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Hi
You did endoscopic biopsies. No real way they could perforate the intestines that way. If you had done full thickness surgical biopsies, then it could happen, but that doesn't happen often. And you have been seeing a specialist, right?
When endoscopic biopsies are done, the cat is put under general anesthesia. They are intubated with an endotracheal tube and placed on gas anesthesia mixed with oxygen. Once the cat is at a good plane of deep anesthesia, then the endoscope is put down the throat and the upper GI tract is visualized on a screen that is linked to the endoscope camera. Once all that is reachable via the mouth, then biopsies are taken. They are taken by putting a long wire with a spring-loaded claw on the end that is controlled by a technician squeezing the handle in order to grab little pieces of the inner lining of the duodenum, after each biopsy is obtained the claw grabber is pulled out and the sample is placed on a flat wooden stick and placed into a jar with formula. Three samples are obtained each from the Duodenum, The Jejunum and the Illiam.
I worked for a large specialty group and spent 9 years working for the internal medicine department. We did several endoscopies a week. In my experience it always took a while, so the patient had to be under anesthesia for a while. Often with suspect IBD, lymphoma, or anything that might make the patient not want to eat, we would place an esophageal feeding tube. This would only add about 2 minutes onto the procedure. The doctor was extremely experienced and was fast and accurate with his tubes. I would never trust any doctor to place a feeding tube that wasn't a specialist with massive experience doing it.
Anyway, the reason for the information above is to explain that I don't think there could be anyway for a perforated gut in your cat. But anesthesia is hard on them and can leave some effects that last longer than would be expected. Stress can also cause things that are lying dormant to wake up.
I am posing a link to a veterinarian information page regarding intestinal biopsies.
www.veterinarypracticenews.com
It won't copy as a link. but if you copy and paste in your search bar it should come up.
I will say that I didn't do any biopsies on my own cat. I just did an abdominal ultrasound with an experienced cat doctor that had better equipment than the specialists and she did massive continuing education on ultrasound. I started my can on Chemo (Chlorambucil) and Prednisolone as well as other medications, based on the thickened intestinal walls and the enlarged lymph nodes in the abdomen. Of course, I could do this because I work for a vet.
My choice was that I was fearful of the stress on her. She was already under weight and not feeling well. She has multiple other issues. Most veterinary literature will disagree with this because there are no biopsy results. But honestly, severe IBD and small cell GI lymphoma are treated very much the same. Of course, I also may regret my decision later on.
Whenever a veterinarian recommends diagnostics, always ask them what information will be gained with the diagnostic, and how the results will affect treatment, sometimes they are following a gold standard that they have been taught, and sometimes they are really needing to know these things because it will alter treatment. Most importantly ask questions and expect answers. I know veterinarians are stressed out right now. But so are people with sick animals. Once you are under the care of a veterinarian, they need to be able to answer questions and still make some time for you, even if you are not there. This may come through their technician, but they still need to help you and be involved especially when you have just had a big procedure done.
Sorry for the massive post on your thread. Just trying to help.
You did endoscopic biopsies. No real way they could perforate the intestines that way. If you had done full thickness surgical biopsies, then it could happen, but that doesn't happen often. And you have been seeing a specialist, right?
When endoscopic biopsies are done, the cat is put under general anesthesia. They are intubated with an endotracheal tube and placed on gas anesthesia mixed with oxygen. Once the cat is at a good plane of deep anesthesia, then the endoscope is put down the throat and the upper GI tract is visualized on a screen that is linked to the endoscope camera. Once all that is reachable via the mouth, then biopsies are taken. They are taken by putting a long wire with a spring-loaded claw on the end that is controlled by a technician squeezing the handle in order to grab little pieces of the inner lining of the duodenum, after each biopsy is obtained the claw grabber is pulled out and the sample is placed on a flat wooden stick and placed into a jar with formula. Three samples are obtained each from the Duodenum, The Jejunum and the Illiam.
I worked for a large specialty group and spent 9 years working for the internal medicine department. We did several endoscopies a week. In my experience it always took a while, so the patient had to be under anesthesia for a while. Often with suspect IBD, lymphoma, or anything that might make the patient not want to eat, we would place an esophageal feeding tube. This would only add about 2 minutes onto the procedure. The doctor was extremely experienced and was fast and accurate with his tubes. I would never trust any doctor to place a feeding tube that wasn't a specialist with massive experience doing it.
Anyway, the reason for the information above is to explain that I don't think there could be anyway for a perforated gut in your cat. But anesthesia is hard on them and can leave some effects that last longer than would be expected. Stress can also cause things that are lying dormant to wake up.
I am posing a link to a veterinarian information page regarding intestinal biopsies.

How best to obtain intestinal biopsies
Indications for intestinal biopsies can range from chronic vomiting and diarrhea to weight loss and even hypoproteinemia.
It won't copy as a link. but if you copy and paste in your search bar it should come up.
I will say that I didn't do any biopsies on my own cat. I just did an abdominal ultrasound with an experienced cat doctor that had better equipment than the specialists and she did massive continuing education on ultrasound. I started my can on Chemo (Chlorambucil) and Prednisolone as well as other medications, based on the thickened intestinal walls and the enlarged lymph nodes in the abdomen. Of course, I could do this because I work for a vet.
My choice was that I was fearful of the stress on her. She was already under weight and not feeling well. She has multiple other issues. Most veterinary literature will disagree with this because there are no biopsy results. But honestly, severe IBD and small cell GI lymphoma are treated very much the same. Of course, I also may regret my decision later on.
Whenever a veterinarian recommends diagnostics, always ask them what information will be gained with the diagnostic, and how the results will affect treatment, sometimes they are following a gold standard that they have been taught, and sometimes they are really needing to know these things because it will alter treatment. Most importantly ask questions and expect answers. I know veterinarians are stressed out right now. But so are people with sick animals. Once you are under the care of a veterinarian, they need to be able to answer questions and still make some time for you, even if you are not there. This may come through their technician, but they still need to help you and be involved especially when you have just had a big procedure done.
Sorry for the massive post on your thread. Just trying to help.