Dental treatment Troubleshooting

Check the power supply is normal, pressing the up and down around the key, no action chair. Remove the front cover of the patient chair at check circuit control board labeled AC24V, ACl2V terminals, voltage is normal, and then check the gas control switch control loop is not closed, resulting in the control loop can not be connected. Reason: fixed air control switch screws loose, the valve can not be effectively depressed limit switch. Remedy: Readjust distance gas control valves and limit switch to ensure that the rated pressure under the limit switch can be reliably connected to the fastening screws.



Press the key patient chair up and down before and after, you can hear the sound of relay, but the chair does not move, this phenomenon indicates that the control loop, no problem. Check AC24V, ACl2V normal. Wherein ACl2V control circuit power supply, AC24V for the DC power supply. After checking the rectified voltage, no DC24V output. View check circuit control board found scorch marks near DC24V rectifier bridge rectifier bridge which measures the arms has breakdown, because there is no DC24V, so although the relay pull, but because of the lack of electrical power, so the chair does not work. Analysis of reasons: The first element is the quality, but off, the second motor stall, causing a short circuit. Check the motor continue down the normal, excluding the second reason. Remedy: Since the control circuit printed wiring board near the bridge rectifier has been blown, only replace the rectifier bridge to cause difficulties, decided to replace the entire board. Should be replaced with a new board of the original 1203 chip circuit board mounted to unplug the new board to continue to use the original data store. Remove the wires, connectors and other color-coded according to its original position and connected, power-commissioning work chair.

Pressing on the best dental chair, down, front, back key, the chair does not move nor relay sound. Open the front cover inspection, AC-DC power supply is normal, if the plugs, no loose wiring, gas control switch is turned good. You should check the key signal line is normal. Inspection method: Unplug the control circuit board signal line plug, a wire with a black line termination socket end and the other end on the other electrodes respectively touch the socket, observe whether the relay operation, the corresponding indicator light is illuminated. As compared with the normal signal conductors have a problem, the most likely reason is that the common black line is broken, identify the point of failure can be treated. If during the test relay no action, then the control board is faulty, replace the circuit control board.

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Introduction and types of spectrum

Spectra pattern polychromatic light after dispersion system (such as a prism, a grating) spectrophotometry, was spread by the monochromatic color wavelength (or frequency) and size in order of priority, called the spectrum. The largest part of the spectrum is a part of the visible spectrum of the electromagnetic spectrum visible to the human eye, in the wavelength range of visible light is referred to as electromagnetic radiation. Spectrum does not contain all the colors of the human brain visual that can be different, such as brown and pink.

Light is made up of atoms within the movement of electrons generated. The movement of atoms of various substances different internal electronics, they are also different light emission. Case studies of different luminescent material that absorbs light and has important theoretical and practical significance, has become a specialized discipline spectroscopy. The following outlines some of the knowledge spectrum.

Spectroscope spectroscopic observation of spectrum use, here we speak about construction principles spectroscope. Spectroscope constructed by the collimator, consisting of prism and telescope tube.



Spectral Type:
Spectrum emission spectrum emitting objects directly called emission spectrum. Emission spectra of two types: continuous spectrum and bright line spectrum;
Continuous distribution contains various colored light from red to violet spectrum, called a continuous spectrum. Hot solid, liquid and high-pressure gas emission spectrum is a continuous spectrum. Such as light, the light emitted by hot molten steel lamp filaments are emitted a continuous spectrum.

Only contains some discontinuous bright line spectrum is called bright line spectrum. Bright line spectrum of the bright line is called the line, each corresponding to a different spectral line wavelength light. Emission spectrum rarefied gas or metal vapor is bright line spectrum. It is a bright line spectrum of atomic emission free state, also called atomic spectroscopy.

Observation of a solid or liquid substance atomic spectrum, you can put them into the gas lamp flame or arc to burn, so that they gasification light, you can see them in the bright line spectrum from a spectroscope.

Experiments show that, atoms of different, bright line emission spectra are different, atoms of each element has a certain bright line spectrum. Each atom can only emit certain wavelengths of light has its own characteristics, so the bright line spectrum, called spectral lines characteristic lines atoms. By atomic characteristic lines can identify the structure of matter and the study of atoms.

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Cleaning Dental Chair

Portable ultrasound for sale MSLPU04 Operating Video

Non-invasive and invasive ventilator ventilator differences and relations

Clinical application of mechanical ventilation with new theories and new technologies, the results of numerous studies EBM constantly rewriting the concept of clinical staff, so we need to update the view, the idea of ​​understanding non-invasive, invasive positive pressure ventilation in the treatment of respiratory failure of this traditional and new topics.

