Breathing in substances called respiratory sensitisers at work can cause occupational asthma.

A respiratory sensitiser is a substance which when inhaled can bring on an irreversible allergic reaction in the respiratory system. Once a sensitisation reaction occurs, continued exposure to the substance will produce symptoms.

Sensitisation does not usually take place right away but can happen after several months or even years of breathing in the sensitiser.

Substances responsible for most cases of occupational asthma include the following:-

Substance Groups & their Common Activities

Isocyanates:Vehicle spray painting;foam manufacturing

Flour/grain/hay:Handling grain at docks;milling, malting, baking

Glutaraldehyde:Disinfecting instruments

Wood dusts:Sawmilling, woodworking

Electronic Soldering Flux:soldering

Latex:Laboratory animal work

Some glues/resins:Curing of epoxy resins

The symptoms of respiratory sensitisation are:

– asthma – attacks of coughing, breathlessness and tightness of the chest

– rhinitis and conjunctivitis – runny or stuffy nose and watery or prickly eyes

Once a person is sensitised, symptoms can occur either immediately they are exposed to the sensitiser or several hours later. If the symptoms are delayed, they are often most severe in the evenings or during the night, so workers may not realise it is work that is causing the problem.

– If exposure to the substance continues, this can result in permanent damage to the lungs. People with rhinitis may go on to develop asthma.

– Respiratory sensitisers are regulated by the Control of Substances Hazardous to Health(CoSHH).

CoSHH guidelines recommend an assessment of the risks created by work which are liable to expose employees to respiratory sensitisers.

First, find out whether there is an activity or process in your workplace which uses or creates respiratory sensitisers.

If this is the case, then ask the following:

– Is the sensitiser likely to become airborne in use?

– Are there safer alternatives?

– Who is likely to be exposed, to what concentrations, for how long and how often?

According to CoSHH regulations, exposure must be prevented or controlled. To do this you will need to think about how you can:

– Stop using the sensitiser altogether perhaps by replacing it with a less harmful substance;

or if this is not reasonably practicable;

– Segregate work that may pose a risk; or totally end the process;

or if this is not reasonably practicable;

– Partially enclose the process and provide local exhaust ventilation.

If after carrying out the above you still have not achieved adequate control you will also need to use respiratory protective equipment (RPE).

Unless you are confident that your CoSHH assessment shows that there is an unlikely risk to your health, then a system of health surveillance will need to be set up if employees are exposed to respiratory sensitisers.

If health surveillance makes you suspect an employee has become sensitised you should:

– Remove the individual from working with the sensitiser and advise them to consult a doctor giving information on the work they do and the substances they may have been breathing in;

– Review your CoSHH assessment and existing control measures and make any necessary changes.

If employees are exposed to respiratory sensitisers then employers have a legal duty to inform, instruct and train them so that they know and understand:

– The risks to health;

– The symptoms of sensitisation

– The significance of reporting even possibly minor symptoms at an early stage;

– The proper use of control measures;

– The need to report promptly any failures in control measures

What’s the first thing that comes to your mind when you think about a career in the field of healthcare? Does your mind conjure up images of somber-looking doctors and nurses attending to one medical emergency after another? Or are you discouraged by the thought of going through years of extensive schooling?

Well, it’s time someone told you there is more to the healthcare profession than doctors and nurses. There’s a whole army of healthcare professionals who specialize in providing different kinds of patient care. What’s more encouraging is the fact that a lot of these professions don’t require extensive training or years of schooling.

Among these lesser known medical warriors are respiratory therapists or RTs. Respiratory therapists provide treatment, evaluation, and care to patients who are suffering from breathing or cardiopulmonary disorders.

They work with physicians in the cardiopulmonary or respiratory care department of a hospital, clinic, or home health services center. Among their many duties are:

Diagnosing breathing disorders.
Recommending appropriate treatment.
Conducting physical examination of patients.
Managing ventilators and other breathing devices.
Educating patients and their families about breathing disorders.

