Oxygenation

Oxygenation

Monitoring the

To

Editor:

Ghows

et

al

conclude

transcutaneous patients

their

oxygen

recent

electrode

undergoing

report’

can reliably

bronchoscopy.

by

saying

monitor

Their

data

that

a

oxygenation

do

not

in

support

this

contention. With

arterial

normal

transcutaneous

while 80

with

mm

a tcPo5 the

internist

less

than

65

adverse

Hg.

mm

effects.”

such

in

expense

and

Their time tcPo,

may

caused

no

reasonable

for

him

gas analysis.

been

affected pressure

upon

and

(Biochem

and

the

before

avoid

the

pre-bronchoscopy

response state after

problem

that

upon

in the

design

applying

reaching

is on the

oscillations

electrode perfusion, time

study. skin,

tyPo2

this

value

will

tissue

of the

agents.2

the

oxygen

not

values

position

skin

to mention

of the

This

might

below

will

rise,

interference

monitor’s

that

“measurements

of tcPo2

correlated

not.

The

coefficient

of 0.69

blood

stable

patients

and

agreement

from

conclusion

characteristics

in

stable

not

are

between

below

cost and

Transcutaneous We

with

authors Pa02.”

state They

this point,

did

as it indicates

tcPo2 was r2 = 0.476).

that

measurements,

that

amazing

if two

electrode)

the

two

(blood

with Pa02, accuracy between

tcPo2

of arterial

oxygen

the

confidence

intervals

and

against

Pa02

for the

means

Pa02

MarkJ.

well

is safe and

mean

difference

of

values,

even

tcPo2

of the

if excellent

two and

Robinson found

significant

PaO,.4

pected

and

safe

“afibrds in

a

hemo-

blood

of transcutaneous tcPo2

between

fluid

the

27 patients

Lanigan,

King’s

Ponte,

College

MB.,

M.D.,

School

of Medicine King’s

and London,

asbestosis in

pleural

disease.

and

examined

Dentistry,

(mean

about recovery

be overlooked.

England

hypochloride

REFERENCES

Josen

MJ,

Chuang

MT,

Sacks

HS,

Tserstin

932

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AS.

of

of

cytospin

ie, only

of London,

131

for such

probably

of asbestos

disagree BAL

(defined

by

similiar

patients

cells),

with

We

conclude

fluid

with

amount

low AB concentrations

filtration;2 10/mi

benign

two

studies

of fluid

is

et per

al

slide,

recovered can easily

at least 20 ml of fluid after with

fluid)

own of 59

radiologic

10 cells

so that

and

our

Robinson

total

we examine

By contrast,

which

of 58 and

the

Indeed,

of BAL

with

of the

of AB (less than

patients

between

20 of

type

asbestos-related

nature.

BAL

since

fluid

clinical

with

discrepancy

technical

in the

an asbestos

results

percent

49.108

(AB)

in the

they An unex-

surprising

AB

preparations 0.2

more

found

a large a

bodies

all the Those

bronchoalveolar As expected,

alveolitis.

to crocidolite,

138

digestion

concentrations

MB,

bodies.

wih

asbestosis.

eosinophilic

patients,

we

and reason

absence

Indeed, with

is

and

asbestos

criteria)

two

experience with

exposed

patients

F. F.A.R.C.S.,

College

been

moni-

M.R.C.PI.,

Ph.D.,

forms

the

of their

values

The Coim

was

had

experience.

their

in patients

neutrophilic

finding

easily

gas

al’ reported

studies

of one-third

most Jose

et

90 percent

sensor

con-elation

York

Editor:

(BAL)

is neither

to check

To the

lavage

to arterial

necessity

of Medicine, Medical Center

BAL in Asbestosis

of the

oxygenation reference

M.D.,

New

related.

guide,

and

oxygen

studies

warn

not

mean

sentence

monitoring

and

Ph.D.,

be

tells us little A plot of the

difference

a cutaneous

in

significantly

helpful

between

Yet well-conducted always

the

a more

reliable

trarsscutaneous were

reported monitor.

concluding

adults”-without

it would

of the

F.C.C.P.,

M.D., S. Sacks,

Department Mount Sinai

in

present.

1 Chows

Rosen,

Henry

proves

variability

statistically

against

of the

that

in adults

and

quantity

were

be

as it suggests stable

analyzer

same

would

authors’

measurement. toring

and

in the

reliable

dynamically

gas the

calculation

implication

safe

of the

however,

the degree of correlation of the transcutaneous

estimates allow

related;

of tcPo,

differences

cautious,

50 percent

are

to measure

measurements

correlated about the

nor

than

methods

methods

designed

Although

The

less

level

justifies

bronchoscopy.

accounted for by changes in Pa02 values (variance They further quote a significance value of p