Updates from December, 2013 Toggle Comment Threads | Keyboard Shortcuts

  • admin 9:43 am on December 31, 2013 Permalink
    Tags: 100% Virgin Brazilian Hair, microsoft windows 7 home premium, ,   

    Functions of Portable ECG Recorder

    Electrocardiogram monitors or ECG machines are devices which are basically used to detect heart diseases and monitor the electrical activity of the heart. It is highly beneficial in detecting cardiovascular diseases. These machines can detect damaged and diseased tissues, rate of heartbeat, structural abnormalities, surgical repairs and so forth. It can also detect the effects of certain drugs on the heart.

    As it is one of the safest and least invasive methods, it is used by millions of cardiologists all over the world to detect the problems and functions of the heart. The electrocardiogram is depicted in the form of electrical waves which are represented on paper. These waves vary according to the health condition of the heart.

    Different Parts of an Electrocardiogram Machine:

    This machine is not a single instrument but a group of devices which work together to record and detect the activity of the heart. It reads the impulses of the heart and translates it into a graph style diagram. It is then printed on paper strips.

    Electrodes: The machine includes a set of lead wires which include small metal discs at the end of the wire. These discs are soft and adhesive which are attached to the arms, legs and chest to monitor and record the rhythm of the heart. These electrodes are attached to the main unit of the machine. Majority of the electrocardiogram machine utilize 12 electrodes to monitor the functions of the heart.

    Amplifier: The amplifiers are devices which receive the electrical signal from the electrodes and convert the information. These amplifiers include various sections and functions. The signal received from the human body is relatively weak and it must be amplified so that it can be stabilized. The amplifier includes a buffer amplifier and a preamplifier which help to convert the information so that it can be read by the output device. However, the amplifier is separated from the main unit of the machine so as to safe guard the patients from electrical shocks.

    Output Devices: The ECG machine includes various output devices such as a recorder which records and prints the ECG signal, computers, magnetic tapes, oscilloscopes and so forth. The final output of information includes a paper strip which indicates electrical signals. It can be used to diagnose heart disease and detect recent cardiac arrest and other abnormalities.

    Another common type of device includes the holter monitors which are basically portable machines that are used to diagnose abnormal heart rhythms. It is quite similar to the conventional types of devices but it includes various additional features. It includes a portable ECG recorder and three electrodes. The electrical output detected from the heart can be stored in this device so that it can be evaluated by the doctor.

    There are various types of electrocardiogram devices which can be bought from online stores easily. The two most common types of machines include the 3-lead and 5-lead machines which are portable. The 12-lead machine is another type of electrocardiogram machine which can be used to detect the activities of the heart from twelve different angles..
    Related reading:Portable ECG Recorder Voltage Protector microsoft windows 7 home premium 100% Virgin Brazilian Hair

     
  • admin 6:11 am on December 27, 2013 Permalink
    Tags: Carbon Fiber Product Manufacturer, , , wooden displays manufacturer   

    How to use Portable ECG Recorder
    Portable ECG/EKG Machines can help in early detection of abnormal heart rhythms.Atrial fibrillation,one of the abnormal heart rhythm is known to cause stroke,which can be debilitating disease for many individuals.

    Cardiovascular disease is what occurs when something in the heart blood vessel or its electrical activity isn’t working right. These diseases can be manifested in various types including as abnormal rhythms. There are many different types of abnormal rhythms of the heart. Atrial fibrillation
    is one such disorder, it is found in about 2.2 million Americans. During atrial fibrillation, the heart’s two small upper chambers (the atria) quiver instead of beating effectively. Blood isn’t pumped completely out of them, so it may pool and clot. If a piece of a blood clot in the atria leaves the heart and becomes lodged in an artery in the brain, a stroke results. About 15 percent of strokes occur in people with atrial fibrillation.

    ECG/EKG -Electrocardiogram monitors are devices which help health professionals to monitor electrical activity of the heart and detect any heart disease at an early stage. It is useful in patients who have irregular heart beat or abnormal heart rhythm like atrial fibrillation. Once, a patient has been diagnosed with an abnormal heart rhythm, they need to be monitored periodically. One of the main reasons is to prevent complications like stroke which can be debilitating especially in older age group.

