Friday, July 13, 2018

Week 5: Vascular Grafts, Genetic Disorders, and Sequencing Technology


Starting off this week, I spent a day working on my project related to Bloom’s Syndrome. Beyond that however, I got an amazing opportunity to witness a grafting surgery for a patient with a tumor in their mouth. I have to say that television and the movies get these surgeries wrong. First, the lighting in these rooms is way better than depicted on screen. Second, the surgeons are a lot calmer in this setting than I have ever expected. Listening to rock music and making jokes is not what you would think is part of the surgery process. I will now describe the entire all-day process from the moment I stepped in the OR with my maroon scrubs, head cap, and face mask.

Walking into the OR, the room is slightly chaotic as the patient lies in the middle of the room in pain. The doctors must sedate him carefully through his nose (due to the tumor being in his mouth). The massive tumor was visibly protruding from the inside of their cheek to the gumline. I was informed that it would be removed with a good chunk of surrounding tissue. It was unclear whether this was benign or malignant, but either way, you could tell this patient was in pain. Once he was asleep, the feeding tube was inserted and pulled through the stomach to prevent tubing in the mouth. The doctors then proceeded to put on the radio and begin their long day. Removing a tumor in the mouth is a very delicate process that leaves a giant gaping hole from the inside of the mouth down to the neck. To fill that hole, a tissue graft from the forearm was surgically removed using heated tweezers that would just snip away at the fat and skin tissue. The tissue would be pulled back until veins and arteries attached to them would come into view. These were then cut from the forearm to provide an entire vascular graft that would be inserted into the mouth. One of the more awesome visuals was seeing tendons and muscles that were alive in the body just in their proper place but fully exposed. The next step involved putting skin from the thigh (a small layer) onto the forearm to cover the exposed tissues. This would help the forearm repair itself from the inside out. By far the most interesting part of the surgery was the vascularization of the newly implanted graft. The surgeons used a microscope to catch every detail of the veins and arteries they need to attach and suture together. Once this was done, the blood would rush back in and you could see it was like any other vein flowing through the body. After they closed the neck, I left that surgery in awe of what we could do to repair the body using its own parts and how we are pretty much like a well-oiled machine.

After that experience, I spent the rest of the week back in genetics learning more about dysmorphisms and developmental delays in genetic disorders. Genetic disorders come in a wide variety of symptoms and visual cues. They are often way subtler than what Google shows. For worried parents to be who go through in vitro fertilization, there is an option to discover hereditary genetic disorders called pre-implantation genetic diagnosis (PGD). PGD checks for any embryos that carry inheritable genetic disease and this allows for viable embryos to be implanted into the uterus that do not carry any marker for the genetic disorder being screened. This is, of course, limited to a known genetic disorder in one of the parents. However, there are concerns that technology like this and genome sequencing could have ethical ramifications. This discussion is always ongoing as the philosophy of our society grows with the advancement of such technologies. Questions that are often asked when something new like sequencing and screening arise are how this affects people’s information or to what end could this technology could be used against people. Being on the clinical end of this type of work clearly shows the concerns that both clinicians and patients can have with such tools, but advancement is mostly optimistic since these conversations are often very open and respectful to patients.

So far, this week has been an interesting experience on both the clinical and philosophical level and I have thoroughly enjoyed it.

No comments:

Post a Comment