Tiger26 said:
So what's the deal with this dog lab anyway? I've only heard vague references to it, so I'm kinda curious about what it's all about.
The dog lab is a lab for the physiology class. You are basically observing different cardiovascular control mechanisms.
A basic rundown: The experiment is performed on a medium to large sized dog which has been fully anesthetized before the students arrive. You cannulate both femoral arteries to measure pressure of the left ventricle and systemic pressure. You also cannulate a femoral vein for drug infusion. Also, the carotid arteries and vagus nerves are exposed in the neck. Finally, the chest is opened, and you can observe the heart beating and feel the force of it's contractions. Various experiements are performed with vagus nerve stimulation, occluding of venous return to the heart, and infusion of different drugs like atropine, norepinephrine, etc. Near the end you stimulate ventricular fibrillation (bad heart rhythm) and attempt to defibrillate. The dogs are ultimately sacrificed. Every effort is made to ensure the dogs remain under deep anesthesia the whole time. All in all you spend about 4-5 hours working on a dog.
MCW is one of the few schools that still performs this lab every year. The lab is optional, and your grades will not suffer for not showing up, but you are responsible for the concepts the lab covers on the exam. They provide time a few days before the lab to discuss ethical and moral issues and let us make up our own minds as to if we want to participate. They say that a live animal lab is still used because students continually rate it very highly, and that the variability you see in live subjects can't be reproduced by a computer simulation. They make it a point to mention that these dogs were already "scheduled" for euthanisia for one reason or another, and that they would be killed whether the lab was performed or not.
The lab itself, considering the implications of the use of dogs, is VERY well organized. Every single group (about 4 students) has a professor/faculty and a PhD or MD/PhD student with them at all times. You will always know what's going on and what to do next, unlike other labs I've had in undergrad and med school.
I have not yet heard any of my peers say the lab wasn't useful or very good. Personally I think it was very intersting, but beyond that I don't think it helped me learn the concepts any more than lecture or a computer simulation would. I won't lie that the surgical procedures we performed were very exciting, however. It's just something you have to think about for yourself. I'm still not exactly sure how I feel about what went on. It was a very interesting contrast to go from working with dead tissues last semester to living tissue this semester.
I'd be happy to answer any other questions about this lab either on here or via private messages.