    One of the major disadvantages of these monitors was that any person who had to undergo these tests had to visit a hospital or a healthcare provider center to perform these tests. But, now with portability of devices; it is possible to perform these tests at home.

    The small handheld devices enable people with abnormal heart conditions, to perform measurements of their heart electrical activity using these portable ECG device, and then take the results to their health care provider for evaluation. These portable ECG monitors are equipped with batteries and a small LCD screen which shows the hearts electrical activity. These devices are now advanced by adding “intelligence” which enables them to provide with features such as user alarms as well as performing local processing to detect the type of abnormal heart rhythms.

    They could be connected to the individual persons through the leads like the conventional ECG device in hospitals, or through the person’s hand using finger tips. Unlike the conventional ECG recorders which require aid of trained technicians to connect the wires to your body, Portable ECG Device requires only the person who is using to connect. These devices can be used only as a screening tool mainly with patients having a family history of heart attacks or strokes or are being treated for a heart condition. It can only be used as a screening device in fitness center for monitoring of Rhythms or in hospitals for evaluation of drugs in large number of patients.

    It has some limitations in that, it cannot be used as a replacement tool for conventional large ECG machines used in Hospitals and also it can be used in patients who have pacemakers installed in them and during pregnancy. The analysis of the results needs to been done by a qualified health care professional.

    Despite these drawbacks, it is still quite a handy tool to be in one’s home especially in individuals with susceptibility to abnormal heart rhythms.

    Portable ECG/EKG Machines like the Smartone ECG at http://www.dimetekus.com, which is using Artificial Intelligence Technology to monitor heart health intelligently,users can easily record the electrical activities of their heart using their finger tips.This can help in early detection of abnormal heart rhythms..
    Related reading:Portable ECG Recorder sony ps3 controller wooden displays manufacturer Carbon Fiber Product Manufacturer

     
  • admin 5:58 am on December 23, 2013 Permalink
    Tags: electronic cigarette juice, hid lights, Nylon bag,   

    What Is a Portable ECG Recorder
    We have seen doctors using Stethoscope to examine patients. By using the stethoscope doctors listen to the internal sounds of the body, especially heart beating, lungs,intestines etc. During each heart beat, small electrical signals are generated along with the sound. These electrical activity of human heart is
    measured and monitored by using electrocardiogram(ECG). Electrodes are
    attached to the outer surface of the skin, which detects the signals. These signals are amplified and recorded on ECG paper by ECG machine.

    For diagnosis and monitoring of heart and heart diseases different types of ECG is used.

    RestingECG
    A Resting Electrocardiogram (ECG) is used to analyse how the heart performs when the person is at rest. This test aids the doctor in evaluating the condition of the heart. It is also used to monitor patients who have undergone an angiogram,angioplasty, cardiac surgery or change in dosage of heart medication. The Resting ECG helps to detect a wide range of heart conditions and takes approximately 15-
    20 mins.Stress Test (Exercise ECG) The ECG obtained when the heart is working harder due to exercise or medication
    induced stress is termed exercise ECG, or stress test. This test is useful in detecting problems that may not be detected in a resting ECG. It also shows any abnormal flows of blood to muscle tissue. The stress test is done by trained personnel under a controlled environment.

    Stress test is used as a screening tool for people with coronary artery disease.This test can help predicting future heart attacks in people with multiple risk factors even if the person doesn’t have any heart disease

    Holter ECG
    A Holter monitor is a portable device for continuously monitoring the electrical activity of the cardiovascular system for at least 24 hours. The Holter monitor is named after its inventor, Norman J. Holter. The increased recording period can be useful for detecting arrhythmia,the condition in which the heart can beat too
    fast, too slow, or with an irregular rhythm. The electrodes are placed over bones to minimize the readings obtained from muscular activity. Most Holter monitors employ between three and eight electrodes. These electrodes are connected to a
    small piece of equipment that is attached to the patient’s belt or hung around the neck. This recorder keeps a log of the electrical activity of the heart.
    Holter monitoring is used mainly after a heart attack,to diagnose heart rhythm problems and when starting a new heart medicine.Monitoring in ICU
    Using the continuous measurement of the heart’s electrical activity, the ICU staff can monitor if the heart is beating abnormally fast or slow and if the heart is following a normal or abnormal rhythm. The ECG is one of the most common monitoring devices used in the hospital. The variations in the heart rate or rhythm
    may be the first sign of an adverse or abnormal development, and they help to alert the doctor or nurse. Thus it is a reliable and frequently used method of patient-monitoring in the ICUs.
    Monitoring in Operation Theatres
    Up to 86% of patients experience cardiac arrhythmia during anaesthesia and surgery. Many such occurrences are of clinical significance and therefore their detection is very important. The ECG monitor should always be connected to the patient before administration of anaesthesia. This will aid the anaesthetist in
    detecting changes in the heart rhythms (if any) during anaesthesia..
    Related reading:Portable ECG Recorder electronic cigarette juice hid lights Nylon bag

