US2014142416A1PendingUtilityA1
System and method for diagnosing a fluid status of a patient
Est. expiryMay 18, 2025(expired)· nominal 20-yr term from priority
Inventors:Alejandro Ortiz-Burgos
A61B 5/412A61B 5/021A61B 5/029A61B 5/4878A61B 5/02028A61B 5/369A61B 6/03A61B 5/055A61B 5/7282A61B 5/7225A61B 8/04A61B 5/0044A61B 6/503A61B 5/7278A61B 5/0263A61B 8/065A61B 5/7246
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Claims
Abstract
A system and method for diagnosing a fluid status of a patient includes non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient. The left ventricular pressure is compared to a predefined pressure value to diagnose the fluid status.
Claims
exact text as granted — not AI-modified1 . A method of diagnosing a fluid status of a patient, the method comprising:
non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient by non-invasively measuring a plurality of cardiac parameters of the patient, including a stroke volume of the left ventricle, a mitral valve area, and a left ventricular diastolic filling time; and comparing the left ventricular pressure to a predefined pressure value to diagnose the fluid status.
2 - 5 . (canceled)
6 . The method according to claim 1 , wherein the cardiac parameters are measured using one of an echocardiogram apparatus, a magnetic resonance imaging (MRI) apparatus, and a computer aided tomography (CAT) apparatus.
7 . A method of diagnosing a fluid status of a patient, the method comprising:
non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient by non-invasively measuring a plurality of cardiac parameters of the patient, including a stroke volume of the left ventricle, a mitral valve area, and a left ventricular diastolic filling time; calculating a left ventricular end-diastolic pressure using a formula:
L
V
E
D
P
=
36
ρ
(
S
V
A
mitral
(
Δ
t
D
)
)
2
,
where LVEDP is the left ventricular end-diastolic pressure, ρ is a density of blood; SV is the stroke volume, A mitral is the mitral valve area, and Δt D is the left ventricular diastolic filling time; and
comparing the left ventricular pressure to a predefined pressure value to diagnose the fluid status.
8 . A method of diagnosing a fluid status of a patient, the method comprising:
non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient by non-invasively measuring a plurality of cardiac parameters of the patient, including a stroke volume of the left ventricle, a mitral valve area, a maximum velocity of blood entering the left ventricle, and a left ventricular diastolic filling time; calculating a left ventricular end-diastolic pressure using a formula:
L
V
E
D
P
=
3
πρ
(
S
V
)
v
max
A
mitral
Δ
t
D
,
where LVEDP is the left ventricular end-diastolic pressure, ρ is a density of blood; SV is the stroke volume, v max is the maximum velocity of blood, A mitral is the mitral valve area, and Δt D is the left ventricular diastolic filling time; and
comparing the left ventricular pressure to a predefined pressure value to diagnose the fluid status.
9 . A method of diagnosing a fluid status of a patient, the method comprising:
non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient by non-invasively measuring a plurality of cardiac parameters, including a volume of the left ventricle, a velocity of blood entering the left ventricle, and a mitral valve area; monitoring a change in velocity of the blood entering the left ventricle over time; calculating the left ventricular pressure using a formula:
L
V
P
=
ρ
V
A
mitral
v
t
+
ρ
v
2
,
where LVP is the left ventricular pressure, ρ is a density of blood; V is the volume of the left ventricle, A mitral is the mitral valve area, v is the velocity of blood entering the left ventricle, and
v
t
is the change in velocity over time; and
comparing the left ventricular pressure to a predefined pressure value to diagnose the fluid status.
10 - 17 . (canceled)Join the waitlist — get patent alerts
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