Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3....

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Mechanical Ventilation PV Curves

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Transcript of Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3....

Page 1: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Mechanical Ventilation PV

Curves

Page 2: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Techniques for Measurement

1. Supersyringe

2. Constant Flow

3. Multiple Occlusion

Page 3: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Low Constant Flow

• Simple• Can be performed on ventilator (some types)• Avoids disconnect• Hysteresis • Heavy sedation or paralysis required• Flow 9 L/min for “quasi-static” conditions1

1Qin Lu, AJRCCM 1999;159:275-282Servillo, AJRCCM 1997;155:1629-1636

Page 4: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Radford, Tissue Elasticity, 1957

Surface forces due to air-liquidinterface

Page 5: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Gattinoni, ARRD 1987;136:730-736

Pflex

Page 6: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

P

"safe"window

zone of overdistension

V

Pressure-Volume Curve

LIP

UIPzone of derecruitment and atelectasis

Page 7: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

PV CurveNormal ARDS COPD

Page 8: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

PV Curve

Normal

Page 9: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

PV Curve

ARDS

Page 10: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

P

"safe"window

zone of overdistension

V

atelectrauma

volutrauma

Lung Protective Ventilator Strategies

LIP

UIPzone of derecruitment and atelectasis

DON’T EVEN

THINKOF PARKING

HERE

Page 11: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Pressure

Vo

lum

e

Safe

zon

e

Overdistention

Derecruited

Lower Pflex, LIP

Upper Pflex, UIP

PV Curve in ARDS

Page 12: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

Preventing Overdistention and Under-Recruitment

Injury“Lung Protective” Ventilation“Lung Protective” Ventilation

VOLUME

VOLUME

PressurePressure

Limit Distending PressureLimit Distending Pressure

Add PEEPAdd PEEP

Limit VT

Page 13: Mechanical Ventilation PV Curves. Techniques for Measurement 1. Supersyringe 2. Constant Flow 3. Multiple Occlusion.

PV Curve

COPD


Occlusion (Orthodontics)

Occlusion (Orthodontics)

Development of Occlusion - Semmelweis Egyetem · Development of teeth • Mandibular central incisors: –8-th month ... – Postnormal occlusion (distal occlusion or Class II occlusion)

Development of Occlusion - Semmelweis Egyetem · Development of teeth • Mandibular central incisors: –8-th month ... – Postnormal occlusion (distal occlusion or Class II occlusion)

Occlusion presentation

Occlusion presentation

Articulating and Occlusion Test Materials€¦ · Articulating and Occlusion Test Materials...we make Occlusion visible ... Functional occlusion is important for the overall health

Articulating and Occlusion Test Materials€¦ · Articulating and Occlusion Test Materials...we make Occlusion visible ... Functional occlusion is important for the overall health

Implant occlusion

Implant occlusion

Occlusion Mcq

Occlusion Mcq

Occlusion. Factors of occlusion. The clinical significance of restoring individual occlusion, tools and steps to achieve it.

Occlusion. Factors of occlusion. The clinical significance of restoring individual occlusion, tools and steps to achieve it.

Occlusion basic

Occlusion basic

Mechanical Ventilation PV Curves

Mechanical Ventilation PV Curves

Balanced Occlusion

Balanced Occlusion

Retinal occlusion

Retinal occlusion

Ventilation Technical Data VAM-FC...3 2 • Ventilation • VAM-FC 5 • Indoor Unit • VAM-FC 2 Specifications Notes (1) Measured on fan curve 15. Refer to fan curves. (2) Measured

Ventilation Technical Data VAM-FC...3 2 • Ventilation • VAM-FC 5 • Indoor Unit • VAM-FC 2 Specifications Notes (1) Measured on fan curve 15. Refer to fan curves. (2) Measured

Ambient Occlusion

Ambient Occlusion

Objections to the NCM Occlusion The Process of Occlusionu0028395/classes/5210/lecture_notes/occlusion... · The Process of Occlusion Jim Steenburgh ... Objections to the NCM Occlusion

Objections to the NCM Occlusion The Process of Occlusionu0028395/classes/5210/lecture_notes/occlusion... · The Process of Occlusion Jim Steenburgh ... Objections to the NCM Occlusion

Dental Occlusion

Dental Occlusion

Traumatic occlusion

Traumatic occlusion

Functional Occlusion

Functional Occlusion

Occlusion ppt

Occlusion ppt

Chapter 1raman/Publications_files/Arora.DVSN.Chap.… · Matching curves across widely varying viewpoint requires local image fea-tures that are invariant to changes in pose, occlusion,

Chapter 1raman/Publications_files/Arora.DVSN.Chap.… · Matching curves across widely varying viewpoint requires local image fea-tures that are invariant to changes in pose, occlusion,

OCCLUSION DENTAIRE

OCCLUSION DENTAIRE