FL x{ |[9jnIX-Z"Y^dys%'V8NIJ(N)C}@iGg~yLByX"w$vQ"s9;};Ol)&3uQ&>1_q~/5wH9'^pmY7ZpI>Gq:GwG=3#X>gb1s0~4TzdH@?'ld4tLMjY]b\dUfV+J3aji6 ef%x-&L[Lcs=b@Ws,4Bt0CfJ~fdBSL,{K^{) mxI|E4j Normal ventilation leads to high (or normal) CO2 in the arterial blood and body cells. Make a few days of rest after the practice runs, and take the test afterward. This is critical when it comes to learning the information. For example, patients commonly use a flow rate of 2 liters per minute, but the flow rate varies by each patient's needs. The oxygen consumption is the amount of oxygen that is used up by the organism's body over time. Turbine technology in the device makes a constant high pressure air source unnecessary enabling mobility. We must consider that the income increase rate is more than the expenditure increase rate. For instance, if a persons spending increases 90% more for each new dollar of earnings, it would be expressed as 0.9/1 = 0.9. VO2 max = maximum milliliters of oxygen consumed in 1 minute / body weight in kilograms. If you want to check your heart muscle's oxygen consumption, we've got a tool for that the rate pressure product calculator. Flow trigger setting > 1 l/min:2*Flow trigger (max. Oxygen tank duration calculation approximates how much time is left in an oxygen tank based on oxygen flow settings. I cant imagine there is a simple formula to use because it depends on so many variables. Your VO2 at this stage of maximal exertion is called your maximal oxygen consumption ( VO2max ). These cookies ensure basic functionalities and security features of the website, anonymously. female patient with normal lungs has a tidal volume of 480 mL and is breathing at a rate of 12 breaths/min. For these reasons, COVID -19 treatment health - care facilities should be equipped with pulse oximeters, functioning oxygen systems single-use oxygenincluding 30.0 mL/cm H2O. a0c125a8-cf0d-46f8-98b0-ec2163c29f4c_website_en_US. /Pages 2 0 R Ventilation: Exchange of air between the lungs and the air (ambient or delivered by a ventilator), in other words, it is the process of moving air in and out of the lungs. "VE" stands for the volume of air expired in mL/min, "VI" represents the volume of air inspired in mL/min, "FeCO2" stands for the fraction of CO2 in expired air and "FiCO2" stands for the fraction of CO2 in inspired air. Pulmonary oxygen uptake (VO 2), or oxygen consumption, can be measured via a Douglas bag, by mass spectrometry, spirometry, or metabolic monitors (indirect calorimetry).16 Table 14.2 depicts VO 2 measurements obtained in different patient populations and under different clinical conditions. Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data. The units of rate calculated in this way are s -1. reaction rate, in chemistry, the speed at which a chemical reaction proceeds. 6 0 obj hi..i don't know if this is the right and appropiate place to ask this, but as far as i know anesthesiologist must learn about this at least some time in their education about this quick and dirty method - PSI/3 = # of liters left, then figure out how many minutes you have by dividing by the # of liters/min. This includes learning the formulas and calculations that are provided here in this guide. |(+Hm3#,mG You are using an out of date browser. Then, enter this data into the calculator. The adolescent protagonists of the sequence, Enrique and Rosa, are Arturos son and , The payout that goes with the Nobel Prize is worth $1.2 million, and its often split two or three ways. Each rise and fall counts as one breath. The easiest, fastest, and nicest of all the ways. As you can see, each question comes with a detailed rationale that explains exactly why the answer is correct. 51. Moreover, it is a good predictor of your potential as an endurance athlete or even an indicator of future health. What is the I:E ratio for a ventilator that is set to deliver a tidal volume of 850 mL at a frequency of 15/min with a flow rate of 45 L/min?1:2.5, 48. Oxygen Calculation Tool makes it easy to add and delete up to 10 cylinders for both the portable and onboard supply. 