     
  • admin 5:54 am on December 18, 2013 Permalink
    Tags: acrylic displays manufacturer, daytime running lights, ,   

    wholesale Portable ECG Recorder 

    Cardiovascular disease is what occurs when something in the heart blood vessel or its electrical activity isn’t working right. These diseases can be manifested in various types including as abnormal rhythms. There are many different types of abnormal rhythms of the heart. Atrial fibrillation is one such disorder, it is found in about 2.2 million Americans. During atrial fibrillation, the heart’s two small upper chambers (the atria) quiver instead of beating effectively. Blood isn’t pumped completely out of them, so it may pool and clot. If a piece of a blood clot in the atria leaves the heart and becomes lodged in an artery in the brain, a stroke results. About 15 percent of strokes occur in people with atrial fibrillation.

    ECG/EKG -Electrocardiogram monitors are devices which help health professionals to monitor electrical activity of the heart and detect any heart disease at an early stage. It is useful in patients who have irregular heart beat or abnormal heart rhythm like atrial fibrillation. Once, a patient has been diagnosed with an abnormal heart rhythm, they need to be monitored periodically. One of the main reasons is to prevent complications like stroke which can be debilitating especially in older age group.

    One of the major disadvantages of these monitors was that any person who had to undergo these tests had to visit a hospital or a healthcare provider center to perform these tests. But, now with portability of devices; it is possible to perform these tests at home.

    The small handheld devices enable people with abnormal heart conditions, to perform measurements of their heart electrical activity using these portable ECG device, and then take the results to their health care provider for evaluation. These portable ECG monitors are equipped with batteries and a small LCD screen which shows the hearts electrical activity. These devices are now advanced by adding “intelligence” which enables them to provide with features such as user alarms as well as performing local processing to detect the type of abnormal heart rhythms.

    They could be connected to the individual persons through the leads like the conventional ECG device in hospitals, or through the person’s hand using finger tips. Unlike the conventional ECG recorders which require aid of trained technicians to connect the wires to your body, Portable ECG Device requires only the person who is using to connect. These devices can be used only as a screening tool mainly with patients having a family history of heart attacks or strokes or are being treated for a heart condition. It can only be used as a screening device in fitness center for monitoring of Rhythms or in hospitals for evaluation of drugs in large number of patients.

    It has some limitations in that, it cannot be used as a replacement tool for conventional large ECG machines used in Hospitals and also it can be used in patients who have pacemakers installed in them and during pregnancy. The analysis of the results needs to been done by a qualified health care professional.

    Despite these drawbacks, it is still quite a handy tool to be in one’s home especially in individuals with susceptibility to abnormal heart rhythms.

    .
    Related reading:Portable ECG Recorder daytime running lights acrylic displays manufacturer Nandrolone decanoate

     
  • admin 1:54 am on December 12, 2013 Permalink
    Tags: mens jewellry, , smoke detector,   

    Portable ECG Recorder manufacturers 

    A Holter monitor is a portable device that records the electrical activity of your heart for about 24 hours. Hence it is sometimes called a continuous ECG. While an ECG or an electrocardiogram also monitors the electrical activity of the heart, it provides a picture of the heart’s health only for a few seconds, in fact for the time it is administered. If doctors suspect a problem, they advise that the Holter monitor be used to study the heart’s electrical activity for a longer period.

    Why is this test performed?
    Doctors use this monitor to further investigate arrhythmias or irregular heartbeats. The heart may beat too fast (tachycardia) or too slowly (bradycardia) or irregularly.

    The Holter monitor is also deployed to detect myocardial ischemia. When this occurs, not enough oxygen rich blood is reaching the heart due to blockages in the arteries. Myocardial ischemia can also be the cause of irregular heartbeats.

