cvp monitoring

CVP MONITORING
Submitted by:
Shreeya Sreekumar
Bsc(N) II year,
CCON
Presented under:
Ms. Archana Netke
Asst.Lecturer, MSN,
CCON

Contents:
1. Introduction
2. Definition
3. Factors affecting CVP
4. What is CVP monitoring?
5. Purposes for CVP monitoring
6. Methods to measure CVP
7. What is CVC?
8. Types of CVC
9. Routes of access
10. Indications
11. Contraindications
12. Nursing assessment
13. Procedure
14. Nurse’s Responsibilities
15. Complication
16. Summary
17. Bibliography

INTRODUCTION
◦Blood from the systemic veins flows into
RA. The pressure in RA is CVP. Thus, a
catheter is passed via Subclavian
vein/Jugular vein into superior venacava
to determine venous return &
Intravascular volume of RA.

DEFINITION
What is CVP?
Central venous pressure (CVP) is the pressure of
blood in the thoracic vena cava at the point where
the superior vena cava meets the inferior vena cava
prior to entry into the right atrium (RA) of the heart.
-Encyclopedia of Intensive care Medicine

◦CVP reflects amount of blood returning to
heart & the ability of heart to pump blood
into arterial system.
◦Normal CVP in an awake, spontaneously
breathing pt is : 5-10 cm H2O / 1-7 mmHg
CVP ~ RAP

◦Right side function of heart is assessed through
evaluation of CVP whereas left side function of
heart is less accurately reflected by evaluation of
CVP,but it may be useful in chronic R&L Heart
Failure/ for differentiating R&L Ventricular
Infarctions

Factors affecting CVP
Factors ↑sing CVP:
1. Hypervolemia
2. Cardiac tamponade
3. Tension pneumothorax
4. Heart failure
5. Pleural effusion
6. Forced exhalation(Raised intrathoracic exp by cough)
7. Pulmonary embolism
8. Pulmonary Hypertension
9. Mechanical Ventilation

10. ↓sing C.O.
11. Cardiac competence (reduced ventricular function)
12. Blood volume( ↑sed venous return)
13. Intra-aortic & Intra-peritoneal pressure
14. System Vascular Resistance
15. Application of +ve End Expiratory Pressure (PEEP)
Factors ↓sing CVP:
1. Hypovolemia
2. Deep inhalation ( reduced intrathoracic pressure)
3. Septic shock( venodilation)

What is CVP monitoring?
◦It is an invasive procedure where threading of CVC
inserted into a large central vein (Subclavian,
Internal/external Jugular,Median
basilin/Femoral).The catheter’s tip positioned into
RA,upper portion of superior venacava/inferior
venacava (femoral approach).
◦The Physician inserts a catheter through a vein &
advances it until its tip lies/near the RA.
◦As no major valves lies @ junction of Venacava &
RA,pressure @ end diastole reflects back to catheter.

◦When connected to manometer,the catheter
measures CVP → an Index of RVentricular function.
◦CVP monitoring helps to :
→a) Assess cardiac function
→b) To evaluate venous return to heart
→c) to indirectly check how well the
heart is pumping.

◦The CV line also provides access to a large
vessel for rapid, high volume fluid
administration & allows frequent blood
withdrawal for lab sample.
◦Monitoring can be done intermittently or
continuously.Typically a single lumen CVP
line is used for intermittent pressure
readings.

Purposes for CVP monitoring
1. To serve as a guide for fluid replacement.
2. To monitor pressures in RA & central vein.
3. To administer blood products,TPN & drug therapy
contraindicated for peripheral infusion.
4. To obtain venous access when peripheral venous sites
are inadequate.
5. To insert a temporary pacemaker.
6. To obtain Central venous blood samples.

Methods to measure CVP
1) INDIRECT Assessment:
. By inspection of Jugular venous pulsations in the neck :
there is no valve b/w RA & Internal Jugular
vein,thus the degree of distension & venous waveform
reflects info. About cardiac function.

Contd…
2) Direct assessment:
a) Manual measurement – Here CVP is
measured using a pressure manometer & an
indwelling central venous catheter.
→Wards generally use manometers.
→Through this it is simple to measure CVP,but
unable to analyse waveform and there is a
relatively slow response of H2O due to
Intrathoracic pressure changes.

