The principle of laser treatment of hypertension
How does Laser Therapy Watch Treat Hypertension?
The laser wrist watch is adopted eleven 650nm low-level laser, when cold laser watch irradiates defined acupuncture points on the wrist (radial artery, Antiguan point and nasal cavity acupoint), the energy light can be absorbed by cells, to stimulates protein synthesis, help to clean blood vessel waste, improve oxygen-carrying capacity of red blood cells, accelerate blood circulation & human metabolism, reduce high blood viscosity, blood sugar, blood fat, blood pressure, repair damaged nasal mucous and cure rhinitis at the same time.
What's more, the laser watch can also irradiate the inner area of the nose using the adapter included. The inner area of the nose comprises a multitude of capillaries. The nerves in the nose are stimulated, the blood circulation in the skull is improved and in total the local microcirculation is thus improved. Furthermore, as a result of the stimulation, more oxygen should be made available in the brain.
Why the technology works – the evidence
As discussed above, a common factor among hypertension patients is high blood viscosity and high RBC aggregation. Blood irradiation therapy with red light reverses these abnormalities. In a landmark randomized, double-blind, placebo-controlled study, Timon CY Liu et demonstrated with statistical significance that intranasal LLLT reduces blood and plasma viscosity, and red blood cell aggregation. Although the tests are conducted with lasers, there are sufficient basis to assume that non-laser light of similar wavelength should achieve equivalent efficacy. This provides convincing support that intranasal light therapy can play significant role in reducing high blood pressure for most patients since blood viscosity and aggregation are key factors behind high blood pressure.
Further, as discussed earlier too, vascular walls also dilate (vasodilatation) to allow blood with these problems to maintain its rheological properties, addressing a common problem of aging.
Figure 3 below is typical of the impact that blood irradiation therapy has on RBC aggregation.
The set of 3 images in the left column shows blood samples before 25 minute treatment, and the images on the right-hand-side show the same blood samples after the treatment. From the visual evidence, it is apparent that RBC aggregation is reversed after the blood stream is illuminated with red light, supported by the measurement in Timon Liu et al’s randomized, double-blind study mentioned above.
Other studies are not as directly relevant but provides additional support that LLLT has the effect of lowering high blood pressure. One study reports that an LLLT treatment on 42 men significantly lowered systolic, diastolic and mean arterial pressure. Total peripheral vascular resistance also decreased. A good hypotensive effect was achieved in 90.4% of the cases. In another study, the effects of a low level laser on the control of blood pressure were tested via energy administered via the medulla oblongata. The results from a group of 30 patients suffering from hypertension were positive in 80% of the patients.
Specific study on LLLT intravenous irradiation therapy on hypertension
A study that specifically used this method of therapy to test its effectiveness in reducing high blood pressure has found it to be effective. The method focused on reading the systolic blood pressure on 3 groups: normotensive (25 subjects with readings of less than 120 mmHg), pre-hypertensive (50 subjects with readings of 120-139 mmHg) and hypertensive stage 1 (50 subjects with readings of 140-159 mmHg). All groups were treated for 30 minutes with the intra-venous irradiation method described above deploying low level laser light with 630 nm wavelength continuously powered with 2.5 mW of energy at the end of the intravenous fibre. Pulse rate, systolic, diastolic, and pulse pressures were measured before, after and 15 minutes after each treatment.
The results were as follows: There was no statistical difference for the pulse rate, systolic rate, and diastolic blood pressure in the normotensive group. However, there was significant difference in the readings for the pulse rate, systolic and diastolic blood pressure in the pre-hypertensive group as well as for the hypertensive group.
Laser was first used in the medical field as a focused, high-power beam with photothermal effects in which tissue was vaporized by the intense heat. During the early phase of its use as a surgical tool, it was noted that there appeared to be less pain and inflammation after laser surgery than conventional surgery. It was postulated that this effect was related to the use of surgical lasers with a Gaussian beam mode. In this mode, the power of laser is highest at the center of the beam, with the power then falling off in a bell-shaped curve and with the weakest power at the periphery of the beam diffusing out into the undamaged tissues.6 This phenomenon was called the α-phenomenon.6 Thus, the “low-power” segment of the beam was postulated to be responsible for the decreased pain and inflammation in the wound. Workers in the field recognized this effect. Laser devices were manufactured in which power densities and energy densities of laser were lowered to a point where no photothermal effects occurred; but the photoosmotic; photoionic, and photoenzymatic effects were still operative. Thus, the use of “cold” laser or “soft” laser, as it was first known, came into medical use. The latest new laser devices are designed at infrared wavelength combined with high-frequency pulses that allow the photons to penetrate deep into tissue without heat effect.