17-19 This test is based on stepping up 16.25 inches (0.41 m) from ground level. He also shares personal stories and insights from his own journey as a scientist and researcher. Check out 9 similar performance calculators . All images are used for illustrative purposes only and may not accurately represent the product or its use. That means you should know the formulas for both. In the article on this page, we prepared some brief information about what VO2 max is, how to calculate VO2 max, a description of VO2 max tests, and an explanation of how to use this aerobic capacity calculator. Here you can see a calculation of the estimated oxygen requirement for a HAMILTON-C1 ventilator based on the following parameters: O2 consumption (in l/min):(8.0 l/min + 3.0 l/min + 1.0 l/min) * (60.0 20.9) / 79.1 = 5.93 l/min, Total oxygen requirement (in liters) for 120 minutes:5.93 l/min * 120 = 711.6 liters. Inspired O2 (PiO2) PiO2 = FiO2 x (barometric pressure - saturated vapour pressure of H20) PiO2 = 0.21 x (760 - 47) - sea level. How do you calculate respiration rate from a graph? >> Particularly in low- and middle-income countries (LMICs), where supplies are likely to be inadequate in the face of the pandemic, boosting access to medical oxygen can save lives. endobj What is normal carbon dioxide production?200 mL/min, 9. Navigator Platform, Quantum Computer Helium Laboratory Oxygen Monitor, Oxygen Deficiency Sensor in Linear Accelerator Tunnel, O2N2 Oxygen Analyzer for On-Board Inert Gas Generation System (OBIGGS) validation, Amount of Spill (liters of LN2 or Kg of CO2). (must have javascript enabled). To determine your VO2 max if your resting heart rate is 60 bpm and you're 30 years old: Calculate your maximum heart rate by multiplying your age by 0.7 and deducting it from 208, which equals 187 bpm. Born and raised in the city of London, Alexander Johnson studied biology and chemistry in college and went on to earn a PhD in biochemistry. To calculate the energy expenditure of a 62 kg woman cycling at a work rate of 450 kgm.min. a Breathing rate Step 1: Count the number of breaths taken per minute on the time trace. e.g. /Rotate 0 However, the results should be pretty similar, without a big difference. You also have the option to opt-out of these cookies. Range: 2 to 30 l/min, Flow trigger setting 1 l/min:2 l/min Put your result time into the calculator and read out your VO2 max value. When to Use. Chang, David. Pulse dose delivery was originally designed to allow for smaller machines and longer battery life. 2 0 obj How do you calculate maximum oxygen consumption? As a result, O2 transport is normal and they have normal oxygen values in the brain, heart, and other body organs and cells. .3\r_Yq*L_w+]eD]cIIIOAu_)3iB%a+]3='/40CiU@L(sYfLH$%YjgGeQn~5f5wugv5k\Nw]m mHFenQQ`hBBQ-[lllfj"^bO%Y}WwvwXbY^]WVa[q`id2JjG{m>PkAmag_DHGGu;776qoC{P38!9-?|gK9w~B:Wt>^rUg9];}}_~imp}]/}.{^=}^?z8hc' g)}p1p-mXa8QZF76\]gaO3(.m|:2]G%\Uc}`!> $Ef('Efh$36zA'.bE9ba!n\ bG _5kkAY:VxFoJYD\^%)v btNklDMKC ]f]i.5oFIKiVVOkr+I^q7GY#NDRWW2:/U/]3zZoI+Z,t,,p@Z (F^ZI'uV`iXNP 1_hL>L-&~RuNVvdF|IS>P7{$p{@ko Zc~q1vz|W5'`. /Last 8 0 R Mechanical ventilation likely benefits such patients by reducing O 2 demands of respiratory muscles and making additional O 2 available to other vital tissues. You might also be interested in our race time improvement calculator. Input the pulse into the aerobic capacity calculator and select your sex. %PDF-1.4 However, as previously mentioned, all you have to do is learn and memorize the formulas. << /Annots [] hello, thx for the info guysi get what you both meanbut, i am very sorry..but i am actually asking something different Well that is much more complicated because the ventilators use the O2 to drive the ventilator. 39. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. How do you calculate ventilation in liters per minute? Pass the TMC Exam with insider tips, tricks, and exam hacks. Patients who are on long-term ventilation may require a feeding tube directly inserted into the nose or mouth, or through a hole made in the stomach. The free calculator & app is ideal for technicians, therapists, patients and caregivers to easily calculate the approximate available oxygen remaining in an oxygen cylinder, based on the patients device and cylinders size & contents. Her smoking history would be recorded as:45 pack years, 53. How do you calculate oxygen delivery to the tissues? What is the formula for deadspace/tidal volume ratio?VD/VT = (PaCO2 PeCO2) / PaCO2, 11. These methods are based on the following: Each of the methods is explained in detail in the section below. 