    How is the test performed?
    A technician will place electrodes in different parts of your chest. If sweat or chest hair prevents the electrodes from sticking to the chest, the hair will be shaved. These sensors will be connected with wires to the monitor. You can carry the device in your pocket or around your waist. You will be asked to carry on normal activities throughout the duration of the test. You will be given a form or a diary to record any abnormal events like dizziness, irregular heartbeats, or chest pain. You will be asked to note the time of such events.

    You will be advised not to shower during the duration of the test. Upon completion of the test, the monitor will be returned to the cardiac center. The data is analyzed by the technician and the results forwarded to your physician.

    Results
    Your physician will analyze the results and compare them to any untoward events you may have recorded in the form you will submit to the physician.
    The doctor may be able to diagnose your cardiac problems after examining the results from the Holter monitor.

    Abnormal results could include arrhythmia or irregular heart rhythms or a heart block. If this device fails to show any abnormalities, then further tests may be ordered.

    Risks
    There are no risks to the patient wearing a Holter monitor. There may some inconvenience to you since you will not be able to shower while the monitoring of the heart is under way. While wearing the device, patients are advised to avoid metal detectors, magnets and electric blankets.

    .
    Related reading:Portable ECG Recorder Voltage Protector smoke detector mens jewellry

     
  • admin 8:28 am on December 10, 2013 Permalink
    Tags: concrete mixer parts, ecig, parking sensor,   

    Best Portable ECG Recorder Supplier-DIMETEK Digital Medical Technologies Ltd
    Electrocardiogram monitors or ECG machines are devices which are basically used to detect heart diseases and monitor the electrical activity of the heart. It is highly beneficial in detecting cardiovascular diseases. These machines can detect damaged and diseased tissues, rate of heartbeat, structural abnormalities, surgical repairs and so forth. It can also detect the effects of certain drugs on the heart.

    As it is one of the safest and least invasive methods, it is used by millions of cardiologists all over the world to detect the problems and functions of the heart. The electrocardiogram is depicted in the form of electrical waves which are represented on paper. These waves vary according to the health condition of the heart.

    Different Parts of an Electrocardiogram Machine:

    This machine is not a single instrument but a group of devices which work together to record and detect the activity of the heart. It reads the impulses of the heart and translates it into a graph style diagram. It is then printed on paper strips.

    Electrodes: The machine includes a set of lead wires which include small metal discs at the end of the wire. These discs are soft and adhesive which are attached to the arms, legs and chest to monitor and record the rhythm of the heart. These electrodes are attached to the main unit of the machine. Majority of the electrocardiogram machine utilize 12 electrodes to monitor the functions of the heart.

    Amplifier: The amplifiers are devices which receive the electrical signal from the electrodes and convert the information. These amplifiers include various sections and functions. The signal received from the human body is relatively weak and it must be amplified so that it can be stabilized. The amplifier includes a buffer amplifier and a preamplifier which help to convert the information so that it can be read by the output device. However, the amplifier is separated from the main unit of the machine so as to safe guard the patients from electrical shocks.

    Output Devices: The ECG machine includes various output devices such as a recorder which records and prints the ECG signal, computers, magnetic tapes, oscilloscopes and so forth. The final output of information includes a paper strip which indicates electrical signals. It can be used to diagnose heart disease and detect recent cardiac arrest and other abnormalities.

    Another common type of device includes the holter monitors which are basically portable machines that are used to diagnose abnormal heart rhythms. It is quite similar to the conventional types of devices but it includes various additional features. It includes a portable ECG recorder and three electrodes. The electrical output detected from the heart can be stored in this device so that it can be evaluated by the doctor.

    There are various types of electrocardiogram devices which can be bought from online stores easily. The two most common types of machines include the 3-lead and 5-lead machines which are portable. The 12-lead machine is another type of electrocardiogram machine which can be used to detect the activities of the heart from twelve different angles.

    .
    Related reading:Portable ECG Recorder parking sensor ecig concrete mixer parts

     
  • admin 5:58 am on December 6, 2013 Permalink
    Tags: ABS fairings, Curtain Rods, ,   

    Test for Portable ECG Recorder 

    Electrocardiogram, widely known as ECG or EKG (Elektrokardiogram in German/Dutch), is a common cardiac test which helps in detecting various cardiac abnormalities. This test is mainly done to test the electrical activity of the heart.

