17

It is likely you are not hearing the ultrasound itself (typical frequencies are upwards of 1 MHz, far beyond what the human hearing system is capable of detecting). You are probably hearing coil whine from the electronics -- switched-mode power supplies in particular tend to operate towards the upper end of the hearing range, and the intensity of this sound ...


8

As you read, both TENS and EMS employ electrotherapy to treat acute and chronic pain, but the methodology differs. (Note that some of the references are to NMES, which stands for Neuromuscular Electrical Stimulation, and is considered synonymous with EMS.) Transcutaneous Electrical Nerve Stimulators (TENS) use electrotherapy to stimulate the nerves and ...


7

Your technical understanding is correct and television is fiction. In fact, watching shows involving CPR and defibrillation is a source of both amusement and frustration for most medical professionals because it is almost always portrayed wildly inaccurately. Defibrillation is effective against only ventricular fibrillation (VF or V-Fib, which is when the ...


7

Heart attacks are caused by reduced or blocked blood flow to the heart, but a sphygmonanometer cuts off the blood flow to the arm (or leg) only. It's not possible it could cause a heart attack directly even if it were left on indefinitely. However, leaving a BP cuff on for a very long time could cause injury and eventual tissue death in the arm, or possibly ...


7

Basically you have a normal ECG reading according to the machine. Sinus rhythm (as explained in the first section of this book chapter) is normal, meaning that the heart is depolarized by a wave starting in the sinus node. That is the first part of the message. It is worth noting, that if your heart rate had been 1 beat per minute less, it would have ...


7

Ah, but they can and do. A non-rebreather (NRB) mask with 100% O2 flowing at 12-15 L/min will provide about 90% O2 concentration to an adult. This is true even for the largest adult in severe respiratory distress. There are a couple of reasons for this. First, the 3 liters figure you cited is the inspiratory reserve volume (IRV). Here are two definitions ...


6

Basically I agree with JohnP. The "otherwise normal ecg" is an unfortunate phrase. Sinus rhythm is the normal rhythm of the heart. So the machine should interpret as: Normal ECG. Rhythm:Sinus Heart Rate : PR interval: etc etc. By saying otherwise normal ECG, of course creates unnecessary suspicion.Modern machines are improved in doing an automatic ...


6

The timing of the first defibrillation attempts depends mostly on when defibrillation is detected. If it is witnessed - that is, the patient is being monitored and the alarm goes off, you're right there at the bedside, and the patient is in V Fib, it's fine to shock first. However, whereas this used to be the norm - shock first - it no longer is, partly ...


5

"Giving" electrical current to the heart does not necessarily translate to mechanical contractions. The excitation-contraction coupling (as the sequence of electrical activation an muscle contraction is officially called), is not always a guarantee. A cardiac arrest in many cases mirrors severe malfunction on the level of the micro-structures of the heart ...


5

What is a stye? A stye is an infection of the sebaceous glands at the base of the eyelashes or the apocrine sweat glands on the margin of the eyelid. Styes are caused by the gland becoming blocked by cell debris or sebum, a natural oil produced by the body. The stye generally appears on the interior or margin of the eyelid as a small whitish colored ...


5

In the United States, any ventilator must fulfill: Safety and Efficacy requirements as set forth in Medical Device Standards. Sales of medical devices are regulated by the FDA: a lengthy (data intensive) and paperwork intensive process. FDA ventilator specific guidance within the context of COVID respirator demand I would suggest that you identify ...


5

The results of our studies, which also included a double-blind randomized control trial, confirm that LI-ESWT generates a significant clinical improvement of erectile function and a significant improvement in penile hemodynamics without any adverse effects Source: Gruenwald, I., Appel, B., Kitrey, N. D., & Vardi, Y. (2013). Shockwave treatment of ...


4

The most important instrument is laparoscope/endoscope which is a fiberoptic instrument inserted through an incision in the abdominal wall and used to examine visually the interior of the peritoneal cavity. (link) Laparoscope is the instrument with video camera. There are also: veres needle needed for draining fluids trocar insufflator for ...


4

Here are some resources and books you can use but before that check out FDA ,radiologyeducation.com, virginia.edu , emory.edu and sprawls.org i think they can pretty much give you the information you want. For fundamental information and physic of radiography ( which i think is the answer to your question) : Principles of Radiographic Imaging: An Art and a ...


2

Sensitivity refers to the level at which the ventilator will trigger a breath. CPAP provides, as the name implies, continuous pressure. This is known as PEEP. PEEP is the background pressure that the ventilator always tries to maintain, whether a patient is breathing in or out. When a patient tries to breathe, they suck in air, lowering the pressure to ...


