The sun is in the sky, and the heat wave is blowing.

Ji and Dabao took the new sunhat knitted by the fifth grandfather himself, and sent it to the ground with a rice basket and a water jug.

Fortunately, there was a dry trench at the head of the field, and there happened to be a few old trees with a lush crown next to the trench to provide shade.

Ji Chao shouted a few times at the people who were bending down to cut wheat in the field.

Widow Xie was close, and when she heard it, she beckoned Hu Liang and Hu Dacheng, put down her sickle and walked towards this side.

The three of them wore the same large wide-brimmed sunhats as the season, which looked much better than before, and the most important thing was that they were lightweight.

The idea was naturally given to the fifth grandfather by Ji, and the fifth grandfather was ingenious, and he changed it with clever ideas, and then he had this new sunhat.

The sunhats were very popular as soon as they were introduced, and those that were delivered to the shops in town were quickly sold out of stock.

However, even if he urged again, the fifth grandfather still followed the villagers of Dafeng Village first, and the money was cheaper than that in the town, so he charged a symbolic material fee, and the Ji and Hu families gave it for free.

"Miss, your hat has saved my life, otherwise I would really burn to death."

Hu Dacheng sat on the ground with his buttocks, leaning on the trunk of the tree half-dead, not wanting to do anything except gasp.

Widow Xie and Hu Liang also praised.

Ji smiled: "If you want to praise, you should praise the fifth grandfather." ”

No matter how good a visor is, it can only play a limited role.

Seeing that their faces were red, their lips were white, and beads of sweat couldn't stop rolling down, Ji hurriedly poured cold tea and handed it over.

The three of them took it, and it was all a cow drink.

After drinking the water, I felt a little more comfortable and sat down to eat.

Ji asked Widow Xie when she would be done.

Widow Xie pointed to the distance: "That's it, I can cut it this evening." ”

Harvesting is only the first step, and then there are pressing, starting, hulling, drying grain, and storage...... And some are busy.

But at least you don't have to be exposed to the sun for a long time like this.

The mother and son both hated to live, and after eating in a hurry, they drove their sisters and brothers back: "It's too hot, and I have a heat stroke when I turn around." ”

Ji couldn't, packed up the dishes and chopsticks, and led Dabao back.

As soon as he got on the main road, he saw a familiar carriage driving in the distance.

After checking the homeless during the Xin Zi period, he regretted that he did not catch up with the process of removing the plaster.

Ji comforted him: "There will be another time later, next time I will definitely call you to watch." ”

Homeless man sitting on a stool: "......"

Xin Ziqi also felt that it was not good to say this in front of the patient, so he coughed and changed the topic.

"I've just seen it, these two heals very well, and the thread can really be absorbed."

This is what surprised Xin Ziqi the most.

Although according to the season, this thread is not suitable for wounds that require a long time to heal, but for some minor injuries, the sutures are simply impeccable.

It's a pity that this price is expensive and not easy to obtain, and it is not realistic to want to put it into use on a large scale.

"You can try to produce it yourself." Season proposed.

Xin Ziqi was slightly stunned: "This ...... How to produce? ”

Ji Afei asked: "Haven't you been preparing to build an equipment workshop recently, how are you busy?" ”

Speaking of this, Xin Ziqi looked embarrassed.

"I didn't have to worry about the preparation of the workshop, and the plaster bandages were not a big problem, but the first set of scalpels ...... I found several craftsmen, but the results were always unsatisfactory. ”

"I can't rush it, I have to give the craftsman enough time to ponder and polish. The equipment workshop was established, and the first batch of products launched were mainly gypsum series and sutures, and I will write you some of the production methods I know. ”

Medical sutures, as a type of medical equipment, can be said to be very inconspicuous. However, it is indispensable in surgery or trauma management to stop bleeding and suture tissues.

Absorbable sutures are used for tissues that heal quickly, especially in areas where foreign bodies should not be left behind, such as the gastrointestinal tract, bile ducts, myometrium, etc.

Nonabsorbable sutures are used for tissues that heal slowly, such as cartilage, ligaments, tendons, etc.

If it is to be produced, it is better to do it both ways.

Ji knows a lot of types of sutures.

