Introduction
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ABPM50 is a handhold ambulatory blood pressure monitor, which is designed according to oscillography theory. The device could monitor human body blood pressure up to 24 hours continuously and dynamically, providing accurate basis for the diagnosis. It is applicable for using in hospital, clinic and other medical institutions.
Main Features
1)Compact and portable, user-friend interface, easy to use
2)Patient range: adult, pediatric, neonate
3)24 hours ambulatory NIBP monitoring function, up to 350 groups of ambulatory NIBP data can be recorded for once.
4)Perfect combination of automatic and manual measurement method, up to 300 groups of data can be recorded for once by manual measure.
5)High-definition color TFT display, strong visibility
6)By data review interface such as 'data list','trend graph','big font', NIBP data is clear at a glance
7)Display of low power prompt, alarm, error message and time
8)Supply two kinds of unit: mmHg / kPa
9)Display interface can be switched between Chinese and English
10)Parameter alarm dispose function is optional
11)Communicate with PC, PC software can achieve data review, measured results analysis, view of trend graph, reports printing and other functions
Software features:
1）Connect to the device by USB interface.
2）Download NIBP measure result from the terminal device.
3）Display of scoop-shape trend graph, filling-type trend graph, histogram, pie chart, correlation line graph.
4）Edit every piece of NIBP data, and add annotation to it.
5）Edit basic information, doctor's advice, NIBP status instruction, current medicine-taken information, etc.
6）Support report printing and print preview.
- Pulse Oximeter
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Ambulatory blood pressure monitoring: Caution
Prolonged non-invasive blood pressure measurements in Auto mode may be associated with purport, ischemia and neuropathy in the limb wearing the cuff. When monitoring a patient, examine the extremities of the limb frequently for normal color, warmth and sensitivity. If any abnormality is observed, stop the blood pressure measurements.
- You must not perform NIBP measurements on patients with sickle-cell disease or under any condition which the skin is damaged or expected to be damaged.
- For a thrombasthenia patient, it is important to determine whether measurement of the blood pressure shall be done automatically. The determination should be based on clinical evaluation.
- Do not apply the cuff to a limb that has an intravenous infusion or catheter in place. This could cause tissue damage around the catheter when infusion is slowed or blocked during cuff inflation.
Tips and random notes
Reinstall software
Follow the steps below to remove the program prior to running the setup program again.
- Uninstall the ABPM50 program from 'Add & Remove Program,' which can be found in control panel. As an alternative, go to Start >> All Programs >> ABPM50 Monitor >> Uninstall ABPM50 Monitor to remove the program.
- Connect the device to the computer via the USB port.
- Right click on Computer, select Manager >> Device Manager.
- Look for CD Class example (under Other devices) or STM32 Virtual COM port Device (under Ports). If found, double click on the entry and select Driver tab and Uninstall.
Run the ABPM50_Setup. A version of the program can be found in the download section above.
Install driver (Manual)
If the installed software cannot find the ABPM50, the device driver may not be installed properly. To check for this possibility, plug in the ABPM50 in the computer USB port and make sure that it is turned on. Right click on 'Computer' and select 'Manage' > 'Device Manager'. If 'STM32 Virtual COM port Device (COMx)' appears (see left diagram below) , the device driver is installed properly; if 'CD Class example' appears (see right diagram below), Windows finds the device but not the driver; if no extra entry is found, Windows cannot find the device.
In the third case, there is a problem with the USB connection. Try a different USB cable and/or USB port. Get another USB device to verify that the USB cable and USB port work.
In the second case, follow the following steps to reinstall the driver.
- Download a new driver and save it to your hard disk.
- Run the exe file and extract the folder 'abpm50' to a temporary location. The folder contains two INF files, one is for 32-bit Windows and the other is for 64-bit Windows.
- In device manager, double click 'CD Class example'.
- Click the Driver tab, click Update Driver and follow the instructions.
- When Windows asks for the driver location, set it to the folder 'abpm50' in the temporary location.
- Continue until the installation finishes.
- Restart the PC.