2. 660 L of o2 in a full tank at 2200 psi, so 660/2200 = x/psi showing. PEEP has little effect on oxygen consumption. A detailed case study is outlined here. 1. a peak or plateau in oxygen uptake with continued increases in workload. Copyright 2022 ASAFINTECH, Asociacin Salvadorea de Tecnologa Financiera. << PiO2 to Alveoli. << Resting heart rate value. In fact, the oxygen cost of horizontal . 4th ed., rtexam, 2018. /Type /Catalog What is the PO2 in dry air at a barometric pressure of 760 mmHg?760 x 0.21 = 159.6, 24. /MediaBox [0.0 0.0 595.0 842.0] But opting out of some of these cookies may affect your browsing experience. 5. The amount of reactant lost or product gained can be measured by recording the mass in grams (for solids) or the volume in cm 3 (for liquids). [email protected] % If you have the correct formula, you can easily calculate the correct answer simply by plugging the numbers in. An H cylinder is half full (full = 2,200), and the patient is receiving oxygen via nasal cannula at 3 L/min. sex = male, age = 32 years, weight = 78 kg. Version 9.0 jU'N@P%FuiS,]pR(g-QZlPF SaO2 - hemoglobin saturation in oxygen as a percentage with normal . In order to work out the total amount of oxygen required under these changed circumstances, it is necessary to know how to calculate the oxygen consumption for a particular ventilator. Es la nube de AWS el lugar adecuado para una Fintech? What is the PO2 of humidified tracheal air? It is the product of total blood flow or cardiac output (CO) and the oxygen content of arterial blood and is usually expressed in ml O 2 /min. You can also choose a few of them and compare the results. Our initial runs to assess E cylinder oxygen consumption of various types of ventilators demonstrate that fluidic and turbine style ventilators consume more oxygen than compressor style ventilators. /Resources 12 0 R After many, many years, you will have some intuition for the physics you studied. Voila! Results: The ventilator algorithm and the manual calculation underestimated the actual cylinder duration by 12 +/- 3% with each test. IntelliSync+: variable In order to better solve the phenomenon of low oxygen in the corner of return airway caused by abnormal gas emission in goaf during shallow coal seam mining, by analyzing the source and reason of low oxygen phenomenon, a prediction model of oxygen concentration in the corner of return airway based on genetic algorithm (GA) and random forest (RF) technology was proposed. Yes! MITs Alan , In 2020, as a response to the disruption caused by COVID-19, the College Board modified the AP exams so they were shorter, administered online, covered less material, and had a different format than previous tests. you could disconnect your macine from the wall for 15 minutes, run it off the cylinder in back and calculate the amount of consumption based off the aforementioned loss of pressure calculations. However, I do have some good news as well. Please note: The oxygen concentrator's pulse-flow . La cuarentena potencia los crditos online. /Kids [6 0 R 7 0 R] The . It is a popular indicator of physical efficiency (especially aerobic efficiency). All information these cookies collect is aggregated and therefore anonymous. