definitions of hair removal

Tuesday, August 25, 2009

Before we do go, I define some terms as they are used in this discussion. It turns out are in the hair removal industry results not the only thing that can be confusing. Therefore we will get accurate! "Hair" this may seem stupid, but hair must be set. When some people say that their aircraft remove hair, they are not always speaks removes all hair types. Indeed, it is unable to delete all hair types in a domain permanently in treatment. The following are distilled based an excellent summary of the fundamentals [1]. There are three types of hair can appear on your skin: Vellus: sometimes called "peach fuzz", these are small colorless hair. Intermediate: between vellus hair and the terminal. Thin, but with some pigmentation. Terminal: what are deeply rooted coarse hair or spots or grey (usually hair consumers want deleted). In addition, all hairs have a three-step growth cycle: Anagen: growing active phase Catagen: a brief Telogen transition phase: phase dormancy up to throw and replaced by a new hair anagen quantities of each type of hair and hair growth cycles vary from person to another. That is another reason why it is difficult to compare the results of removal of hair between you and others. Depending on the body area, anywhere from 20 % to 85 % of hair are anagen (this is called the ratio of telogen anagen). Many methods of hair removal have been shown to be more effective on the growth of hair anagen. This means that a single treatment from a device can handle all your hair. One last thing to discuss is potential follicles. Many follicles do not produce a hair, even if they have the potential to do so. Follicles can be enabled by hormonal changes (such as puberty, pregnancy, ageing, etc.) or by other chemical products or medical conditions. That is why even after the hair removal permanent, completely new hair can grow. "Permanent hair removal" consumers bear more "permanent" average lasting forever. Unfortunately, is not always the case as it is used in advertising. For example, a wave of standing in your hair is not truly permanent. What time should elapse before results can be regarded as permanent? As for still pending is out of the question, much, myself included, have suggested arbitrary definitions of the "permanent" evaluating new hair removal devices. Some of the use of persons of definitions are quite ridiculous. A manufacturer submits that its device is permanent based on the results after 9 weeks. It is ridiculous to base a claim on a short period. observation but FDA formerly allowed this place to [2]. Waxing may finally as long, and it is clinically observed to be temporary [3]. Permanent hair removal can be generally defined as "the destruction full of a hair follicle treated ability to generate hair." Here are my personal and non-official "permanent hair removal" working definition when assessing new devices: able to go one year after your final hair removal treatment and always be as clear hair in the area treated as you were right after your final processing. This, means of course, also you then a year without having to use any other method to remove or conceal hair in the treated area. This is based partly on a single definition for the permanent reduction of hair (below). However, some hair have a years [1] sustainable growth cycle. This means a year may not be long enough to determine actual tenure, but many consumers would be pleased to have a hair removal treatment a year. "Permanent hair reduction" another confusing definition. In 1998, the US Food and Drug Administration (FDA) began to some manufacturers of laser removal hair and flash lamps used to epilation to use the term "hair permanent reduction," [4] that the Agency is defined as: the long term, permanent reduction in the number of hair regrowing after a treatment plan. The number of regrowing hair must be stable, a greater than the duration of the growth of hair follicles that varies from 4-12 months according to the location of the body complete cycle time. Permanent reduction hair does not necessarily mean the Elimination of all hair in the treatment area. [5] for purposes of customs clearance, FDA requires the Earl of hair be measured 3, 6, 9 and 12 months after the last treatment [5]. This is one of these things complicated, that I you warned! I explain "reduction permanent hair" in detail in the section on the laser hair removal. "Response rate" defined here as: the percentage of people that meet a treatment. Medical literature indicates that, for unknown reasons, some consumers do not respond to laser or electrolysis procedures [6.7]. Less available clinical data plue the margin of error in the response rate. With Vaniqa, for example, 58 % of women responded to the active ingredient [8]. However, if a third of the subjects were "false positives" as they were in the group control, the actual response rate really is closer to 25%.That's why you can't rely on the personal experiences of some people. Response rate must be compared against a group of greater control and determine that positive results are not a coincidence if just because we have business with so many variables. "Rate rejects" defined here as: the percentage of hair that returns after one or more treatments. Medical literature indicates that the rates of regrowth suite hair removal vary wildly. This means regrowth rates are practically impossible to estimate with precision. For example, 22 % to 100 % regrowth was reported in the follow-up treatment laser long-term [9, 10]. Even after 125 years of clinical and empirical evidence concerning electrolysis, published estimates still between 15 % to 50 % range. [11]. Other expert predicts only regrowth could range from 20 % to 30 % by treatment in ideal conditions, adding "the exact percentage is unknown." [12] Less clinical and empirical data available, plue the margin of error in the rate of regrowth for each method. In addition, which is counted as regrowth must be carefully defined. Adequately rigorous studies should describe the total number of hairs treated, specifying the number of terminal and vellus hair [13]. Some researchers have proposed a definition of regrowth that counts as terminal hairs. [14]. Although many consumers seeking treatment are primarily interested in the removal of terminal hairs, this selective regrowth definition makes the results of treatment seek better to face and true effectiveness rate code. Whew! Now that we are all on the same page, let's look at some devices and claims there.