"Feifan, find me the real reason for this finger’s necrosis!"
Yan Feifan heard this, then glanced at the dark gray left index finger, severed at the base and sealed in a bag, that Chen Yu had handed him.
He couldn’t help but remind her, "Mrs. Yu, I’m not a forensic examiner."
"Isn’t it a bit inappropriate for me to be the one to find the cause?"
Chen Yu said in a low voice, "You have a high level of surgical skill and a detailed understanding of human anatomy. You can find the cause quickly."
"If you record it objectively and fairly, and document the evidence properly, no one will question it if this really goes to an incident review or a lawsuit."
Her gaze sharpened, and she added impatiently, "I’ll take responsibility for any problems that arise."
"Stop dawdling and get to it."
Yan Feifan obediently agreed, took the sealed bag with the severed finger, and left the director’s office.
He went to a laboratory on the third floor.
Yan Feifan first set up two recording cameras on either side, then laid out a set of surgical instruments needed for dissecting the finger.
At 1:33 PM, once everything was ready, Yan Feifan faced the camera and formally stated the current time, location, and the task he was about to perform.
Then, he picked up a scalpel and began the dissection of the severed finger.
Organ necrosis has two main causes: ischemia and infection.
From Yan Feifan’s initial visual analysis of the severed finger, he deduced the cause was ischemia.
However, to avoid letting overconfidence cause him to miss other possibilities, Yan Feifan strictly followed the procedures for a forensic dissection, proceeding meticulously step by step.
The skin of the severed finger was completely peeled away.
Yan Feifan examined it, and after finding no suspicious issues, placed it on a metal tray to the side.
Next was the removal of fat and muscle...
During the dissection, Yan Feifan naturally focused on the suture site of the finger’s wound.
The muscle healing at the wound showed some adhesion and misalignment, but not to a significant degree.
Although Yan Feifan wanted to shake his head at the quality of this wound treatment, an objective evaluation would be that it was just barely passable.
All the fat was removed, and most of the muscle was peeled back, clearly exposing the blood vessels and nerves.
Yan Feifan then carefully examined the vascular suture site on the healed wound. The twisted shape of the blood vessel made him frown, and anger flared up.
’That son of a bitch didn’t even try to suture it properly.’
During vascular anastomosis, after aligning the vessels, the tension on each suture must be uniform.
Otherwise, uneven tension from the sutures will gradually release torsional stress on the suture line, causing the soft blood vessel to twist and deform, which in turn affects blood circulation.
By Mrs. Yu’s standards, she wouldn’t let a student take on a surgery beyond their skill level if they weren’t qualified.
This could only mean that whoever did this was careless when treating the chef’s finger injury.
However, this degree of vascular torsion would only somewhat impede blood circulation, not enough to cause necrosis.
The real cause had yet to be found...
When Yan Feifan had completely dissected a slender digital vein, with an average diameter of about 0.4 millimeters, he finally found the culprit behind the finger’s necrosis.
The vein was blocked by a small bulge.
He cut open the small bulge on the vein and found a tiny black particle.
After rinsing it with saline, Yan Feifan discovered it was a tiny, irregular, grayish-white bone fragment.
He placed the small particle under a microscope for observation.
Judging by the internal structure of the tiny bone chip, Yan Feifan determined it was not human bone.
As for whether it was pig, chicken, or fish bone, that would require further testing.
However, that test was no longer necessary.
Yan Feifan had found the cause of the patient’s finger necrosis, completed the relevant evidence documentation, and cleaned up the operating table.
Afterward, he found Mrs. Yu and gave her a detailed report.
Chen Yu held the sealed bag up to her eyes, carefully examining the tiny bone fragment that you had to squint to see clearly.
"So you’re saying there was a problem during debridement and irrigation, which allowed this unknown bone fragment to enter a blood vessel in the finger?"
Yan Feifan nodded. "This blockage, found in the vein, most likely originated from a problem during the irrigation."
Chen Yu was silent for a moment, then asked, "And your assessment of the quality of the wound treatment?"
Yan Feifan said bluntly, "The level of treatment is barely passing. The attitude and care demonstrated are failing."
Chen Yu let out a soft sigh. "I see."
She continued, "Feifan, that’s all for this afternoon. You can go take care of your own things."
Yan Feifan said, "Oh," and turned to leave, but after a couple of steps, he turned back.
"Mrs. Yu, the twins who need the leg and hand transplant will arrive at the Affiliated Hospital tomorrow evening..."