Recently, I saw a saying on the Internet:
Condoms and condoms are different. Condoms can only block sperm with a diameter of more than 1,000 nanometers, but cannot block HIV with a diameter of 140 nanometers and hepatitis B virus with a smaller volume of 40 nanometers, while condoms can.
The first time I saw this statement, my brain was blank. For so many years, I have never felt that condoms and condoms are two kinds of things…
This time, let’s talk about all kinds of condoms. Condoms, condoms, liquid condoms… all condoms!
First, where did the condom and condom dispute come from?
Most of the online content about the difference between [condom] and [condom] comes from media reports, and it does not really make it clear whether there is a what difference between the two in technology.
Is it true that [condoms] can block viruses and [condoms] can only prevent contraception?
No matter how many kinds of Condom, as a medical device, it is bound to follow certain national or international standards when producing.
Looking up the national standard < < Technical Requirements and Test Methods for Natural Latex Rubber Condoms > > (GB7544-2009/ISO7074: 2002), we will find that the introduction clearly expounds the effect of condoms on preventing various sexually transmitted diseases:
It has been proved that the intact latex membrane can isolate the infectious medium of human immunodeficiency virus (HIV), sexually transmitted diseases (STIs) and sperm.
In other words, as long as natural latex rubber condoms are produced according to this standard, there should be no obvious difference in the efficacy of contraception and prevention of HIV or other sexually transmitted diseases.
If an enterprise wants to carry out similar [super-strong] or [super-safe] publicity in the production and sales of condoms, the standard also clearly stipulates that such products are more suitable for anal sex and other situations:
In many countries, certain types of condoms are named [super-strong], [special strength], [super-safe], etc. Sometimes, [super-strong] condoms are recommended for anal sex.
Second, can the virus really pass through the condom?
The gap between latex molecules is larger than the diameter of the virus, so the virus can pass through.
At first glance, this statement sounds quite reasonable, but there is no sufficient basis. After all, it is too young too simple.
The most important factor that determines whether the virus can pass through a certain pore diameter is the fluidity of the liquid. If the latex membrane can successfully block the flow of body fluid (no water leakage), even if there are pores several times the diameter of the virus between latex molecules, the virus cannot pass through this barrier [1].
Whether the condom can block the virus depends on whether the latex film is complete or not. In popular terms, it is whether there are tears, damages, pinholes, correct wearing, slipping during use, etc.
Three, condoms, condoms: a different name for something
I believe you also understand that condoms and condoms have no essential difference. Condoms can reduce the risk of infection of various sexually transmitted diseases in addition to contraception. In order to cooperate with public health to prevent and control sexually transmitted diseases and promote the need for safe sex, they are also increasingly called [condoms].
However, even if it is called condom, it cannot guarantee 100% safety, but insisting on the correct use of condom is still the most effective and common STD prevention measure.
Four, what are the different materials of condoms?
Natural latex rubber sleeve
At present, the vast majority of sleeves on the market belong to this category, which is characterized by good ductility and strength, wear resistance and difficulty in breaking. However, emulsion rubber sleeves cannot be used together with oily lubricants, otherwise they are easy to crack and may lead to allergy.
Polyurethane)
In the case of synthetic material, Polyurethane is the most common one. Compared with milk rubber condoms, It has better heat transfer and longer shelf life, can be used together with oily lubricant, and is less likely to cause allergy and has no special smell. However, polyurethane sleeve has slightly poor elasticity and may be easier to break. Some studies believe that the contraceptive and disease prevention effects of polyurethane sleeve are equivalent to or slightly worse than those of traditional latex rubber sleeve [2].
There are also condoms made of other synthetic materials on the market, and some merchants claim that their condoms have used some advanced technologies, which can greatly reduce the risks of various diseases. However, from the existing research, it is not said that the disease prevention effect of any material is significantly better than that of traditional milk rubber condoms.
Five, liquid condom is what again?
There is also a so-called liquid condom on the market, which feels very strong. Is this another what thing?
In fact, this is a vaginal spermicide called Nonoxynol-9 (N-9), which has inactivation effect on sperm. However, if it has the effect of preventing AIDS in what, it is totally nonsense.
N-9 is not new in what. At first, people thought that this substance can prevent various sexually transmitted diseases including HIV, but studies have long confirmed that its effect is limited [3], and WHO has long recommended it, because this ingredient will destroy epithelial cells of vagina or rectum, resulting in a higher risk of HIV infection and other sexually transmitted diseases [4].
There is so much discussion about condoms and condoms. Don’t be fooled by the gimmicks of merchants.