Complete breath

The lethal oral dose in humans is probably around 100, but doses as low as 16 mg have reportedly been fatal whereas doses of 2 000 mg have been survived. After ingestion, effects usually occur within 10-30 minutes and include stiffness of the face and neck muscles and increased reflex excitability. Strychnine acts by altering nerve impulses in the spinal cord, resulting in a decreased threshold for stimulation, and, hence, a hyperexcitable state. Any sensory stimulus may produce a violent motor response that, in the early stages of intoxication, tends to be a coordinated extensor thrust and, in later stages, may be a tetanic convulsion with opisthotonos anoxia and cyanosis develop rapidly. Between convulsions, muscular relaxation is complete, breathing is resumed, and cyanosis lessens. Because sensation is unaffected, the convulsions are painful and lead to overwhelming fear. As many as 10 convulsions separated by intervals of 10-15 minutes may be experienced, but death often occurs after the second to fifth convulsion, and even the first convulsion may be fatal if sustained death is commonly due to asphyxia.If recovery occurs, it is remarkably prompt and complete despite the violence of the illness muscle soreness may persist for a number of days. ... 

Leaks can readily be detected by the dense white fumes formed by boron trifluoride in moist air or by its sharp and irritating odor. Emergency personnel equipped with complete breathing, eye, and skin protective equipment are the only ones who should respond to correct leaks others should leave the area at once until the leak(s) have been stopped and the area has been thoroughly purged of vapors and secured. Emergency procedures for dealing with leaks should be fully established and practiced in advance. 

Anhydrous lithium hydroxide [1310-65-2], LiOH, is obtained by heating the monohydrate above 100°C. The salt melts at 462°C. Anhydrous lithium hydroxide is an extremely efficient absorbent for carbon dioxide (qv). The porous stmcture of the salt allows complete conversion to the carbonate with no efficiency loss in the absorption process. Thus LiOH has an important role in the removal of carbon dioxide from enclosed breathing areas such as on submarines or space vehicles. About 750 g of lithium hydroxide is required to absorb the carbon dioxide produced by an individual in a day. 

The large candles used by the U.S. Navy have been produced ia the United States by three companies. Mine Safety AppHances Company, Puritan-Beimett Corporation, and Scott Aviation. These sell for 50— 60. Production is less than 10,000/yr. Smaller candles incorporated ia breathing apparatus are produced by equipment suppHers. Production quantities are tied to the number of complete units and the candles are a small percentage of the total price. Production for aircraft oxygen supply during a decompression incident is about 50,000 units per year. In the United States, Puritan-Beimett and Scott Aviation are the primary suppHers as is Draeger in Germany. 

Compressor systems for respirators should be completely separate from other uses. Air compressors that are designed to produce breathing-quahty air are required. In smaller systems, it may be preferable to use botded air rather than a compressor. The contents of bottles, however, should be analy2ed to ascertain that they do contain air and to assure that the concentrations of any contaminants are acceptably low. 

Through the efforts of the Certified Color Industry and the FDA, a new law was formulated, the Color Additives Amendments of 1960 (PubHc Law 86-618) (21). The amendments provided a breathing speU by allowing the continued use of existing color additives pending the completion of... 

Breathe freely a workers information card on respiratory sensitizers The complete idiot s guide to CHIP 2... 

Health Hazards Information - Recommended Personal Protective Equipment Protective clothing should be worn when skin contact can occur. Respiratory protection is necessary when exposed to vapor. Complete eye protection is recommended Symptoms Following Exposure Breathing of vapors... 

Health Hazards Information - Recommended Personal Protective Equipment Self-contained breathing apparatus complete protective clothing safety glasses face shield Symptoms Following Exposure Inhalation causes severe irritation of upper respiratory system. Contact with liquid or vapor causes severe bums of eyes and can cause ulcers and blindness. Contact with skin causes severe burns. Ingestion causes severe burns of mucous membranes General Treatment for Exposure Get immediate... 