Software conflicts
The programs running on your PC are interfering with each other in accessing the COM port. One fix is to remove the offending program; however this works only if you know this is the problem and the trick is to find out the offending programs. I am not aware of any easy way to determine the conflict. There are a few things you can do to look for hints.
- Communication error messages (e.g. 'Read COM failed') when running a program. This program is a partner involved in the conflict.
- Error messages during system or program startup. The program generating the error message is another potential candidate.
- Install the software on another PC (preferably a clean PC without installed programs that uses the USB port).
For one particular case, on a computer we used for testing various devices, we finally decided to reinstall Windows to solve the problem.
Possible fixes for resolving software conflicts are:
- Uninstall the offending program.
- Reinstall Windows
- Multi-boot: By installing multiple operating systems on the same computer, you can built a 'clean' one and run the software on this copy. The drawback is you would require extra disk space and at least two disk partitions, one for each copy.
- Virtual machine: See Microsoft Windows virtual PC, VMware virtual machine and Windows XP virtual machine. Each virtual machine would run within its own environment and would eliminate any interference. When building a virtual machine, do not copy from one that contains the conflicting software.
The application does not use a lot of resources. Any old computer running WXP would work. If you encounter any software conflict, just re-install Windows to get a clean machine.
You should try to install the software on another computer first to verify the problem before trying multi-boot or virtual machine. These two approaches, though not difficult, require some expertise in installing Windows. There are many other advantages in running multiple instances of Windows on one computer, which has saved us many times in the past.
Cuff sizes
The width of the cuff should be either 40% of the limb circumference (50% for neonates) or 2/3 of the upper arm length. The inflatable part of the cuff should be long enough to encircle 50-80%of the limb. The wrong size of cuff can cause erroneous readings. If the cuff size is in question, then use a larger cuff.
Make sure that the cuff edge falls within the range of mark <->. If it does not, use a larger or smaller cuff that fits better.
| Patient | Limb Perimeter | Cuff Width |
|---|---|---|
| Infant | 10-19 cm | 8 cm |
| Child | 18-26 cm | 10.6 cm |
| Adult1 | 25-35 cm | 14 cm |
| Adult2 | 33 - 47 cm | 17 cm |
| Thigh | 46-66 cm | 21 cm |
Driver Contec 8000
ABPM CPT procedure codes
CPT code 93784 thru 93790 may be used for billing purposes, including:
| Description | CPT |
|---|---|
| Ambulatory blood pressure monitoring; including recording, scanning analysis, interpretation and report. | 93784 |
| Recording only | 93786 |
| Scanning analysis with report | 93788 |
| Physician review with interpretation and report | 93790 |
ABPM related IDC-9 codes
| Condition | IDC-9 |
|---|---|
| Elevated blood pressure reading without diagnosis of hypertension (The only ICD-9 code covered by Medicare) | 796.2 |
| Essential hypertension | 401 |
| Essential hypertension - Unspecified (Resistant) | 401.9 |
| Hypertensive heart disease | 402 |
| Hypertensive renal disease | 403 |
| Nocturnal angina | 413.0 |
| Ill-defined descriptions and complications of heart disease | 429 |
| Orthostatic hypotension | 458 |
| Hypotension, unspecified | 458.9 |
| Hypertension complicating pregnancy, childbirth, and the puerperium | 642 |
| Transient hypertension of pregnancy | 642.2 |
| Mild or unspecified pre-eclampsia | 642.4 |
| Unspecified hypertension complicating pregnancy | 642.9 |
| Maternal hypotension syndrome | 669.2 |
| Syncope and collapse | 780.2 |
| Other Hypertension (Episodic, Labile, Postural) | 997.91 |
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Medicare has approved the use of ABPM under certain medical situations.
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Useful information on ambulatory blood pressure monitor
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- Ambulatory blood pressure monitoring, Barry P McGrath, and on behalf of the National Blood Pressure Advisory Committee of the National Heart Foundation of Australia, The Medical Journal of Australia
- Ambulatory blood pressure, Wikipedia
- Clinical applications of ambulatory blood pressure monitor, Michael E. Ernst, PharMD, BCPS, George R. Bergus, MD, Medscape Today