    The electrical activity of the heart is represented by an electrocardiograph reproduced by a tool or software called ECG Simulator. There are different kinds of simulators with different number of leads (10 or 12) and types of patient cables. The compatibility of the leads and patient cables should always be checked with the diagnostic equipment.

    A normal ECG records problems with the heart’s rhythm and the conduction of the heart beat. It helps discover different problems and also a patient’s response to the treatment.

    ECG can be done when there are symptoms of chest pain (angina), difficulty in breathing, fainting and palpitations. It can show evident disease in coronary arteries and the effect of medications on it. It can also reveal a previous heart attack or the cause of slow or fast heart beat. It can also help to demonstrate thickening of a heart muscle and to know the mineral content in the blood. However, ECG is not an exhaustive test and it may not trace an underlying significant heart disease, hence other tests are needed. One can also read about it or watch the top medical videos online to gain more information about it.

    Electrocardiogram ECG is a harmless test with no danger at all. This test is usually taken when patient is completely at rest. But sometimes the disease or thickening of coronary arteries is not detected and hence an exercise test is performed. The patient may get chest pain which would be resolved after the exercise is stopped. Exercise test should be done in supervision of the doctors and the ECG technicians. The test can be discontinued in case of major chest pain, drop in BP, changes on ECG or achievement of target heart rate.

    An ECG is performed with 10 or 12 self adhesive electrodes (or cables) attached to arms, legs and chest on clean and shaved skin. The test is harmless and it does not even take a minute once the leads are in position. The doctor then gives suggestions after reviewing the paper print out of ECG.

    As the ECG test is not the ultimate and it has to be supplemented with other tests, the options are radioisotope perfusion scan – which uses low dosage radioactive dye to show the areas having good and bad supply of blood or angiography – which is the X-ray examination, for determining illness and its cause.

    .
    Related reading:Portable ECG Recorder sony ps3 controller ABSĀ  fairings Curtain Rods

     
  • admin 6:42 am on December 2, 2013 Permalink
    Tags: , , Sanitary ware for sale   

    aloe vera juice suppliers 

    Israel’s Missing Option to Defuse Iran Threat

    To keep “all options on the table” in the U.S. – Israel plans to change the incumbent Syrian and Iranian regimes and neutralize what both countries perceive as an imminent “threat” is a formula missing the only feasible option to defuse their perceived threat peacefully, which is obviously much cheaper in money and human souls.

    On August 19, Israeli former head of the Operations Directorate of the Israeli military, Maj. Gen. (res.) Uri Saguy, wrote in Haaretz that late Israeli Prime Minister Yitzhak “Rabin strove to achieve agreements with our neighbors before the Iranians got a bomb LED floodlight. If we had peace accords today with the Arab countries and with the Palestinians, what exactly would the Iranians’ conflict with us be about?”

    Giving priority to making peace with Syria, Lebanon and the Palestinian people on the land – for – peace basis, which is the essence of the Arab Peace Initiative proposed by the 22 – member states of the Arab League in 2002, would disarm Iran of its Arab, Palestinian credentials and create a new regional environment that would in turn render any Arab alliance with Iran unnecessary and would uncover Iranian regional expansion as an endeavor sought per se by Tehran.

    Instead, Israel is running away from peace making to warmongering, risking embroilment of the United States in a war on Iran that Washington does not want, at least for now.

    Four-star chairman of the US Joint Chiefs of Staff Martin Dempsey said on August 19 that he has been conferring with his Israeli counterpart Benny Gantz on a regular “bi-weekly” basis and “we’ve admitted to each other that our clocks are turning at different rates.” Israel’s envoy to Washington, Michael Oren, acknowledged in a CNN interview the following day that Israel’s clock was ticking faster than Washington’s.

    Iran’s Supreme Leader Ayatollah Ali “Khamenei has not ["probably"] given orders to start building a [nuclear] weapon,” according to Israeli defense minister Ehud Barak in a CNN interview on April 20; His Iranian counterpart Ahmad Vahidi this week dismissed Israeli warmongering as “psychological war;” General Martin Dempsey cautioned against an Israeli strike saying it would not destroy Iran’s nuclear program; President Shimon Peres last week joined senior security, military and political experts to warn against a unilateral Israeli strike not coordinated with the U.S Sanitary ware for sale.

