down to 1°C. This remarquable behavior has been seen notably for ethanol drops on silicon oil baths. However, the viscosity of the liquid of the bath seems to play an important role as no ethanol drop can be in the Leidenfrost state over high viscosity baths (kinematic viscosity µ~200cSt). This may be due to local cooling of the substrate under the drop. We also investigate the evaporation of these drops, and find scalings markably different from those applying in the case of a solid substrate. We also observe that the drop can enter in contact with the bath before its complete evaporation if the temperature is not high enough.info:eu-repo/semantics/publishe