Clinical application of positive pressure ventilation, including non-invasive and invasive ventilation section. Noninvasive positive pressure (Noninvasivepositivepressureventilation, NPPV) refers to the need to create artificial airway positive pressure ventilation mode, the clinical application of multi-nose and mouth mask or nasal mask positive pressure ventilation, in addition there is also a full-face, stuffy nose and other ways NPPV therapy . Invasive positive pressure ventilation (Invasivemechanicalventilation, IMV) refers to positive pressure ventilation mode through the establishment of artificial airway (nasal or intubation, tracheotomy) performed. Non-invasive ventilation and invasive ventilation, compared with a simple setting, patients are easy to accept, is not easy to secondary lung injury and pulmonary infection and other characteristics, but it was also synchronous machines is poor, unstable tidal volume, is not conducive to the airway secretion drainage and other shortcomings.



Prospects:
Although there noninvasive and invasive mechanical ventilation has some differences, but we should look at both the two important means of clinical treatment of respiratory failure or mechanical ventilation mode is a disease at different stages, and therefore non-invasive and invasive ventilation between closely linked. As AECOPD (chronic obstructive pulmonary disease) can be applied NPPV in patients with early treatment, if further aggravate the condition can be IMV treatment, the condition can be alleviated once early extubation continue NPPV therapy to avoid complications of invasive mechanical ventilation. Clinically often this is the case, ICU doctors re-invasive ventilation and neglect non-invasive ventilation , respiratory part of doctors and too much emphasis on the importance of non-invasive ventilation; and domestic and foreign literature are mostly the non-invasive and invasive ventilation separate elaborate, this will inevitably lead to artificially separate the two. It is gratifying to many scholars at home and abroad in recent years, more and more emphasis on non-invasive and invasive mechanical ventilation of the close relationship between the two is bound to the correct application of more patients with respiratory failure to bring the Gospel.

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Vomiting gastric lavage operation methods and precautions

That surgery gastric lavage gastric lavage, refers to certain components of the liquid poured into the stomach cavity, and the mixture then extracted stomach contents, so repeatedly. Its purpose is to clear the stomach is not absorbed or toxicological cleaning gastric cavity, the stomach surgery, examination preparation. For acute poisoning swallow as organic phosphorus, inorganic phosphorus, alkaloids, and other drugs to Bobby, gastric lavage is an extremely important rescue measures. Gastric lavage gastric lavage surgery patients have vomiting, stomach surgery gastric lavage, laparotomy gastric lavage stoma surgery three kinds. The focus here vomiting gastric lavage methods.

Vomiting, gastric lavage surgery:
Vomiting is the body eliminate stomach poison instinctive reaction of self-defense. Vomiting due to gastric lavage technique is simple, the service shortly poison, and conscious patients with acute poisoning (except clothing corrosive poison, petroleum products and esophageal varices, upper gastrointestinal bleeding, etc.) is an effective self-help rescue scene, mutual aid measure.

Indications
1. conscious, having a gag reflex, and can cooperate with the acute poisoning, should first encourage oral gastric lavage.
2. oral toxicant time soon, within 2h best.
3. self-help in the field without the tube.

Contraindications
1. disturbance of consciousness.
2. seizures, uncontrolled seizures before.
3. uncooperative patient, who refused to drink.
4. clothes and petroleum products, such as corrosive poison acute poisoning.
5. associated with upper gastrointestinal bleeding, aortic aneurysm, esophageal varices and the like.
6. pregnant women and the elderly.



method
1. the first patients do ideological work, specifying the requirements and methods to obtain the cooperation is conducive to the smooth progress of the operation.
2. the patient was sitting, a large number of frequent oral gastric washing about 400 ~ 700ml, to the patient a sense of expansion for the degree of saturation.
3. then take the spatula or bamboo chopsticks (all wrapped with gauze) in patients with pharyngeal stimulation, can cause reflex vomiting, gastric lavage fluid or discharge of gastric contents. So repeatedly, until a clear, odorless discharge of gastric washing up.

Precautions
1. induce vomiting after gastric lavage should immediately rushed to a nearby large hospital, as appropriate, the implementation of gastric intubation gastric lavage technique.
2. vomiting, gastric lavage should be careful aspiration, due to severe vomiting may induce acute upper gastrointestinal bleeding.
3. pay attention to drink intake and discharge amount approximately equal.

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