If you think becoming a Respiratory Therapist is your cup of tea, you need to start planning early. Maintaining good grades in biology, chemistry, physics, and math through high school could hold the key to becoming a Respiratory Therapist.

A strong foundation in these subjects will ensure that you sail smoothly through college. Although you can get started with an Allied Health degree, there are direct programs that train you specifically for a career in Respiratory Therapy and may be a good choice for interested candidates.

Two-year training programs leading to an Associate’s degree in Respiratory Therapy are offered by community colleges, career schools, hospitals, and the armed forces. An Associate’s degree comprises both classroom instruction as well as clinical training. In fact, clinical training is a very important component of any Respiratory Therapy program as it allows students to work in real life situations in a healthcare environment.

Although entry-level jobs can be attained with an Associate’s degree, a Bachelor’s degree in Respiratory Care indicates a higher level of expertise and may be necessary for professional growth as well as for accessing roles with greater complexity. A Bachelor’s Respiratory Care program also comprises courses in management and non-clinical aspects of healthcare.

Some of the topics you can expect to learn en route to becoming a Respiratory Therapist are Cardiopulmonary Pharmacology, Pulmonary Anatomy & Physiology, Airway Management, Microbiology & Decontamination, Respiratory Care Protocols, Mechanical Ventilation Management, etc. Respiratory Therapists require a license from the National Board for Respiratory Care (NBRC) to practice in all U.S. states except Alaska and Hawaii. The board offers two types of credentials:

Certified Respiratory Therapist (CRT): This license is offered to RTs who graduate from accredited entry-level or advanced programs and also pass a licensure examination.

Registered Respiratory Therapist (RRT): This license is offered to CRTs who graduate from an advanced accredited program and pass two separate examinations. RTs who desire supervisory positions require an RRT.

In addition to these NBRC-conferred licenses, all practicing respiratory therapists need to obtain and maintain a certification in cardiopulmonary resuscitation (or CPR). Once you have the desired qualifications and necessary licensure, you can explore employment possibilities in a wide range of healthcare settings.

Bromoethane, also known as ethyl bromide, is a chemical compound of the haloalkanes group. It is abbreviated by chemists as EtBr. This volatile compound has an ether-like odour.

In organic synthesis, Bromoethane is the synthetic equivalent of the ethyl carbocation (Et+) synthon. In reality, such a cation is not actually formed. For example, carboxylates salts are converted to ethyl esters, carbanions to ethylated derivatives, thiourea into ethylisothiouronium salts, and amines into ethylamines.

The preparation of Bromoethane(CAS NO.: 74-96-4) stands as a model for the synthesis of alkyl bromides in general. It is usually prepared by the addition of HBr to ethene:
H2C=CH2 + HBr H3C-CH2Br

Bromoethane is inexpensive and would rarely be prepared in the laboratory. A laboratory synthesis include the reacting ethanol with a mixture of hydrobromic and sulfuric acids. An alternate route involves refluxing ethanol with phosphorus and bromine; phosphorus tribromide is generated in situ.

Bromoethane is Dangerous!

Bromoethane is an extremely flammable liquid. Water-reactive. Carcinogen. It causes respiratory tract irritation. Causes eye and skin irritation. Inhalation of a mist of this material may cause irritation of the lungs. May cause digestive tract irritation. May cause cancer in humans. May cause lung damage. May cause cardiac disturbances. May cause liver and kidney damage. Target Organs: Kidneys, heart, liver, lungs.

Potential Health Effects

Eye:it causes eye irritation.
Skin: Causes skin irritation. Exposure may cause irritation characterized by redness, dryness, and inflammation.
Ingestion: May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause respiratory failure. May cause systemic toxic effects on the heart, liver, and kidneys.
Inhalation: Causes respiratory tract irritation. Irritation may lead to chemical pneumonitis and pulmonary edema. May cause effects similar to those described for ingestion. Causes narcotic effects including headache, dizziness, weakness, unconsciousness, and possible death.
Chronic: Prolonged or repeated skin contact may cause irritation. Chronic inhalation and ingestion
may cause effects similar to those of acute inhalation and ingestion. May cause cancer in humans.

