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'''Fraction of inspired oxygen''' ('''''Fi''O<sub>2</sub>''') is the fraction or percentage of oxygen in the space being measured. Medical patients experiencing difficulty breathing are provided with oxygen-enriched air, which means a higher-than-atmospheric ''Fi''O<sub>2</sub>. Natural air includes 20.9% oxygen, which is equivalent to ''Fi''O<sub>2</sub> of 0.21. Oxygen-enriched air has a higher ''Fi''O<sub>2</sub> than 0.21, up to 1.00, which means 100% oxygen.<ref>http://in.answers.yahoo.com/question/index?qid=20070307165629AAxDALx</ref> ''Fi''O<sub>2</sub> is typically maintained below 0.5 even with mechanical ventilation, to avoid [[oxygen toxicity]].<ref>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2688103/</ref>
The London schedule has long had cheerleaders for its talent on home territory, but in the past it has been squeezed out by more commercially robust cities.<br><br>Now it seems the capital is holding its ground against the bigger boys, as more and more international press, and buyers, make London an important stop in their schedule - blizzards in New York notwithstanding.<br>This in part has been due to brands like Burberry Prorsum, Mulberry and Tom Ford, which, with the weight of their advertising budgets behind them, command an international audience. Topshop, led by creative director Kate Phelan, also of British Vogue, has also helped provide financial support and a professional framework in which the creativity of London�s emerging designers can be showcased.<br><br>This situation has not gone unnoticed in Milan, where Giorgio Armani has taken Stella Jean under his wing, hosting her spring/summer 2014 show last September. �The new generation of Italian designers needs our support,� said Armani, echoing the sentiment that has long made London great<br>
LVMH (the parent company of brands such as Louis Vuitton, Christian Dior and Celine) is also taking lessons from London: on Thursday it announced a shortlist of 30 designers for its inaugural LVMH Young Fashion Designer Prize. With �300,000 (�246,000) at stake, plus a year of mentoring, the number of London designers shortlisted, including Simone Rocha, Thomas Tait, Meadham Kirchhoff and J JS Lee, is a clear indication of the capital�s fertile groun<br><br>
Fittingly, the nominees - many of which have come through support programmes Newgen and Fashion East - are some of the most exciting shows on the schedul<br>
Korean-born J JS Lee, who trained at Central Saint Martins, took the prized opening slot yesterday in rain-swept central London. For autumn/winter 2014 she showed an elegant collection of brushed mohair, plaid overcoats and formal dresses - experimenting with cocoon shapes, biker jackets and rounded shoulders for the former, while playing with different lengths for the latte<br><br>
Cobalt blue houndstooth as a laser-cut detail and d�grad� printed silk provided a jolt of colour in a predominantly cream, navy and forest-green palette. Slim, long-line trousers were an elegant proposition for evenings, while chunky, cable knits were covetably co<br>.
The London College of Fashion MA Show at the Waldorf Astoria Hotel on day one of London Fashion Week yesterday (PA) With a fit-to-burst schedule of shows, presentations and parties over the next four days, there�s plenty to inspire and excite the fashion world - both on and off the catwa<br><br>


Often used in [[medicine]] the ''Fi''O<sub>2</sub> is used to represent the percentage of oxygen participating in gas-exchange. If the barometric pressure changes, the ''Fi''O<sub>2</sub> may remain constant while the [[partial pressure]] of oxygen changes with the change in barometric pressure.
JW Anderson�s first womenswear collection since LVMH bought a minority stake in his business last September is sure to  [http://www.pcs-systems.co.uk/Images/celinebag.aspx http://www.pcs-systems.co.uk/Images/celinebag.aspx] be as controversial as ever: the designer�s gender-blurring take on dressing has its detractors, but just as many fans. The designer was also appointed creative director of Loewe, a Spanish leather brand within the stable, so an excellent accessories offering is to be expect<br><br>


== Equations ==
It was all change at Mulberry last season too, as Emma Hill departed after five years as [http://Www.dict.cc/englisch-deutsch/creative+director.html creative director] of the British brand. Hill seemed to have hit on a winning formula: balancing design and the right kind of celebrity endorsements fortified the brand�s finances, but recent profit warnings are cited as the reason for her departu<br><br>
;Abbreviated alveolar air equation
::<math>P_A O_2 = \frac{P_E O_2 - P_i O_2 \frac{V_D}{V_t}}{1- \frac{V_D}{V_t}}</math>
P<sub>A</sub>O<sub>2</sub>, P<sub>E</sub>O<sub>2</sub>, and P<sub>i</sub>O<sub>2</sub> are the partial pressures of oxygen in alveolar, expired, and inspired gas, respectively, and VD/VT is the ratio of physiologic dead space over tidal volume.


