The answer is nuanced
Venography assessment includes rats having a full presentation of collaterals (i.e., presentation of pterigopalatinal veins and nasal veins and presentation of the ophthalmic vein, angularis vein, facial anterior and posterior vein, and facial vein, or through cerebri superior veins, sinus cavernosus, sinus petrosus superior and inferior, sinus transversus, through jugular external vein, subclavia vein through superior caval veins after venography into the superior sagittal sinus
Textbook of Clinical Periodontology
Beyond that, the head-to-head study against tirzepatide and the REDEFINE 3 cardiovascular trial are both ongoing and expected to deliver readouts through 2026 and 2027
Common causes include: injecting air into the vial during mixing, shaking instead of gently swirling, or using non-sterile bacteriostatic water