CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph Quick reference guide Powering the electrocardiograph The electrocardiograph runs on AC or battery power. Plug the electrocardiograph into AC power as often as possible so that the built-in charger can keep the battery charged. Regardless of the battery condition, you can use the electrocardiograph whenever it is plugged in. WARNING When you use AC power, always plug the electrocardiograph into a hospital-grade outlet to avoid the risk of shock.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph Attaching the leads to the patient Proper lead attachment is important for a successful ECG. The most common ECG problems are caused by poor electrode contact and loose leads. Follow your local procedures for attaching the leads to the patient. Here are some common guidelines. To attach the leads to the patient 1. Prepare the patient. • Describe the procedure. Explain the importance of holding still during the test.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph 3 • For disposable tab electrodes: Place the electrode tab between the “jaws” of the connector. Keep the tab flat. Verify that the metal portion of the connector makes contact with the skin side of the electrode tab. • For all disposable electrodes: Lightly tug on the connector to ensure that the lead is securely attached. If the electrode comes off, replace it with a new electrode. If the connector comes off, reconnect it.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph Electrode locations AHA IEC Location A V1 (red) C1 (red) Fourth intercostal space at the right sternal border. B V2 (yellow) C2 (yellow) Fourth intercostal space at the left sternal border. C V3 (green) C3 (green) Midway between V2 and V4. D V4 (blue) C4 (brown) Fifth intercostal space to the left of the midclavicular line. E V5 (orange) C5 (black) Anterior axillary line at the same horizontal level as V4.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph 5 AHA IEC I RL (green) N (black) J RA (white) R (red) Location Just above the right ankle. Just above the right wrist on the inside of the arm.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph About the test types Auto ECG A report typically showing a 10-second acquisition of 12 leads of ECG information combined with patient data, measurements, and optional interpretation. Auto ECGs can be saved to the electrocardiograph’s test directory or to a USB mass-storage device. In CP 50 Plus models, auto ECGs can also be sent to a Welch Allyn CardioPerfect workstation.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph 7 Performing an ECG test 1. Attach the leads to the patient. Any flashing dots on the lead-status screen indicate unattached or poorly attached leads. When all leads have been attached for several seconds, the ECG preview screen appears. Leads button Gain button (size) Speed button Filters button 2. If an Artifact message appears, minimize the artifact, as described under Troubleshooting.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph • The Search button gives you access to patient data in the test directory or in a connected database (CardioPerfect workstation or EMR). • The Worklist button (CP 50 Plus only) gives you access to patient data in the worklist. 5. If a Waiting for 10 (or 20) seconds of quality data message appears, at least 10 or 20 seconds of ECG data have been collected with excessive artifact.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph 9 Loading the thermal paper The electrocardiograph prints on z-fold thermal paper or roll thermal paper. • Store the paper in a cool, dry, dark place. • Do not expose it to bright light or UV sources. • Do not expose it to solvents, adhesives, or cleaning fluids. • Do not store it with vinyls, plastics, or shrink wraps.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph To load a roll of thermal paper
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph 11 About the menu The menu provides access to the saved patient tests, the settings, and the service functions. From either of the main screens, you can reach the menu by touching the menu button.
CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph
Troubleshooting Lead-quality problems “Artifact” message on the screen Artifact is signal distortion that makes it difficult to accurately discern the waveform morphology. Causes • The patient was moving. • The patient was shivering. • There is electrical interference. Actions See actions for wandering baseline, muscle tremor, and AC interference. Wandering baseline Wandering baseline is an upward and downward fluctuation of the waveforms.
Troubleshooting Muscle tremor Causes • The patient is uncomfortable, tense, nervous. • The patient is cold and shivering. • The exam bed is too narrow or short to comfortably support arms and legs. • The arm or leg electrode straps are too tight. Actions • Verify that the patient is comfortable, warm, and relaxed. • Check all electrode contacts. • If interference persists, turn the muscle-tremor filter on. If interference still persists, the problem is probably electrical in nature.
Troubleshooting 15 Lead alert or square wave A dot might be flashing on the lead-status screen. Or one or more leads might appear as a square wave. Causes • Electrode contact might be poor. • A lead might be loose. • A lead might be defective. Actions • Replace the electrode. • Verify that the patient’s skin has been properly prepared. • Verify that electrodes have been properly stored and handled. • Replace the patient cable.
Troubleshooting System problems The electrocardiograph won't turn on when it is plugged in Causes • The AC power connection is faulty. • An AC fuse is blown. • There is no AC power. Actions • Check the AC power source. • Check the AC fuses. The electrocardiograph won't turn on when it is unplugged Causes • The battery is disconnected or incorrectly connected. • The battery is low, not charging, depleted, or bad. Actions • Check the battery connections. • Recharge the battery.
Troubleshooting The electrocardiograph does not respond when you press buttons or touch the screen Causes • The electrocardiograph is frozen. Actions • Reset the electrocardiograph by pressing and holding the power button for at least six seconds until the screen goes blank. Press the power button again. The electrocardiograph goes through some diagnostic tests that cause it to take longer than usual to power up. Note For more troubleshooting guidelines, see the service manual.
Consult operating instructions/directions for use (DFU). A copy of the DFU is available on this website. A printed copy of the DFU can be ordered from Welch Allyn for delivery within 7 calendar days. For information about any Welch Allyn product, contact Welch Allyn Technical support: www.welchallyn.com/about/company/locations.htm. Mat. 105781 Ver.