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. The 3 Month (100 Day) MCAT Study Schedule Guide: 2022 Edition, http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2564216/. Not all features are available in all markets. /Dest /__WKANCHOR_2 Field anesthesia machine ventilators powered by compressed gas are designed for remote locations that may lack a pipeline supply of O 2.This study determined the O 2 consumption of the compPAC ventilator powered by E cylinders when ventilating the Vent Aid Training Test Lung model of high (HC) and low (LC) pulmonary compliance. It is the maximum volume of oxygen that your body is capable of consuming and converting to energy for your working muscles. min 1) for patients administered low-flow anaesthesia using the formula: (inspired O 2 fractionend-tidal O 2 fraction) minute ventilation 1, but we suggest that the alveolar minute ventilation, not the total minute ventilation . How do you calculate cellular respiration? endobj /CropBox [0.0 0.0 595.0 842.0] Pass the TMC Exam using practice questions, quizzes, and real-life practice exams. What does the deadspace-to-tidal volume ratio measure?It measures the percentage of the tidal volume that is dead space which does not participate ingas exchange. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. By clicking Accept, you consent to the use of ALL the cookies. What is the formula for stroke index?SI = Stroke Volume / BSA, 37. Oxygen Calculator Step 1. /Rotate 0 After obtaining a patients PFT results, they have a VC of 3.4, FRC of 5.8, and an ERV of 1.2. xwTS7" %z ;HQIP&vDF)VdTG"cEb PQDEk 5Yg} PtX4X\XffGD=H.d,P&s"7C$ Measuring Absolute VCO2. Flow trigger setting > 2 l/min:2*Flow trigger benefits, and taxes), a = autonomous consumption (consumption when income is zero. What is her alveolar ventilation?4.20 L/min, 55. Here you can see a calculation of the estimated oxygen requirement for a HAMILTONC1 ventilator based on the following parameters: Expiratory minute volume (ExpMinVol): 8 l/min Total minute volume leakage (MVleak): 1 l/min Base flow: 3 l/min Set duration (FiO2): 60% Planned duration of transport: 120 min This cookie is set by GDPR Cookie Consent plugin. Then set off the stopwatch and begin walking as quickly as you can, but do not run! calculates Respiratory Quotient (CO2 production/O2 consumption) and Resting Energy Expenditure (REE) Principles production of chemical energy is proportional to gas exchange Weir equation used to calculate energy expenditure: Energy expenditure = (3.9VO2 - 1.1VCO2) - 2.17 (urinary nitrogen) At a normal body temperature, what is the partial pressure of water vapor?47 mmHg. Enter Total Supply Step 3. It can be a lifesaving machine if you have a condition that makes it hard for you to breathe properly or when you can't breathe on. The form is based on the following formulas and determinations. That way you'd know approximately how much your vent used in case you needed it. The doctor has requested the static compliance measurement for an adult patient who is receiving mechanical ventilation. You will also need a stopwatch and a metronome. 31. The winners are: Princetons Nima Arkani-Hamed, Juan Maldacena, Nathan Seiberg and Edward Witten. While the basic principle applies to most makes and models, the calculation depends on several parameters that may differ. There is no physical activity required. Note that this calcuation provides you with an estimate only and the actual consumption may be higher. /Type /Page Nota: ASAFINTECH es una asociacin gremial de empresas. 4.0,` 3p H.Hi@A> What amount of volume was lost in the ventilator tubing?60 mL, 45. This cookie is set by GDPR Cookie Consent plugin. We also use third-party cookies that help us analyze and understand how you use this website. A respirometer measures how much oxygen is used during cellular respiration. Duration of Flow = Oxygen Tank Conversion Factor * Remaining Tank Pressure (psi) / Continuous Flow Rate (L/min) Oxygen Cylinder Conversion Factors D Tank = 0.16 E Tank = 0.28 G Tank = 2.41 H/K Tank = 3.14 M tank = 1.56 Read and download literature for the Z Vent for EMS, Z Vent for Hospital, and the EMV+ for Military . K0iABZyCAP8C@&*CP=#t] 4}a ;GDxJ> ,_@FXDBX$!k"EHqaYbVabJ0cVL6f3bX'?v 6-V``[a;p~\2n5 &x*sb|! 33. Uniform mixing of LN or CO2 with room air. Oxygen Consumption Calculations: Consumption is liters per day of 100% O2 consumed, unless otherwise stated or set by the user. 3 0 obj <>stream What is the formula for Charless law?V1 / T1 = V2 / T2, 15. Note: This section contains additional practice questions for you to practice and test your knowledge. A medical ventilator is a machine that helps your lungs work. Measuring rates of reaction Rate is most often calculated using the equation: rate = 1 t i m e where the time is the time for the reaction to reach a certain point or the time for the reaction to be completed. When activated, the O2 consumption is displayed in the System > Info window. