This section contains the most Frequently Asked Questions
What type of training is required
to properly use the device, in order to obtain reliable and valid measurements
DiaTecne s.r.l. provides a tutorial
where is clearly shown the appropriate use of PulsePen in order to measure PWV. This tutorial was developed to show the previous non-wireless
model of PulsePen, however the method of applanation tonometry does not change in the current wireless model. Our suggestion is to begin to use
the PulsePen learning from the information provided by the tutorial that usually are enough combined with the steadiness and ability of the operator.
Sometimes, in case the operator has doubt about the pulse wave recording, a brief training may be useful (4-5 hours of intensive training).
On request DiaTecne s.r.l. provides a "spot" training: 5-6 hours in full immersion. For more than 3 purchased units DiaTecne provides a
free training (travel and stay charged to Customer). In any case if the Customer has specific questions/doubt using the device, can obviously
ask us by email and we will reply in a short time. It is also possible to export one or more examinations and to send us in order to obtain a
valued opinion about the signal quality from tonometry experts.
Do laboratory personnel assigned
to measure PWV using your device require a specific level of professional training or background? For example, carotid IMT requires a highly
skilled ultrasound technician.
A specific level of professional
training is not required for the use of the PulsePen. As far as we know, not only medical doctor, but also nurses, students, biologists and
engineers use the PulsePen device in all the world in daily clinical practice. Actually, when the operator uses the PulsePen he/she must know
what he/she want to find, i.e. he/she must know the pulse waveforms in different clinical conditions. In order to learn quickly the elements of
hemodynamics, we suggest to read the book “Pulse waves: how vascular hemodynamics affects blood pressure” (author: P. Salvi, published by Springer).
How long does the measurement process
require for each assessment?
An expert operator may assess PWV in
5-8 minutes (included the insertion of patient’s data in the computer). During epidemiological studies a single operator assessed up to 186 PWV a
day (El Meniaa Study in Algeria). In our experience it is not difficult to became a skilled operator after 20-30 PWV measurements.
What posture is the participant in
during the measurement?
PulsePen measures not only PWV, but
also central and peripheral blood pressure, thus the patient needs to stay lying down.
Is there any discomfort?
No discomfort for the patient.
What is the reliability of the measurement?
PulsePen has been validated versus
invasive method (P. Salvi, et al. Validation of a new non-invasive portable tonometer for determining arterial pressure wave and pulse wave
velocity: the PulsePen device. J Hypertens. 2004; 22:2285-2293) and versus MRI (L. Joly, et al. Pulse wave velocity assessment by external
noninvasive devices and phase-contrast magnetic resonance imaging in the obese. Hypertension. 2009; 54:421-426). PulsePen was widely used in
epidemiological and clinical studies. Actually the normal values of PWV in children and adolescents currently used in all the world were acquired
with the PulsePen device (G. Reusz, et al. Reference values of pulse wave velocity in healthy children and teenagers. Hypertension.
2010; 56:217-224). Also reference values of PWV in the elderly age were acquired with the PulsePen device (A. Cosmin, et al. Reference values of
aortic pulse wave velocity in the elderly. J Hypertens. 2008; 26:2207-2212.). Because of the proliferation of methods for measurement of aortic
PWV, the international scientific society ARTERY published in 2010 guidelines for the validation of the instruments used for this purpose
(Wilkinson IB, et al. on behalf of the ARTERY Society. Artery society guidelines for validation of non-invasive hemodynamic measurement devices:
Part 1, arterial pulse wave velocity. Artery Research. 2010;4:34-40). Below is the conclusive judgment of these guidelines.
The PulsePen is the only device on the market, at the moment, that fully
satisfies all the requirements suggested by ARTERY: sampling rate of 1 kHz; registration of 10 cardiac cycles (other devices record 10 seconds); use of arterial
tonometer (some other devices use mechanotransducers), transit time determined from the waveforms using an intersecting tangent algorithm
(other devices use other algorithms). Registration up to 24 hrs in ASCII format of tonometric signals.
Can you provide research references
in which measurements taken with your device are related to other preclinical CVD markers or are used to predict CVD outcomes?
Pls see “Support / Articles”
What age ranges are appropriate for this measurements?
No limit of age exists for the use
of PulsePen tonometer. PulsePen has been widely used in children (as highlighted above, the normal values of PWV in children and adolescents
currently used in all the world were acquired with the PulsePen device) and in the elderly (as highlighted above, reference values of PWV in
the elderly were acquired with the PulsePen device). The longitudinal multicenter “PARTAGE” study included prospectively 1130 elderly subjects aged
older than 80 years living in nursing homes.
What sort of maintenance or service
is required for the device? What is the number of measurements before service is required?
No particular periodic maintenance
or calibration operations are necessary on the instrument. In the case of prolonged non-use, remove the batteries. To clean the equipment,
use a clean, dry cloth. Before each use with a new patient, it is necessary to clean the metal disk of the PulsePen probe and the plugs of the
Patient cable using a clean cloth dampened with alcohol. In the case normal cautions are applied during the instrument’s use (like avoiding that
the probe falls down, correctly inserting the battery, … and all precautions listed in the user manual), thousands of measurements are possible
with no service required.
How is service for the device handled?
In case of problems with the device
the Customer needs to contact DiaTecne s.r.l. by email and if necessary to send the apparatus following our instructions, using international
express couriers (DHL, UPS, FedEx, ..). In few days the device will be repaired and sent back to the Customer.
How is training handled?
Pls see point 1
How much does the device cost?
Are there discounts for research uses (as opposed to clinical uses in revenue generating health care settings)? Are there discounts for purchasing multiple units?
Pls ask a quote. At the moment the
main PulsePen device’s field of application is the research and our Customers are mainly Research Centers and Universities. Discounts are
applied in the case of multiple purchasing units. Pls ask a special quote for the number of the involved units.
Are there costs for service?
Only the shipping costs during the Guarantee period (2 years) are applied. After this period the cost depends on the damaged parts.
Normally in case of minor repair service only the shipping costs are applied