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Sites worth a visit

V F Murphy Monday 11th October 2004

A Few Recommended Sites

Whilst using the internet our editorial team have identified a number of sites which may well be worth a visit.

Biomedical Engineering

Clinical Engineering Society of Ontario - The Clinical Engineering Society of Ontario, CESO, represents the professional interests of Clinical Engineers and Biomedical Engineering Technologists and Technicians in the Province of Ontario.

EBME Biomedical Engineering - Medical, biomedical and clinical engineering portal website. Educational articles, discussion forum, recruitment section.

Biomedical Engineering Central - The global source for Jobs, News, Labs, Companies, and Resources for

Biomedical Engineering.

Medical Device Forum - Bulletin board-newsgroup for Medical Device industry professionals. Share ideas, discuss current issues, or seek solutions regarding the design, manufacture, or regulation of medical devices.

You can also find a wide range of sites within the high quality DMOZ O…

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Grays Anatomy

V F Murphy Sunday 3rd October 2004

Gray\'s Anatomy is widely respected as a textbook. The quality of illustration and great detail of explaination within this classic book points towards the original excellence of Henry Gray.

Grey\'s Anatomy is known as the authoritative anatomy guide, and can be found on the shelf of most medical and anatomical professionals.

If you wish to purchase Gray\'s Anatomy, you will find a good price from Amazon, see link below.

Amazon : Grey\'s Anatomy …

Measurement of Blood Flow

V F Murphy Saturday 24th May 2003

Continuous wave ultrasound Continuous wave ultrasound probe techniques involve an ultrasound signal being transmitted into the skin, and the difference in frequency reflected being measured. Along with the spectral broadening, this provides an indication of blood flow in terms of turbulence and presence. It however is difficult to get a qualitative measure, to discriminate between venous, capillary, or arterial vessels, is sensitive to the angle to flow, and lacks depth resolution. On the positive side it is non-invasive and by modulating the response using a carrier signal an audible signal can be produced which sounds either dirty (turbulent flow), or clean (laminar flow), giving an indication of underlying problems. The signal is continuous which allows for monitoring during surgical applications and detection of pulse. Venous Occlusion Plethysmography Venous Plethysmography is a technique which looks at the performance of the venous system in a limb. The limb is enclosed wi…

Specialism Setup

V F Murphy Saturday 24th May 2003

The specialism format code determines what data will be displayed on the index page.

Terms are divided using a , and arguments are given within (). Only the first 4 letters of a keyword are required. description

The description field, as input in the specialism setup form, will be output. articles(int [max 99])

This will pull from the database the requested number of articles and present them in a pretty way.…

Vincent Francis Murphy

Editor Thursday 1st January 1970

Vincent Francis Murphy holds an MEng in Medical Engineering (London), and is the guiding hand behind the editorial team at MedicalEngineer.co.uk magasine.

Vincent can be contacted by email at admin 'AT' medicalengineer.co.uk.

Read Vincent's blog at MaleMiddleClassAndWhite …

Physiological Stress Markers

A J Michael Thursday 1st January 1970

Although psychological approach in measuring stressors provides to some extent the mechanisms in which stress affects health or illness, a better measure would be a physical or biological measure. Psychological measures such as questionnaires are not very reliable as the individuals interviewed may not report the stressors due to a number of reasons, such as adaptability and self consciousness. (Amsterdam et al 2000).

A physical stress measure on the other hand is more feasible as its focus is on the autonomic nervous system. Measurement of heart rate variability and blood pressure readings has been used as markers of the sympathetic activity. Other new informative diagnostic characteristics of human functional states that are highly efficient and sensitive in revealing the early signs of emotional stress and stress induced disturbances include respiration rate, vital lung capacity, and forced vital capacity (Sudakov & Glazachev, 2001). An ideal biological stress marker would hav…

Electrocardiogram EKG For Heart Disease

A.J. Michael Thursday 1st January 1970

Electrocardiogram (ECG or sometimes known as EKG) offers two types of information. It measures the length it takes for electrical waves to travel through the heart and the amount of electrical activity that is generated and passes through the heart muscles. ECG can determine whether the waves are slow, fast or irregular.

In the heart, pacemaker cells are specialized cells that produce electricity by rapid change of their electrical charges from positive to negative and vise versa. This electrical current begins from the top of the heart and spreads quickly to the end. The heart beat produces makes the heart muscles contract. The contracting of the heart muscles work to pump blood from the heart.

As electrical waves tend to get weaker when it travels through bone and skin, the ECG has electrodes sensitive enough to detect these waves non-invasively through the skin. These electrical waves is recorded in millivolts by an electrocardiograph and translated to recordings in pape…

Pacemaker Information

Ahmed Bilal Thursday 1st January 1970

Pacemakers are battery-powered devices that function to electrically stimulate the heart to contract and thus to pump blood throughout the body. It consists of two parts “ the generator and the leads. The generators weigh less than 30 grams and the battery can last anywhere from 7-8 years on average and is replaced when necessary. Pacemakers are usually implanted in patients in whom the heart's own "spark plug" or electrical system is no longer functioning normally.

The sinoatrial (SA) node, located in the right atrium, is the heart ™s normal ˜spark plug ™ which generates an electrical impulse that signals the left and right atria to contract and pump blood into the ventricles. The impulse then travels down into another small patch of specialized heart tissue called the atrioventicular node (AV) node, located between the atria and ventricles. The AV node conducts the electrical impulse to the ventricles which then contract and pump blood out into the lungs and throughout t…