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Faarc, Kacmarek Robert PhD Rrt, et al. A lot of training is based on the VO2 max percentage value to specify their intensity (see the training pace calculator). RPE = or > 18. Ventilation rate is expressed as the volume of gas entering or leaving the lungs in a given amount of time. What is the formula for minute ventilation?MV = Respiratory Rate x Tidal Volume, 20. Then you can easily plug the numbers in to quickly calculate the correct answer. If you're a more well-rounded athlete, checking your one-rep max number may also give you valuable insights (see one-rep max calculator). How do you calculate the rate of oxygen consumption over the first minute? VO2 max calculator is intended for every sportsperson who wants to find their maximal aerobic capacity value. The LTV 1200 Series ventilator, is able to accommodate adult to pediatric patients, and is ideal for patient transport particularly ER or emergency services. The rate of a reaction can be calculated by dividing the change in the amount of reactant or product by the time taken, as shown in the equation below. endobj How do you calculate the rate of oxygen consumption over the first minute? You will need to calculate a patients IBW multiple times on the TMC Exam. What is the expiratory time when the rate is set to 25/min and the inspiratory time is 0.75 seconds?1.65 seconds, 49. endobj 3. 1. Due to geographical challenges and limited resources, clinicians developed novel strategies for managing patients. (760 47) x 0.21 = 149.7. . Most of our vents have the Bias Flow set at 5 LPM FiO2 Oxygen consumption will vary depending on set FiO2 At 100%, the total volume is supplied from the Oxygen tank. The common formula is as follows: Vo2 Max = maximum milliliters of oxygen consumed in 1 minute ________________________________ body weight in kilograms endobj Oxigraf provides a complete system for validating the performance of your OBIGG system. PEEP was 2 cm H 2 O in all groups. The calculation of percentage of oxygen in the air after the evaporation of a volume of liquefied gas nitrogen or solid CO2 in a confined space. Math doesnt have to be all that bad! Calculate the volume of the released gas (Vg) by multiplying the volume of the liquid nitrogen (in liters) or weight of solid carbon dioxide (in Kg) by the expansion ratio of LN (.682) or the inverse density of CO2 (.552 m3/Kg). Divide your maximum heart rate (187 bpm) by your resting heart rate (60 bpm) and multiply by 15.3. A ventilator is a device that supports or takes over the breathing process, pumping air into the lungs. f hO^;`3yoLlF"m` ! /Contents 11 0 R John Landry is a registered respiratory therapist from Memphis, TN, and has a bachelor's degree in kinesiology. Let's do an example calculation. We also have a dedicated VO2 max calculator for runners the VO2 max runners calculator. /Title /CreationDate (D:20210603235749+02'00') Oxygen output in pulse dose settings is not directly comparable to continuous liter flow. Use our online O2 To Go Online Cylinder Duration Calculator below or download the mobile app for free: iPhoneorAndroid. Heat pump retrofits are available for small businesses that have an electric account labeled "Small General Service . High-Flow Nasal Cannula Oxygen and Noninvasive Ventilation Recommendations For adults with COVID-19 and acute hypoxemic respiratory failure despite conventional oxygen therapy, the Panel recommends starting therapy with HFNC oxygen; if patients fail to respond, NIV or intubation and mechanical ventilation should be initiated ( BIIa ). After collecting the essential data during the test, you only need to enter them into the calculator fields immediately afterward, you can see your maximal aerobic capacity value in ml/kg/min units. 