Main pulmonary artery diameter related to pneumonia severity.

The diameter (mPAD) of the main pulmonary artery (pulmonary artery trunk) is a crucial indicator for cardiovascular health and prognoses in various conditions. Its enlargement is associated with increased mortality and severity in COVID-19-related pneumonia. However, its relevance to non-COVID pneumonia remains uncertain.

Hyaluronic Acid Embolism Treated with Subcutaneous High and Low Hyaluronidase Doses: Efficacy and Surrounding Tissue Effect.

Background: The use of hyaluronidase in hyaluronic acid vascular occlusion has been evaluated; however, the models used do not accurately assimilate the facial morphologic characteristics or study the effects on adjacent tissues. The purpose of this study was to determine an effective concentration of subcutaneous hyaluronidase to dissolve a hyaluronic acid embolism and its effect on surrounding tissue.

Methods: Fifteen rabbits were divided into six groups.

Comparison of suturing models: the effect on perception of basic surgical skills.

Background: Acquisition of Basic Surgical Skills (BSS) are essential for medical students. The objective was to determine it's fidelity impact.

Methods: Using four suturing models (SM) (pigskin, sponge, commercial pad, and orange), SM-quality and student-SM interaction were evaluated.

Schwann Cell Precursor Transplant in a Rat Spinal Cord Injury Model.

Background: Differentiation of mesenchymal stem cells into Schwann cell precursors could reverse established lesions and sequelae of medullary transection.

Objective: The objective of this study was to study the clinical response of mesenchymal stem cell transplantation with Schwann precursor cell transplantation in a rat spinal cord injury model, using motor function and histopathologic studies.

Materials And Methods: A total of 28 Sprague-Dawley rats were randomly divided among four groups (n = 7 in each): sham group, control group, mesenchymal stem cell transplant group, and Schwann cell precursor transplant group.

[Study of peripheral nerve injury in trauma patients].

Objective: To determine the prevalence, location, mechanism, and characteristics of peripheral nerve injury (PNI) in trauma patients.

Material And Methods: A retrospective study of medical records with PNI diagnosis secondary to trauma in the period of 2008-2012. The following information was collected: gender, age, occupation, anatomic location, affected nerve, mechanism of injury, degree of injury, costs, and hospitalization time.

Near-peer teaching strategy in a large human anatomy course: perceptions of near-peer instructors.

Near-peer teaching (NPT) is a strategy in which senior students assume the instructor role with junior peers (mentees). Senior students develop unique skills and knowledge through NPT, an experience which extends their learning beyond content mastery. Different teaching modules featuring NPT were utilized in the human anatomy course at the School of Medicine, Autonomous University of Nuevo Leon in Monterrey, Mexico.

Age- and gender-related variations in morphometric characteristics of thoracic spine pedicle: A study of 4,800 pedicles.

Transpedicular spinal fusion is the most commonly used fixation technique for the surgical treatment of vertebral disorders. However, the instrumentation of the thoracic spine using this technique continues to be controversial. The objective of the present study was to determine the morphometric characteristics of the thoracic pedicle and to establish how these characteristics vary with gender and age.

[Study of the vascular morphology of the lower limb nerves used as grafts].

Introduction: The placement of a vascularized nervous graft is an option for acute nervous injuries treatment, as this has demonstrated a longer viability.

Objective: To carry out a macroscopic and microscopic analysis of the vascularity of the main lower limb nerves used as vascularized nervous grafts.

Materials And Methods: It was followed out a descriptive, transversal and non-comparative study to analyse the saphenous, the sural, the deep peroneal and the superficial peroneal nerves vascularity.

Modification of the technique for subclavian-vein catheterization.

Introduction: In invasive monitoring, subclavian-vein puncture is a routine procedure indicated for central vein cathe-terization. It is indicated in patients according to hospital stay, including the administration of drugs and the treatment of chronic and cardiac disease. The techniques described to date include infraclavicular percutaneous puncture; others place catheters using angiographic methods, and the use of magnetic resonance imaging and ultrasound has also been reported.