Contd…
b) Electronic Measurement – By using a
Calibrated transducer which is an automated
electronic pressure monitor. Pressure waveform
is displayed on paper / Oscilloscope.
→more accurate and direct observation of
waveform.
→Accident & emergency,ICU’s use transducers

What is CVC ?
◦ A CVC also known as CV line/Central line/Central
venous access catheter is a catheter placed into a large
vein.It is a form of venous access & is often needed in
critically ill patients/ for those requiring prolonged I/V
therapies
◦ CVC used to administer medication, administer
fluid/blood products for large volume resuscitation &
measure CVP & to aid in diagnosis of cardiac failure
◦ The catheter used are commonly 15-30 cm in
length,made of Silicon/Polyurethane & have
single/multiple lumens for infusion.

Types of CVC
1) Single lumen
2) Double lumen
3) Triple lumen

Contd…
4) Quadruple lumen
5) Quintuple lumen
6) PICC
(Peripherally Inserted
Central Catheters) –
Inserted through a vein in arm

Contd…
7) Hemodialysis Catheter
8)Introducer sheath
9) Implanted port
Hemodialysis Catheter

Routes of access
More commonly used veins
1. Subclavian vein
2. Internal Jugular vein (most
preferred because it’s
consistent,has predictable
anatomy,in alignment with
RA, palpable,high success
rate and no thoracic duct
injury)
3. Femoral vein
4. Basilic vein
Less commonly used veins
1. Axillary
2. External Jugular
3. Brachial
4. Cephalic
5. Brachiocephalic

Indications for CVC
1.Measurement of CVP
2.Drug administration to central circuln
3.Need for frequent I/V access due to pt’s poor
peripheral access
4.Parenteral nutrition
5.Long term medication
6.Dialysis
7.Access for PAC

Contraindications for CVC
1.Bleeding disorders
2.Anticoagulation therapy
3.Combative pt
4.Distorted local anatomy
5.Cellulitis,burns or severe dermatitis @ the site
6.Vasculitis

Nursing assessment of pt before CVP
monitoring:
1. Physical Examinn : General physique, height, weight,open
wounds etc
2. Vascular Assessment:
★ Anatomy of Peripheral & Central veins
★ H/o previous CVP Catheterization
★ Any evidence of venous thrombosis caused by
presence of CVC
★ Any sign of swelling, stenosis of veins in
thorax/abdomen/neck.

Contd…
3) Allergies
4) Respiratory Function assessment: CXR,CT chest
5) CVS assessment: Implanted pacemaker & defibrillators inorder to rule out
catheters that interfere with position of leads of these devices
6) Neurological assessment: L.O.C, effect of sedative & analgesic drugs
7) Check for Fractures in clavicle/UL bones
8) Lab assessment: Serum electrolyte ranges, level of serum K+( if incre. Risk
for arrhythmias)
9) Coaguln assessment: Platelet, Warfarin, Heparin counts to be noted.

Cvp Monitoring with Manometer
Articles Required:
A tray containing:
1. I/V tubing
2. Manometer set
3. A stopcock if not included in manometer set
4. Indelible ink marking pen
5. NS
6. Adhesive tape
7. Facemask
8. Sterile mask
9. Kidney tray & Paper bag

Stopcock
Manometer fitted on
IV stand

3 way Stopcock
Here upper port is connected to
Manometer,right side of port
connected to NS and left side of
port connected with CVC line

◦Phlebostatic
Axis
Before Measuring
CVP we need to
know what’s
Phlebostatic Axis.
Phlebostatic Axis
is used to identify
level of RA.

Procedure
STEPS RATIONALE
1) Explain procedure to pt and get his
informed consent
Will reduce anxiety of pt
2) Wash your hands & put on gloves Reduces transmission of microorganisms
3) Gather needed articles @ bedside Maximizes efficiency & minimize chances of
breaking sterility once started
4) Position pt in supine/ flat position with
no pillows under head
(If pt is an old pt and can’t tolerate this
position,choose semi-fowlers)
5) Mark the level of RA [@ the midaxillary
line about ⅓rd of the distance from anterior
to posterior chestwall] in the 4th intercostal
space with an ‘X’ mark using an indelible
ink pen
Phlebostatic axis used to identify level of RA