First Aid Measures

Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin: Get medical aid. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation: Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician: Treat symptomatically and supportively.

Halocarbons in general are potentially dangerous alkylating agents. Bromides are better alkylating agents than chlorides, thus exposure to Bromoethane should be minimized. Bromoethane is classified by the State of California as carcinogenic and a reproductive toxin.

Respiration, the transportation of oxygen to cells within the body, and then the reverse with carbon dioxide going out of the body, is often confused with the act of breathing. Although they are both necessary functions of the body, healthy respiration lays the ground work for normal breathing patterns.

The respiration process contains several parts, including ventilation (moving air into and out of the lungs), pulmonary gas exchange (exchange of gases between the alveoli and the pulmonary capillaries), gas transport (movement of gases within the pulmonary capillaries through the circulation to the peripheral capillaries in the organs, and then a movement of gases back to the lungs along the same circulatory route), and peripheral gas exchange (exchange of gases between the tissue capillaries and the tissues or organs, impacting the cells composing these and mitochondria within the cells).

For the ordinary person, this goes way beyond the scope of understanding of what goes into this process and what we need to know to effectively take care of our respiration system. However, it is important for everyone to know that there are steps that can be taken to strengthen respiratory function, as well as nasal passage health, immune system, and sinus strength.

Besides eating a healthy diet full of nutrients, exercising the recommended amounts, taking a multivitamin, and drinking lots of water, taking a respiratory supplement will also aid to strengthen these functions.

There are natural, organic supplements that are also caffeine-free, that will help to do this.They contain herbal extracts, are heart safe, and are usually gluten-free. These organic respiration supplements are completely safe and non-hazardous for adults as well as children. Being able to aide in creating healthy respiratory (and other systems) within your body is proactive, and will indeed ward off many illnesses and prevent serious health problems in the future.

If you were asked to name a region that contains an enormous amount of air pollution, what would come to mind? More than likely, you would think of heavily polluted metropolitan centers like Beijing or Los Angeles. Actually, you dont have to look at large scale cities to see significant pollution. This is because large quantities of air pollution already exist inside your own home. No, the pollution is not in the form of industrial chemicals. Common, average, everyday matter and items have the potential to create a home health hazard. That is why it is important to be on the lookout for problematic components that create a number of pollution related problems.

What common items can create a safety hazard inside the home? Believe it or not, something a seemingly benign as dust can create a hazard. If dust collects to the point its presence is so thick, the occupants are ingesting it when they breathe, something must be done as soon as possible. It is never a good thing to inhale pollutants. When collected in high enough volumes, the presence of dust in the air is not good for the occupants safety.

Mold is another problem that presents itself when without warning. Even if you clean your kitchen or bathroom regularly, mold may collect in small quantities. If you are not thorough in cleaning these rooms, a huge mold outbreak can occur. Much like dust, mold can present a number of respiratory hazards when its presence reaches high enough volumes. So, when cleaning the rooms is not enough, it becomes necessary to purchase a humidifier to completely rid the room of said mold.

And, yes, anytime you have chemicals in your home you will experience the risk of ingesting polluted air. Now, when people hear about chemical pollutants, they will assume you are referring to extremely potent and powerful pollutants. Well, have you varnished a table and now discovered the aroma of varnish vapors are in the air? Perhaps you have used bleach or ammonia to clean a room. Do you sense the acrid smell of these liquids? Is so, the air you are inhaling may be rife with impurities. Yes, air pollution can develop from any foreign substance that enters the air. There are many common household chemicals that can corrupt the air you breathe. Thats why you have to be very aware of their presence and air out a room when it gets to thick.