Protection factors based on the ratio of the breathing zone concentration to the concentration inside the enclosure have been defined. Without complete mixing of air inside the enclosure, considerable variations in the concentration are expected. The best evaluation for enclosure concentration without complete mixing is the measurement of the concentration in the exhaust duct. 

Almost all of the biomedical research done in the 25 years following the liquid-breathing work was conducted with commercially available fluorocarbons manufactured for various industnal uses by the electrochemical Simons process (fluonnation in a hydrofluoric acid solution) or the cobalt fluoride process (fluori-nation with this solid in a furnace at about 200 C) These processes tended to yield many by-products, partly because they were, to some extent, free radical reactions and partly because it was difficult to easily achieve complete fluonnation Aromatic hydrocarbons gave better products with the cobalt tnfluonde [73] method, whereas saturated hydrocarbons yielded better products with fluonnation using diluted or cooled gaseous fluorine (Lagow) Incompletely fluormated matenal was either... 

Cellophane is an old and respected packaging material which has been improved over the years. The two general types are coated with nitrocellulose (N/C) and polyvinylidene chloride (PVDC), respectively. Nitrocellulose-coated cellophane is moisture proof and useful for packaging dry products. It does not exclude oxygen or moisture completely, but for noncritical products it is entirely satisfactory. Baked goods are often packaged in this breathing type film. It is often used for cookies, candies, and rolls because its lack of taste and odor makes it very compatible with these products. 

Isocyanates are quite toxic materials and need careful handling. They affect mainly the respiratory tract causing breathing difficulties, sore throats and, in extreme cases, bronchial spasms. Once they have been allowed to react, for example to form foams, they undergo complete conversion and appear to leave no toxic residues. 

Children are affected by methyl parathion in the same manner as adults. Exposure to high levels of methyl parathion, even for short periods, may result in changes in the nervous system, leading to headaches, dizziness, confusion, blurred vision, difficulty breathing, vomiting, diarrhea, loss of consciousness, and death (see also Section 1.5 for a more complete description of how methyl parathion affects human health). It is not known whether children are more sensitive to the effects of methyl parathion than adults. There is some indication that young rats may be more sensitive than adults to nervous system effects. 

Because complete containment is physically impracticable in many cases, local exhaust ventilation is often applied to remove contaminants. The objective is to extract pollutant as near as practicable to its source and before it enters, or passes through, a worker s breathing zone. Vents should lead away from personnel, with scrubbing/filtering as appropriate. Common examples are ... 

BP, blood pressure BUN, blood urea nitrate CBC, complete blood cell count ECC, electrocardiogram HF, heart failure HR, heart rate K+, potassium SCr, serum creatinine SOB, shortness of breath. 

Because of their inability to breathe, patients are generally anxious and may be agitated. In severe acute asthma, patients may be unable to communicate in complete sentences. 

N, nausea D, diarrhea HA, headache SOB, shortness of breath HTN, hypertension LFTs, liver function tests CBC, complete blood count ISR, injection-site reactions IR, infusion reactions IV, intravenous MYL, myelosuppression (watch for fever, symptoms of infection, easy bruisability, and bleeding) SC, subcutaneous. 

With adequate treatment, most cases of contact dermatitis should improve within 7 days. Complete resolution of symptoms may take up to 3 weeks.12 If a patient experiences severe symptoms associated with fever or difficulty breathing, they should be instructed to seek medical attention immediately. Furthermore, patients should return to their health care provider if any of the following occur ... 

A third generally accepted source of values is the collection of TLVs (Threshold Limit Values) published by the American Conference of Governmental Industrial Hygienists (9) and utilized by the Occupational Safety and Health Administration. Conversion of these to Dp (10) involves three factors The first is division by 7/5 (= 1.4) to convert from a normal 5-day workweek to a 7-day exposure week. The second is division by 100 this allows for exceptionally sensitive individuals, who would not normally be part of the work force, and takes into consideration the completely involuntary and unsuspected nature of the exposure. The third factor converts from TLV (expressed in mg m-3) to a total dose the breathing rate, RB, for a 70-kg person (BW = body weight) doing light work is taken as 12.1 m3/8-hr day (10). Thus,... 

---