According to the structure, there are monofilament threads, multifilament threads, and twisted threads; According to the type, there are silk threads, sheep intestine threads, chemical synthetic threads, and collagen sutures.

In addition, there are divisions by diameter.

However, considering the lack of biological materials and metal materials, as well as various difficulties such as production processes and sterilization conditions, it was decided to go according to the current level.

"You really don't know what mulberry thread is?"

This question doesn't need to be thought about in the Xin Zi period.

"My family has been a doctor for generations, and if there is such a suture, I will not know nothing."

He wondered why Yu Ji asked like this, as if Da Zhou should have this kind of line.

In fact, Ji himself felt strange.

During the Sui and Tang dynasties, there were records of doctors using mulberry threads to suture the intestines and skin.

"Deletion of Complicated Prescriptions" records the method of curing gold sores and intestines: "Mulberry peel fine thread sewing intestine reskin, with Puhuang powder powder." ”

It was recorded in the "Medical Heart Prescription": "If the intestine has been broken, it should be sutured with mulberry peel fine threads, and the hot chicken blood will be smeared."

The "Mulberry White Skin Wound Method" recorded by medical historian Geng Jianting was used until Western medicine came to China, and was gradually replaced by other methods.

During this period of the Great Zhou, there was obviously suturing, but there was no mulberry thread.

At present, they use the most common cotton silk thread, which needs to be removed, easy to leave scars, and easy to get infected.

"You're saying that this mulberry thread can also be absorbed by the body and doesn't need to be removed after stitching?"

After Xin Ziqi was surprised, he stared at Ji with burning eyes, obviously waiting for her to say how to make it.

"Mulberry thread is simple and simple, but it is actually a thread made of tree bark. But it's not that easy to make.

To take the root bark part of the old mulberry tree, remove the mottled yellow bark on the surface, tear off the thicker ribs of the inner layer, and then take its outer bark, after repeated hammering, processed into fine fiber threads.

Then select a thin line of uniform thickness, wipe it several times from beginning to end, wait for the thin line to be smooth and silky, and put it away.

When you are waiting for use, fumigate it on the steam of boiling water, and the thin thread will be soft as new, and it will fit the skin and flesh better when sewn. ”

This kind of mulberry thread is not easy to break, and the medicinal properties are peaceful, which can not only clear heat and detoxify, but also promote the healing of wounds.

Although the process is complicated, a large piece of mulberry bark is hammered to the end, and most of it must be eliminated, and there is not much available.

But at least the raw materials are easy to obtain and the labor is cheap.

"There is also the kind you buy at a high price from Fanguo, which is actually made by peeling the casing, membrane coating or tendon tissue of special animals of healthy animals, and processing them after disinfection, dehydration, and weaving.

However, this is relatively more troublesome, whether it is the peeling method and the weaving method, it is very exquisite, you can ask some craftsmen who have been engaged in related work all year round to try. ”

Ji also introduced the advantages and disadvantages of each type of suture.

In general, the advantages still outweigh the disadvantages, compared to traditional sutures, they provide sufficient tissue bite on an absorbable basis to ensure that the tissue joint bulge does not peel, and can also seal the needle hole caused by the suture process.

In the end, Ji found a pen and paper and drew a kind of suture needle.

Different from the straight needle she uses today, the one she painted is slightly curved.

"This kind of curved needle is sharp enough to pass through the skin and flesh tissue with minimal resistance, and it is more supple and resistant to breaking. If the suture can be produced smoothly, then a batch of sutures with needles can be made separately when the time comes, that is, several needles and threads are put into a separate package, and the connection between the needle and the suture can be separated without scissors. Let's try it out first and see how it goes. ”

To put it bluntly, the difference between sutures with needles and sutures without needles is not only the improvement of applicability, but also the distinction between high-end and low-end markets.

Xin Ziqi memorized it by heart, took the drawings drawn by Ji, bowed down and left in a hurry.

Ji was very helpless about this.

She positioned the relationship between the two as partners, and Xin Ziqi also agreed well.

But after that night talk, every time I saw her again, Xin Ziqi was a disciple ceremony for her.

Forget it, it's hard to be confused.