Daming: The system rejected my request for salted fish

Chapter 1195

While speaking, Wei Wu continued to prepare for the second step, and at the same time did not forget to instruct Xu Da:

"Uncle Xu, please give me your other hand."

Xu Da nodded without saying anything and stretched out his other arm in front of Wei Wu.

Wei Wu then used the ear pick to scoop out a little more powder from the capsule and mixed it with water.

However, this time it was not just one drop of water, but a few more drops were added to make the water and medicine powder into a suspension with a slightly higher concentration.

The so-called suspension is a mixture of small solid particles in a liquid, but the solid and liquid are not miscible.

After doing this, Wei Wu turned to look at Doctor Xu and said:

"Disinfect the silver needle first."

Upon hearing this, Doctor Xu immediately took out alcohol and medical cotton balls and carefully disinfected the silver needle.

After making preparations, Wei Wu pointed at Xu Da's outstretched hand and said:

"Use a silver needle to gently make a one-centimeter mark on the inside of your forearm... well, about this long."

Wei Wu wanted to say the length directly, but suddenly remembered that Doctor Xu was not from the Academy of Science and Technology and might not be familiar with this unit.

So he used his fingers to measure the approximate length and continued:

"Remember, it's just a tiny scratch on the skin. The standard is no bleeding or very slight bleeding. Is that okay?"

"Of course, no problem. I've been playing with needles all my life."

Doctor Xu gave Wei Wu a displeased look, then raised his hand and drew a mark on the inside of Xu Da's forearm.

I have to say that this guy is really good at it. The precision of his technique can only be described as perfect.

Then Wei Wu picked up the suspension he had just prepared and dripped the liquid onto the dissolved scar.

"Just like before, wait for an incense stick of time and observe whether the medicine has any reaction on Mr. Xu's wound."

"If there's no red halo around the scratch, there's no pseudopodia, which would appear as red threads that look like spider legs."

Speaking of pseudopodia, Wei Wu made sure that Doctor Xu could understand, and he specifically explained what pseudopodia meant.

After finishing the explanation, he continued:

"There is also swelling. If these symptoms are not present, then the result can be confirmed to be negative."

"But if there is obvious redness, pseudopodia and local itching around the scratch, the result can basically be determined to be positive."

Although Wei Wu's approach is tedious and complicated, it has to be admitted that it is the lowest-risk testing method.

Antibiotic allergy is no joke. If you are not careful, it may lead to anaphylactic shock, which can definitely be fatal in this day and age.

Therefore, testing must be done step by step, which just takes more time, but at least it will not kill the patient.

Soon, thirty minutes passed, and Wei Wu and Doctor Xu kept observing whether there were any changes around the scratches.

Fortunately, Xu Da did not have any obvious allergic reaction, so they could proceed to the last step, which was also the riskiest step.

Wei Wu took out a syringe from the system warehouse, and then took out one-tenth of the powder from the amoxicillin capsule.

Then he took out a bag of 0.9% sodium chloride injection and used a syringe to draw out one to two milliliters and mix it with the medicine powder.

After thorough stirring, an extremely dilute test liquid was prepared, and then the syringe containing the test liquid was handed to Doctor Xu.

Doctor Xu took it and looked at it carefully, then looked at Wei Wu and asked.

"Is this the syringe you told me about before, the one used to inject drugs into the human body?"

"That's right!"

Wei Wu responded affirmatively, and then continued:

"I can't use this thing, but you've been playing with needles your whole life, so you should be fine. So I'll have to leave the injection to you."

"But remember, don't inject into the meridians. Just gently and horizontally penetrate just below the epidermis. Don't go too deep."

"After piercing the skin, slowly inject it until a small bump appears on the skin, roughly the same size as a mosquito bite."

Following Wei Wu's instructions, Doctor Xu was not nervous and directly picked up the syringe and started to perform the operation on Xu Da's hand.

I have to admit that Doctor Xu has a very good grasp of the insertion of the needle, but his technique is a little unfamiliar.

But this is not a big deal. Although it is a little slow, it is finally done according to Wei Wu's requirements.

"We have to wait another stick of incense, right?"

After the injection was completed, Doctor Xu said this without waiting for Wei Wu to speak. He had learned to answer quickly.

Wei Wu laughed heartily and nodded immediately, saying:

"That's right. If the mound remains unchanged, red and swollen, and the surrounding skin doesn't flush within one stick of incense, it's negative."

"But if the pimples get bigger, become red and swollen, or if there are lumps and itching, then it's a positive test."

"Also, this isn't a superficial test anymore. Although it didn't go very deep, the liquid did enter the test subject's body."

Hearing Wei Wu's words, Doctor Xu immediately became serious. He knew that what Wei Wu was going to say next was very important.

So after putting down the syringe, he immediately picked up his little book and started recording.

And Wei Wu continued to say:

"If the test subject experiences itching on the palms, soles, armpits, and groin, and also has symptoms of urticaria on the skin."

"If there are also symptoms such as chest tightness, shortness of breath, palpitations, dizziness, nausea, and numbness of the lips and tongue, it means that the tester is highly allergic."

Wei Wu and Doctor Xu were talking about medical issues as if no one else was around, and they were quite focused.

Just like before, Zhu Yuanzhang, Zhu Biao and others did not disturb him, after all, it was related to Xu Da's recovery.

But just as the two continued their conversation, Xu Da, who was lying on the bed, suddenly spoke.

"Gentlemen, if nothing unexpected happens, I think I should have what you call a positive allergic reaction."

Upon hearing this, Wei Wu and Doctor Xu were shocked and quickly turned to look at Xu Da.

But he found that Xu Da was pointing at the place where he was doing the skin test.

"This Pichu is a little bigger than before, and there's a red blush around it. Also, I feel really itchy here."

Xu Da's feedback directly silenced Doctor Xu. If penicillin could not be used, it would be very difficult to cure the disease.

But at this moment, Wei Wu spoke.

"It seems that penicillin is useless, and vancomycin is the only option!"