4 0 obj As previously, do some basic stretching and warm up before the test. endobj All resources are student and donor supported. XXy-1)mBW Rpaf,ggl&vY66N+/q:gdt_2ddFiV\Oi:;}:zgi9?rW\nG Answer: In this trace there are 10 peaks during the 60 seconds, so the breathing rate is 10 breaths per minute. /Annots [] Predicts outcomes, especially in pediatric patients; helps determine need for ECMO. << Input your information below to calculate the approximate cylinder duration. If both V o 2 and oxygen delivery are calculated as the product of cardiac output and either C(a-v)O 2 or CaO 2, mathematical coupling of data will result. If the alveolar gas has a PO2 of 100 mmHg, what is the PO2 of the pulmonary capillary blood?100 mmHg, 27. A patient receiving mechanical ventilation has a PIP of 60 cmH2O and a plateau pressure of 45 cmH2O. 1 COVID-19 AND OXYGEN CGD Note may 2020 Medical oxygen therapy is a core part of the treatment of patients with severe COVID-19. This website uses cookies to improve your experience while you navigate through the website. Monitor the position of the second hand on your watch and stop after it makes a quarter of a revolution around the dial. What is the average PCO2 of the exhaled air that can be measured by a capnograph?PeCO2, 42. If youre interested in getting access to more practice questions (like this one), definitely consider checking it out. << How do you calculate the rate of oxygen consumption from a spirometer trace? ventilator oxygen consumption calculatorcase de vanzare reading angliacase de vanzare reading anglia Keep reading to learn about the formulas, calculations, and equations that are required for respiratory therapy students. He has the following data: A. Eating While on a Ventilator. What are the three forms of consumption formula? even with no income, you may borrow to be able to buy food). This is a requirement for your exams in respiratory therapy school, and its also something that youll see on the TMC Exam. New Mexico's Flagship University | The University of New Mexico , Does Wittenberg have a strong Pre-Health professions program? PaO 2. mm Hg. Try to practice stepping up and down, according to the sequence: the left leg up, then the right, then the left leg down, and the right. >> The ventilator flow rate is set at 60 L/min. This cookie is set by GDPR Cookie Consent plugin. O*?f`gC/O+FFGGz)~wgbk?J9mdwi?cOO?w| x&mf As , EL NORTE is a melodrama divided into three acts. Then just. The average PIP reached during the delivery of a breath is 28 cmH2O. For a better experience, please enable JavaScript in your browser before proceeding. I think so! Results: The human lung consumes about 5-6 ml oxygen per minute at an esophageal temperature of 28 degrees C. Prebypass whole-body oxygen consumption measured at nearly normothermic conditions was 198 +/- 28 ml/min. O2 consumption = VO2 = QT x (CaO2 CvO2). gas supply pressures are continuously measured. 7 0 obj endobj 4 0 obj <> endobj 5 0 obj <> endobj 6 0 obj <>stream PA and Pa in the alveolar gas equation represent the gas pressures in what locations?PA represents the gas pressure in the alveoli. Sykes calculates the oxygen consumption (ml.min 1) for patients administered low-flow anaesthesia using the formula: (inspired O 2 fractionend-tidal O 2 fraction) minute ventilation 1, but we suggest that the alveolar minute ventilation, not the total minute ventilation, should be used for this calculation. Thille AW, Mercat A, et al. Please consult with a physician with any questions that you may have regarding a medical condition. VO2 = (milliliters of air inhaled per minute)(percentage of oxygen in the air inhaled) / (milliliters of air exhaled per minute)(percentage of oxygen in the air exhaled). The products shown here are not available for purchase by the general public. The Respiratory System in Equations (MS&A). What is the approximate duration of flow?112 minutes, 54. Some features are options. JavaScript is disabled. Simply input your device type (Conserver or Regulator), Liter Flow Setting, Cylinder Size and Approximate Fill Level to calculate the approximate cylinder duration. Maury, Bertrand. Hawkins MN, Raven PB, Snell PG, Stray-Gundersen J, Levine BD. Minute Ventilation (VE)VE = Respiratory Rate x Tidal Volume, Alveolar Minute Ventilation (VA)VA = Respiratory Rate x (Tidal Volume