6) Fix the manometer on an I/V pole such
that it is zeroed @ ‘X’ mark
Helps minimize variance in measurement
7) Connect I/V fluid (usually NS) to a 3-way
stopcock & flush other ports
Forces air out of stopcock and fluids like
glucose are not used because they stick to
manometer.
8) Put mask & sterile gloves Aseptic technique minimize chances of
infection
9) Connect CVP manometer to upper port of
stopcock
10) Connect CVP tubing from pt to 2nd side
port of stopcock
Thus establishing I/V line from NS to CVP
catheter
11) Turn stopcock off to pt & fill manometer
with NS to the 20 cm mark above anticipated
reading
The normal CVP reading varies from 8-12
cm of H2O
12) Hold manometer @ the phlebostatic axis
& turn the stopcock off to the NS
System is now open from manometer to pt

13) Watch as the fluid falls in the
manometer,take CVP reading when
fluid stabilizes
The fluid will stabilize @ a level equal
to the pressure in RA.
(if fluid level fluctuate with the pt’s
respiration,take the reading @ the
end of pt’s expiration)
14) Turn the stopcock off to the
manometer
Re-establishes fluid from I/V
15) Reposition pt
16) Keep manometer in an upright
position ( hanging from I/V pole) to
prevent air bubbles entering fluid
column
To prevent air bubbles entering fluid
column
17) Wash & dry hands Prevents spread of microorganisms
18) Document readings obtained in
pt’s medical record & Nurse’s record
Provides continuity of care

Cvp monitoring with transducer
Steps:
1) Explain the procedure to pt &
get informed consent. The CVC is attached
to I/V fluid within a pressure bag with the
pressure bag inflated up to 300 mmHg .
Place the pt in supine position if possible.
2) Catheters differ but white
or proximal lumen suitable for CVP
3) Tape the transducer to the
phlebostatic axis.

4) Turn the tap off to the pt &
open to the air by removing the cap
from the 3 way port,thus opening
the system to air
5) Press the 'zero’ button on the monitor
& wait while calibration occurs

6) When ‘zeroed’ is displayed on the monitor,
replace the cap on the 3-way port & turn the
tap on to the pt
7) Observe the CVP trace on the monitor.
The waveforms undulates as the RA contracts &
Relaxes, emptying and filling with blood.

Nurse’s Responsibilities:
1.Monitor for signs of complications
2.Assess for patency of CVP line
3.The dressing on the central venous site should be changed
using Aseptic techniques and a transparent dressing to be
done to observe for any redness/discharge
4.The length of the indwelling catheter should be regularly
recorded & monitored.
5.Check for any infections like CLABSI

Complications
1.Haemorrhage
2.Catheter Occlusion
3.Infection
4.Air embolus
5.Catheter displacement

Summary
◦CVP is an estimate of BP in RA.CVP is very
useful for monitoring effect of fluid therapy in
critically ill patients & CVP measurement is
indicated when trying to determine fluid
resuscitation end points.CVP is a better
indicator of Intravascular Volume status.

BIBLIOGRAPHY
1. The Lippincott,Manual of Nursing Practice,7th edition,Page no: 320 -323
Websites:
1) https://www.slideshare.net/mobile/kharabish/cvp-44162733
2) https://wwww.slideshare.net/mobile/SubrataKumar/cvp-monitoringdr-subrata-
kumarbsmmu2014
3) https://www.anaesthesia.hku.hk/LearNet/measure.htm#d3
4) https://en.m.wikipedia.org/wiki/Central_venous_catheter
5) https://anesth.unboundmedicine.com/anesthesia/view/ClinicalAnesthesiaProcedures/72818/
all/Central_Nervous_System__Level_of_Consciousness_Monitoring
6) https://www.nursingtimes.net/roles/practice-nurses/central-venous-lines-11-03-2003/
7) https://www.kemh.health.wa.gov.acc/~/media/Files/Hospitals/WNHS/For%20health%20profe
ssionals/Clinical%20guidelines/OG/WNHS.OG.CVPMeaurement.pdf
8) https://www.slideshare.net/mobile/HarshilJoshi1/central-venous-pressure-monitoring
9) https://www.slideshare.net/mobile/srinivas8990/1-monitoring-of-central-venous-pressure-its-
techniques-104404731
10) https://youtu.be/s7kc6DoIruA

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