2

I think its time to update this question: now there are available a couple of options that do not require the calibrations of the CGM through the fingerstick. The Dexcom G6, which it could be seen as the first "real" CGM that does not require calibrations. Dexcom states: As a factory-calibrated, real-time CGM system with exceptional accuracy, the ...


2

In an ideal world everyone would have full body Ebola type protection. In the world of practicality, the WHO has advised that this is a droplet, and surface spread infection. However, it is not discounting the possibility of aerosols especially during some medical procedures eg. induced coughing, and then a potentially ill fitting mask and goggles may not ...


2

Cairo University's Journal of Advanced Research (PDF) looks at all of the studies on ElectroMagnetic Interferene (EMI) from mobile cellular phones and medical equipment. It says that based on the literature, it was realized that during the initial development of cellular phones, the 2G cellular phones had caused more interference in the functioning of some ...


2

In a typical ambulance operating at the paramedic level in the US, the following vital signs might be recorded: Heart rate Respiratory rate BP SpO2 GCS EtCO2 Pupil size The last two would be uncommon and only found with certain patients. It's likely there would be more than one set of vitals if the transport time is longer than a few minutes. As for size, ...


2

I am working in the information security industry and personally following medical technology closely. Your first question kind of asks to predict the future, which nobody can. Yet, I will give you my personal opinion on the matter. Is it reasonable to expect the cost of sequencing an individual's genome to drop so much in the near future as to allow for ...


2

The research on this topic is a little mixed, but a new study[1] published in January 2019 reviewed almost 40 previous studies, and concluded the shockwave therapy significantly improves erectile function in patients with vasculogenic ED. One problem remains, however. The is an external treatment, which in most countries means it does not need government ...


1

The first question relates to the retail price floor of genome sequencing hardware. As with any commercial product, price depends on demand. I don't envision much demand for home genome sequencing, for three reasons. The hardest part of genomic inquiries is not getting the data, but interpreting it. The demand for interpretation will grow, and I suspect ...


1

No there isn’t. Your computer is lacking the hardware diagnostic tools, so a software won’t be able to help. An actual blood test is a compilation of multiple tests done by experts in a lab, and even the simplest and faster forms (an ABG, as an example takes <5 minutes) use machines which cost more than 300 dollars for sure. Where would you inject a blood ...


1

I am aware of only three available CGMs in the US today: The Dexcom G4, the Dexcom G5, and the Medtronic Enlite. There used to be one more, the Abbott Navigator, but it was withdrawn from the US market about 4 years ago. The Medtronic Enlite had a very rough start, with many complaints and worries about accuracy, but seems to have stabilized. The Dexcom G4 ...


1

It would be great to be able to keep an infusion set for that long. The reason why infusion sets cannot stay as long as CGM sensors is that the cannula used for injecting insulin in an infusion set is a lot more invasive and damaging than the very thin fiber that is used for measurement in a CGM sensor. CGM users often make their sensors last much longer ...


1

Unfortunately no, I have not found in my research any pumps which can be attached for a longer amount of time, although I did find a study which you may find relates to your question. Link to Study The following is the rationale behind site transfer and the suggested schedule. The manufacturers of IISs and insulin formulations used in insulin pumps ...


1

There are no inhaled insulin products that are long-acting, basal products. Today, Afrezza is the only type of inhaled insulin that is available, and it is of course bolus insulin. The only other inhaled insulin product that made it to commercialization, Exubera (PDF), only lasted a year, and was also a fast-acting bolus insulin. By its very nature, inhaled ...


1

I agree with the other answer and wanted to add a few things. At most larger healthcare systems in the USA, EHRs are used. Paper is still sometimes used in smaller practices, but rarely. In the USA physician documentation is called notes, not letters. Letters generally are directed to a particular individual, for example to a specialist or work note, etc. ...


1

I definitely agree with you, to not bother with bioelectrical impedance devices as they really are not worth that much. The dexa scan readouts I have seen in America are pretty straight forward. They tell you bone density, lean body mass and fat mass and a few other things in a very readable format. It will give you the data per section of your body such as ...


1

During dialysis only about 10 percent of the blood is outside your body at any given time, while the rest continues to circulate. If the blood flows at 600mL/min, then it doesn't take very long to clean 5 liters (say 8 min). So why aren't you done that quickly? There are three reasons: Each time cleaned blood is returned, it mixes with the waste-filled ...


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