Deadspace), Airway Resistance (Raw)Raw = (PIP Plateau pressure) / Flow, Mean Airway Pressure (Paw)Paw = ((Inspiratory Time x Frequency) / 60) x (PIP PEEP) + PEEP, Work of Breathing (WOB)WOB = Change in Pressure x Change in Volume, Alveolar-Arterial Oxygen Tension Gradient (P(A-a)O2)P(A-a)O2 = PAO2 PaO2, Alveolar Oxygen Tension (PAO2)PAO2 = (PB PH2O) x FiO2 (PaCO2 / 0.8), Arterial/Alveolar Oxygen Tension (a/A) Ratio(a/A) Ratio = PaO2/PAO2, Arterial Oxygen Content (CaO2)CaO2 = (Hb x 1.34 x SaO2) + (PaO2 x 0.003), End-Capillary Oxygen Content (CcO2)CcO2 = (Hb x 1.34 x SaO2) + (PAO2 x 0.003), Mixed Venous Oxygen Content (CvO2)CvO2 = (Hb x 1.34 x SvO2) + (PvO2 x 0.003), Shunt Equation (QS/QT)QS/QT = (CcO2 CaO2) / (CcO2 CvO2), Modified Shunt Equation (QS/QT)QS/QT = ((PAO2 PaO2) x 0.003) / ((CaO2 CvO2) + (PAO2 PaO2) x 0.003), Arterial-Mixed Venous Oxygen Content Difference (C(a-v)O2)C(a-v)O2 = CaO2 CvO2, Oxygen-to-Air Entrainment Ratio (O2:Air)O2:Air = 1 : (100 FiO2) / (FiO2 2), Arterial Oxygen Saturation Estimation (SaO2)SaO2 = PaO2 + 30, PaO2/FiO2 Ratio (P/F Ratio)P/F Ratio = PaO2 / FiO2, Oxygenation Index (OI)OI = ((Paw x FiO2) / PaO2) x 100, Oxygen Consumption (VO2)VO2 = Cardiac Output x C(a-v)O2, Oxygen Extraction Ratio (O2ER)O2ER = (CaO2 CvO2) / CaO2, FiO2 Estimation for Nasal CannulaFiO2 = 20 + (4 x Liter Flow), Oxygen Cylinder DurationDuration = (Gauge Pressure x Tank Factor) / Liter Flow, Liquid Oxygen System DurationDuration = (344 x Liquid Weight) / Flow, Cardiac Index (CI)CI = Cardiac Output / Body Surface Area, Cardiac Output (QT)QT = Heart Rate x Stroke Volume, Cardiac Output (CO) Ficks MethodCO = (O2 Consumption / CaO2 CvO2), Cerebral Perfusion Pressure (CPP)CPP = Mean Arterial Pressure Intracranial Pressure, Mean Arterial Pressure (MAP)MAP = (Systolic BP + (2 x Diastolic BP)) / 3, Stroke Volume (SV)SV = Cardiac Output / Heart Rate, Maximum Heart Rate (HRmax)HRmax = 220 Age, Heart Rate on an EKG Strip (HR) HR = 300 / # of large boxes between R waves, Systemic Vascular Resistance (SVR)SVR = (MAP CVP) x (80 / Cardiac Output), Pulmonary Vascular Resistance (PVR)PVR = (MPAP PCWP) x (80 / Cardiac Output), Static Compliance (Cst)Cst = Tidal Volume / (Plateau Pressure PEEP), Dynamic Compliance (Cdyn)Cdyn = Tidal Volume / (Peak Pressure PEEP), Deadspace to Tidal Volume Ratio (VD/VT)(VD/VT) = (PaCO2 PECO2) / PaCO2, Children Dosage EstimationChild Dose = (Age / Age + 12) x Adult Dose, Infant Dosage EstimationInfant Dose = (Body Weight in lbs / 150) x Adult Dose, Infant and Children Dosage Estimation (Frieds Rule)Infant or Child Dose = (Age in Months / 150) x Adult Dose, Body Surface Area (BSA)BSA = ((4 x Body Weight) + 7) / (Body Weight + 90), ElastanceElastance = Change in Pressure / Change in Volume, Smoking Use Calculation (Pack Years)Pack Years = (Packs Smoked per Day) x (Number of Years Smoked), Suction Catheter Size EstimationCatheter Size = (Internal Diameter / 2) x 3, Endotracheal Tube Size Estimation in ChildrenTube Size = (Age + 16) / 4, LaPlaces LawP = (2 x Surface Tension) / Radius, Celsius to Fahrenheit Temperature ConversionF = (C x 1.8) + 32, Fahrenheit to Celsius Temperature ConversionC = (F 32) / 1.8, Celsius to Kelvins Temperature ConversionK = C + 273, Helium/Oxygen Conversion (He/O2)Actual Flow = Given Flow Rate x Factor, Total Lung Capacity (TLC)TLC = IRV + VT + ERV + RVTLC = VC + RVTLC = IC + FRC, Vital Capacity (VC)VC = IRV + VT + ERVVC = IC + ERVVC = TLC RV, Inspiratory Capacity (IC)IC = IRV + VTIC = TLC FRCIC = VC ERV, Functional Residual Capacity (FRC)FRC = ERV + RVFRC = TLC IC, Time Constant (t)t = Compliance x Resistance, Ideal Body Weight (IBW)IBW = 50 kg + (2 x Number of Inches over 5 feet), Tidal Volume (VT)VT = Flow rate x Inspiratory Time, Exhaled Tidal Volume (VT)VT = Minute Ventilation / Frequency, Corrected Tidal Volume (VT)VT = Expired Tidal Volume Tube Volume, Pressure Support Ventilator Setting (PSV)PSV = ((Peak Pressure Plateau Pressure) / Set Flow) x Peak Flow, Rapid Shallow Breathing Index (RSBI)RSBI = Rate / Tidal Volume, Minimum Flow Rate in Mechanical VentilationFlow Rate = Minute Ventilation x I:E Ratio Sum of Parts, Winters FormulaExpected PaCO2 = (1.5 x HCO3-) + 8 2.