8

Before going directly into the topic, firstly, it is necessary to comprehend the mechanism of erection, because small fault due to different factors in the mechanism gives rise to its dysfunction. An erection is a complex process. It involves the central nervous system, the peripheral nervous system, psychological and psychological factors, local factors ...


7

Not towards the brain. Look at the two diagrams. The temporal artery is a branch of the external carotid artery that stays outside the skull. The internal carotid artery goes inside the skull. You couldn't compress the skull with sunglasses if you tried. MANY headaches are related to muscular/tendinous pain in the head and neck, not the brain. ...


7

It is commonly known by plastic surgeons etc that the close association of skin and bone in the shin area leads to poor healing. Anatomical studies suggest that this is caused by the comparative lack of deep perforating vessels. https://www.jprasurg.com/article/0007-1226(81)90061-8/pdf


6

Your thought process is correct; in the absence of all other factors, physics dictates that the reduction of pressure surrounding a flexible fluid-filled vessel would result in expansion. But there is an even stronger force: venous return, which is the flow back to the heart from peripheral circulation. (Resource linked is from the author of the cardiology ...


6

What happens when a blood vessel is cut during surgery? Blood vessels (not just veins, but arteries also) are transected (cut), ligated (tied off), and/or cauterized (burned closed) in just about every surgical procedure ever. When done appropriately, this does not cause a problem because there is more than one path from the heart to the tissue and more ...


6

First, notice that bubbles are stopped by the drip chamber on the IV, or if there's an infusion pump instead of a drip chamber, the pump itself will detect it and stop the flow. If there is a small bubble or two in the line after the drip chamber or pump, notice that it doesn't go anywhere. It just sits there and doesn't move with the fluid so it never ...


5

Removing veins impairs blood flow to that area, but since the varicose veins aren't really getting blood efficiently to their locality anyway, I wouldn't call the lack of perfusion from removing them a drawback, per se. Some complications can arise following surgery to remove varicose veins. Some of them are pretty innocuous, like skin discoloration, but ...


4

How can I deal with standing for long periods? I have an odd sensation, like pins and needles The technical name for that kind of altered sensation is paraesthesia. It can have a number of causes; so much so that if you are getting this and it's bothering you the usual response applies: go and seek medical advice. On the other hand, if you are still a bit ...


3

Your assumption that there is no fluid loss is wrong. In addition to the vasodilation Jan mentioned in his answer, there's significant fluid loss caused by increased permeability of the vasculature. The result is a massive fluid shift from the intravascular to extravascular space. This explains why swelling occurs in mucus membranes: fluid is leaking out of ...


3

Albumin is expensive and potentially dangerous, colloids have never been shown to be better than crystalloids, and there is no good evidence for their effective use in orthostatic hypotension. Albumin, due to its cost and the traceability requirements inherent to all blood-derived products, is rarely prescribed as first-line treatment 1 Synthetic ...


3

They work as photoplethysmogram: Because the skin is so richly perfused, it is relatively easy to detect the pulsatile component of the cardiac cycle. Basically the light flash measures your heart rate. The change in volume caused by the pressure pulse is detected by illuminating the skin with the light from a light-emitting diode (LED) and then ...


3

There seem to be a couple different issues under discussion. I will attempt to explain the relevant physiology and respond to the query in the title. Hiccup interruption. Most physical techniques involve stimulating efferent vagal tone. These are effective.1 Commonly used methods (similar to those used to abort supraventricular tachycardia) include: ...


3

Yes, blood viscosity changes with altitude. This is a study in rats where the control group was kept at normal altitude and the test group at simulated 5500 meters. Besides, RBC counts, hematocrit, whole blood viscosity, erythrocyte aggregation index of hypoxia model rats were all notably higher than those of normal control rats respectively. Changes ...


3

This is a very interesting question. Thank you. Just as a small background on pectus excavatum (PE) (also known as "funnel chest"). It is characterised by depression of the sternum that begins over the midportion of the manubrium and progressing inward through the xiphoid process: (from http://www.mayoclinic.org/diseases-conditions/pectus-excavatum/...


2

Short-Term Benefits Cold showers boost recovery after exercise: Athletes often take ice baths after vigorous training do reduce soreness. You don’t have to take it that far, but you can obtain a similar benefit with a quick cold shower after your training sessions. Cold showers increase mood and alertness: When cold water pours over your body, your ...


2

In venous lacerations, blood would be able to be stopped by placing a tourniquet below the injury. By stopping the blood from returning from the limb, you wouod be able to effectively prevent blood loss. This would work in the rare case of just the vein being cut, but it's safer to place the tourniquet above the injury in case the vein is not the only thing ...


2

Anemia means decreased ability of the blood to carry oxygen. Two examples are iron deficiency anemia and pernicious anemia due to impaired vitamin B12 absorption. You can have anemia and good circulation. Poor circulation is a decreased ability of the circulatory system (heart and arteries) to deliver blood to all parts of the body. Examples of causes are ...


2

The ingredients one by one Sorbitol: An alcohol sugar, and a sugar substitute. However, xylitol has become more widely used because a few type of bacteria (Streptococcus mutans) can process sorbitol and as such it is more anticariogenic. In addition, sorbitol has one-third fewer calories and 60 % the sweetening activity of sucrose and is used as a sugar ...


2

The easiest explanation is that there is no "knowledge" involved, just physiology/molecular biology. In an area of low O2 and high CO2 (therefore a demand exists for O2), the oxygen dissociation curve will favor O2 release into the blood, which will then oxygenate the tissue. Similarly, concentration of CO2 affects localizes extravascular pH. If there is a ...


2

Rate of blood loss through amputation of an arm will depend on a range of things including initial blood pressure and heart rate of the patient etc. Plus, blood pressure falls as the amount of fluid left in the blood vessels becomes insufficient (Merck MSD Manual, 2019). How the arm is severed can be a factor too. Some actions can seal the blood vessels at ...


1

In anaphylaxic shock, vasodilation can result in severe hypotension. The aim of crystalloid infusion is to help correct hypotension. There are various treatment regimes possible, but most authors suggest (for adults): Epinephrine 0.5 mg i.m. (to reverse vasodilation) Oxygen, at least 70%, by mask, 15 liters/min Intravenous crystalloid infusion 500 -1,000 mL,...


1

EDIT: Its thoracic outlet syndrome. If I do certain stretches it goes away Old: So I looked into it, and I found those ingredients are actually good for "carpel tunnel" which has been found to be related to raynauds in some cases... this is essentially a pinched nerve due to bad posture (common in computer scientists). I don't think I have this in my hands,...


1

Your experience that alcohol warms your fingers and the fact that the drug nifedipine is used in Raynaud's symptoms relief suggest that the mechanism involved in warming fingers is vasodilation. From the list of ingredients in your product, L-theanine can cause arterial vasodilation and could therefore be theoretically responsible for symptoms relief. ...


1

Cyanosis occurs when the concentration of deoxyhaemoglobin is high (greater than 5g/dL), because deoxyhaemoglobin absorbs differing wavelengths of light than oxyhaemoglobin and looks bluer. Central cyanosis occurs when there is high deoxyhaemoglobin levels in the arterial blood, caused by: Shunt of deoxygenated blood into the systemic arteries Impaired ...


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