    In the RAND Review for spring this year, Ambassador James Dobbins, who directs RAND’s international security and defense policy center, and three expert analysts argued that “an Israeli or American attack on Iranian nuclear facilities would make it more, not less, likely that the Iranian regime would decide to produce and deploy nuclear weapons. Such an attack would also make it more, not less, difficult to contain Iranian influence.”

    Nonetheless, Benjamin Netanyahu’s government has been beating the drums of war, linking the Iranian “threat” to a second holocaust (a comparison dismissed by Nobel Laureate and Holocaust survivor Elie Wiesel). His newly appointed home front defense minister, Avi Dichter, says, “Israel’s existence is threatened.” Israel’s top-tier missile defense system was announced upgraded and missile alert system tested. In a nationwide experiment to continue through Thursday, text messages warning of incoming missiles are being sent to cellphone users. Gas mask centers have already distributed more than four million masks.

    Israeli warmongering is creating, in Saguy’s words, an “orchestrated and purposely timed hysteria” in Israel as if “someone is lighting a fire, then yelling that it has to put out.”

    Financial markets are shivering, foreign investors are on guard, Israeli new shekel is growing increasingly weaker against the dollar and Pnina Grinbaum, a 55-year-old government clerk in Jerusalem, was quoted by the Associated Press on August 16 as saying: “I’m very afraid. I want peace, not war.”

    The international stand – off on Iran’s nuclear program as well as on the Syrian crisis is very tightly linked to the impasse, which saw the Arab and Palestinian – Israeli peace process reach a dead end.

    The Syrian crisis in particular is more closely tied to the impasse in the Arab – Israeli conflict. De-linked from this conflict, it would boil down to an internal crisis that could be easily solved by Syrians themselves.

    Regional and international involvement in the Syrian crisis has nothing to do with the internal crisis per se, but has exploited the internal crisis because it has a lot to do with the U aloe vera juice.S. – Israel plans to isolate and contain what both countries perceive as an Iranian regional threat to their interests.

    To this end, Israel and U.S. are now doing all what they can to break the alliance between Iran and Syria and the Syrian bridge linking Iran to Lebanese and Palestinian movements resisting Israeli military occupation, thus cutting off Iran from the Mediterranean, as well as depriving these movements from their Syrian support, by coordinating a ‘regime change” in Damascus.

    For four years since Benyamin Netanyahu came to power, Israel risked a confrontation with the U.S. administration of President Barak Obama over his order of priorities in the Middle East, which gave precedence to reaching a negotiated political settlement for the Palestinian – Israeli conflict as a precondition to building up a U.S., Arab and Israeli front against Iran.

    Netanyahu advocated a reversed order of priorities and has succeeded in pushing the Palestinian – Israeli conflict down from the top of U.S. regional agenda in favor of solving the U.S. – Israeli Iranian debacle first.

    This rearrangement of Israel – U.S. priorities has marginalized the Arab – Israeli “peace process” to the extent that both countries feel relaxed enough now to feel free from any serious commitment to resume it.

    However, developments prove this rearrangement of priorities counterproductive and playing in Iranian hands, making the regional Iranian alliances stronger, perpetuating the Syrian crisis, around which a new multi-polar world is emerging, and sidelining the Palestinian peace partners, leaving them with no other option but to take their deadlocked peace process to the United Nations, to bring back on track the Palestinian – Israeli conflict to the top of the international agenda in the Middle East, thus creating a fait accompli that will make impossible the Arab – Israeli – U.S. front against Iran that Washington has been trying to build up over the past few years.

    Cornering the Palestinians longer in their United Nations option, similarly changing nothing on the ground to end the Israeli military occupation, would in no time see them loosing faith in peace making to be pushed involuntarily to realign regionally to the other side, which would exacerbate the Iran “threat” rather than containing it.

    • Nicola Nasser is a veteran Arab journalist based in Bir Zeit, West Bank of the Israeli-occupied Palestinian territories. He can be contacted at nassernicola@ymail .

    Order by http://www.smartcardchn.com/RFID-Card_c7

     
c
compose new post
j
next post/next comment
k
previous post/previous comment
r
reply
e
edit
o
show/hide comments
t
go to top
l
go to login
h
show/hide help
shift + esc
cancel