== Medicine ==
This season, the brand will not be hosting its usual catwalk extravaganza in Claridge�s ballroom. Instead it has announced a photocall at which Cara Delevingne, its campaign face, will reveal the brand�s next big move. Speculation is rife that she will be announced as creative director, but the brand�s success with bags named after It girls makes the debut of the �Cara� a far more likely prosp<br><br>
In medicine the ''Fi''O<sub>2</sub> is the assumed percentage of oxygen concentration participating in [[gas exchange]] in the [[alveoli]].<ref name="pmid19050631">{{cite journal| author=Allardet-Servent J, Forel JM, Roch A, Guervilly C, Chiche L, Castanier M et al.| title=FIO2 and acute respiratory distress syndrome definition during lung protective ventilation. | journal=Crit Care Med | year= 2009 | volume= 37 | issue= 1 | pages= 202–7, e4-6 | pmid=19050631 | doi=10.1097/CCM.0b013e31819261db | pmc= | url= }}</ref>


== Uses ==
Joseph, celebrating 25 years since its first west London boutique opened, is presenting on schedule for the first time too. It may not have the budgets of its blockbuster digital rivals, but it is held in esteem by serious shoppers and the fashion cr<br><br><br>
The ratio between [[partial pressure]] of [[oxygen]] in [[arterial blood]] ([[PaO2]]) and ''Fi''O<sub>2</sub> is used as an indicator of [[hypoxemia]] per the American-European Consensus Conference on [[lung injury]]. A high ''Fi''O<sub>2</sub> has been shown to alter the ratio of PaO2/''Fi''O<sub>2</sub>.<ref name="pmid19050631"/>


== PaO2/FiO2 ratio ==
While there is a respectable coterie of British luxury brands, it�s the commercial pull of the high street that is unrivalled, something the British Fashion Council - responsible for co-ordinating the schedule - has cottoned on to. As well as Topshop�s premium offering Unique, now a regular on the schedule, the BFC has courted brands such as River Island, which debuted its collaboration with Rihanna in London this time last y<br>r.
The ratio of partial pressure arterial oxygen and fraction of inspired oxygen, sometimes called the ''Carrico index'', is a comparison between the oxygen level in the blood and the oxygen concentration that is breathed.  This helps to determine the degree of any problems with how the lungs transfer oxygen to the blood.<ref name="pmid15818095">{{cite journal| author=Toy P, Popovsky MA, Abraham E, Ambruso DR, Holness LG, Kopko PM et al.| title=Transfusion-related acute lung injury: definition and review. | journal=Crit Care Med | year= 2005 | volume= 33 | issue= 4 | pages= 721–6 | pmid=15818095 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=15818095  }}</ref> A sample of arterial blood is collected for this test.<ref>Tietz NW (Ed): Clinical Guide to Laboratory Tests, 3rd ed. W. B. Saunders, Philadelphia, PA, 1995.</ref> A PaO2/FiO2 ratio less than or equal to 200 mmHg is necessary for the diagnosis of [[acute respiratory distress syndrome]] by the AECC criteria. <ref>Mason, R. Murray and Nadel's Textbook of Respiratory Medicine, 5th ed. Philadelphia, PA 2010</ref> The more recent Berlin criteria defines mild ARDS at a ratio of <300.
Now Whistles is presenting on the schedule for autumn/winter 2014; with a mens collection rumoured to be on the horizon and a flagship store on Mayfair�s Dover Street, the brand is certainly looking to exp<br><br>


A PaO2/FiO2 ratio less than or equal to 250 mmHg is one of the minor criteria for severe [[community acquired pneumonia]] (i.e., possible indication for inpatient treatment).
So too are Christopher Kane and Roksanda Ilincic, who plan to open boutiques on Mount Street this year.
 
A PaO2/FiO2 ratio less than or equal to 333 mmHg is one of the variables in the [[SMART-COP]] risk score for intensive respiratory or vasopressor support in community-acquired pneumonia.
 
