[Acute airway obstruction from a retropharyngeal hemorrhage].

A case is reported of a man in his 70s that presented to the emergency department due to difficulty swallowing after a fall. He was found to have a large retropharyngeal hematoma, which led to complete airway obstruction about an hour after the injury. As oral endotracheal intubation was impossible due to the bleeding, an emergency cricothyrotomy was performed in an ambulance by an emergency medicine trainee.

Synergistic effect of ligand-cluster structure and support in gold nanocluster catalysts for selective hydrogenation of alkynes.

In the field of nanocluster catalysis, it is crucial to understand the interplay of different parameters, such as ligands, support and pretreatment and their effect on the catalytic process. In this study, we chose the selective hydrogenation of phenylacetylene as a model reaction and employed two gold nanoclusters as catalysts, the phosphine protected Au and the thiolate protected Au, each with different binding motifs. They were supported on MgO, AlO and a hydrotalcite (HT), chosen for their different acidity.

Proof-of-Concept for Long-Term Human Endometrial Epithelial Organoids in Modeling Menstrual Cycle Responses.

Endometrial disorders, such as infertility and endometriosis, significantly impact reproductive health, thus necessitating better models to study endometrial function. Current in vitro models fail to replicate the complexity of the human endometrium throughout the entire menstrual cycle. This study aimed to assess the physiological response of human endometrial organoids (hEOs) to in vitro hormonal treatments designed to mimic the hormonal fluctuations of the menstrual cycle.

Biopsy vitrification: New tool for endometrial tissue cryopreservation for research applications.

Patient-derived endometrial biopsies serve as a crucial source for molecular studies, highlighting the necessity for tissue cryopreservation methods that preserve cell viability and tissue morphology with minimal to no impact. The passive slow freezing (PSF) protocol has demonstrated efficacy for cryopreserving endometrial biopsies, allowing for the subsequent isolation of viable epithelial and stromal cells. Vitrification (VT) enables the avoidance of ice crystal formation and could therefore potentially prevent mechanical injury to tissues.