== Related mathematics ==
 
=== Alveolar air equation ===
The [[alveolar air equation]] is the following formula, used to calculate the partial pressure of alveolar gas:
:<math> P_A O_2 =  F_I O_2(PB-P H_2 0) - P_A CO_2 (F_I O_2 + \frac{1-FIO2}{R})</math>
 
== See also ==
* [[Oxygen toxicity]]
 
==References==
{{reflist|30em}}
 
{{Diving medicine, physiology and physics}}
 
[[Category:Pulmonology]]
[[Category:Mechanical ventilation]]

Latest revision as of 01:02, 19 December 2014

The London schedule has long had cheerleaders for its talent on home territory, but in the past it has been squeezed out by more commercially robust cities.

Now it seems the capital is holding its ground against the bigger boys, as more and more international press, and buyers, make London an important stop in their schedule - blizzards in New York notwithstanding.
This in part has been due to brands like Burberry Prorsum, Mulberry and Tom Ford, which, with the weight of their advertising budgets behind them, command an international audience. Topshop, led by creative director Kate Phelan, also of British Vogue, has also helped provide financial support and a professional framework in which the creativity of London�s emerging designers can be showcased.

This situation has not gone unnoticed in Milan, where Giorgio Armani has taken Stella Jean under his wing, hosting her spring/summer 2014 show last September. �The new generation of Italian designers needs our support,� said Armani, echoing the sentiment that has long made London great
LVMH (the parent company of brands such as Louis Vuitton, Christian Dior and Celine) is also taking lessons from London: on Thursday it announced a shortlist of 30 designers for its inaugural LVMH Young Fashion Designer Prize. With �300,000 (�246,000) at stake, plus a year of mentoring, the number of London designers shortlisted, including Simone Rocha, Thomas Tait, Meadham Kirchhoff and J JS Lee, is a clear indication of the capital�s fertile groun

Fittingly, the nominees - many of which have come through support programmes Newgen and Fashion East - are some of the most exciting shows on the schedul
Korean-born J JS Lee, who trained at Central Saint Martins, took the prized opening slot yesterday in rain-swept central London. For autumn/winter 2014 she showed an elegant collection of brushed mohair, plaid overcoats and formal dresses - experimenting with cocoon shapes, biker jackets and rounded shoulders for the former, while playing with different lengths for the latte

Cobalt blue houndstooth as a laser-cut detail and d�grad� printed silk provided a jolt of colour in a predominantly cream, navy and forest-green palette. Slim, long-line trousers were an elegant proposition for evenings, while chunky, cable knits were covetably co
. The London College of Fashion MA Show at the Waldorf Astoria Hotel on day one of London Fashion Week yesterday (PA) With a fit-to-burst schedule of shows, presentations and parties over the next four days, there�s plenty to inspire and excite the fashion world - both on and off the catwa

JW Anderson�s first womenswear collection since LVMH bought a minority stake in his business last September is sure to http://www.pcs-systems.co.uk/Images/celinebag.aspx be as controversial as ever: the designer�s gender-blurring take on dressing has its detractors, but just as many fans. The designer was also appointed creative director of Loewe, a Spanish leather brand within the stable, so an excellent accessories offering is to be expect

It was all change at Mulberry last season too, as Emma Hill departed after five years as creative director of the British brand. Hill seemed to have hit on a winning formula: balancing design and the right kind of celebrity endorsements fortified the brand�s finances, but recent profit warnings are cited as the reason for her departu

This season, the brand will not be hosting its usual catwalk extravaganza in Claridge�s ballroom. Instead it has announced a photocall at which Cara Delevingne, its campaign face, will reveal the brand�s next big move. Speculation is rife that she will be announced as creative director, but the brand�s success with bags named after It girls makes the debut of the �Cara� a far more likely prosp

Joseph, celebrating 25 years since its first west London boutique opened, is presenting on schedule for the first time too. It may not have the budgets of its blockbuster digital rivals, but it is held in esteem by serious shoppers and the fashion cr


While there is a respectable coterie of British luxury brands, it�s the commercial pull of the high street that is unrivalled, something the British Fashion Council - responsible for co-ordinating the schedule - has cottoned on to. As well as Topshop�s premium offering Unique, now a regular on the schedule, the BFC has courted brands such as River Island, which debuted its collaboration with Rihanna in London this time last y
r. Now Whistles is presenting on the schedule for autumn/winter 2014; with a mens collection rumoured to be on the horizon and a flagship store on Mayfair�s Dover Street, the brand is certainly looking to exp

So too are Christopher Kane and Roksanda Ilincic, who plan to open boutiques on Mount Street this year.