Reliability of Transcutaneous Po2 With Roche Oxygen Monitor 5300 at 44 C in Newborn Infants With RDS

PEDIATRICS ◽  
1976 ◽  
Vol 58 (2) ◽  
pp. 299-301
Author(s):  
Diego Mieth ◽  
Jean L. Micheli ◽  
Gabriel Duc ◽  
S. Ferdico
Keyword(s):  
Core Temperature ◽  
Newborn Infants ◽  
Skin Tests ◽  
Poor Correlation ◽  
The Poor ◽  
Arterial Po2 ◽  
Transcutaneous Po2 ◽  
Oxygen Monitor

Since the publication of our letter,1 further data have been assembled with the Roche Oxygen Monitor 5300. Our earlier investigations and those reported by others2,3 have shown that the poor correlation between arterial Po2 and cutaneous Po2 is obtained in patients with RDS, if this type of skin electrode4 is warmed to 42 C. Since these results were possibly due to an insufficient local arterialization of the skin, tests were repeated at a sensor core temperature of 44 C.

Skin Oxygen Permeability in Premature Infants

PEDIATRICS ◽  
1978 ◽  
Vol 62 (4) ◽  
pp. 488-491
Author(s):  
Hans T. Versmold ◽  
Mathäus Holzmann ◽  
Otwin Linderkamp ◽  
Klaus P. Riegel
Keyword(s):  
Blood Flow ◽  
Premature Infants ◽  
Oxygen Diffusion ◽  
Oxygen Permeability ◽  
Newborn Infants ◽  
Skin Surface ◽  
The Mean ◽  
Arterial Po2 ◽  
Skin Temperatures ◽  
Transcutaneous Po2

While 24 newborn infants (ages, 2 to 48 hours; gestational ages, 24 to 42 weeks) breathed various concentrations of oxygen, the PO2 values on their unheated skin surface were measured by an unheated microcathode electrode for transcutaneous PO2 monitoring. In infants with arterial PO2 values in the range of 50 to 100 torr and with similar skin temperatures, the mean surface PO2 of unheated skin was inversely related to birth weight: 27.2 torr in infants weighing less than 1,500 gm, 14.3 torr in infants weighing 1,500 to 2,500 gm, and 2.9 torr in infants weighing more than 2,500 gm. In the smallest infants, the skin surface PO2 was significantly related to arterial P02: it was about one third of arterial PO2 as estimated by a second electrode for transcutaneous PO2 monitoring heated to 44°C. Phototherapy, crying, or blood transfusion increased the surface P02 of unheated skin, but not the tcPO2 measured at 44°C. These findings suggest that blood flow to the skin in excess of its metabolic needs due to immature control of cutaneous circulation, along with low resistance to oxygen diffusion, determines the high oxygen permeability of skin in premature infants.

Is Transcutaneous Po2, Reliable for Arterial Oxygen Monitoring in Newborn Infants?

PEDIATRICS ◽  
1975 ◽  
Vol 55 (4) ◽  
pp. 566-567
Author(s):  
Gabriel Duc ◽  
Hans U. Bucher ◽  
Jean L. Micheli ◽  
B. A. Johanson
Keyword(s):  
Newborn Infants ◽  
Oxygen Electrode ◽  
High Oxygen ◽  
Arterial Oxygen ◽  
Oxygen Monitoring ◽  
Transcutaneous Po2 ◽  
Oxygen Monitor ◽  
Oxygen Concentrations

The necessity of frequent Po2 controls in newborns exposed to high oxygen concentrations entails the use of indwelling arterial catheters. Any method of bypassing the complications of arterial catheters would be a great advantage for the newborn. Recently, electrodes were engineered allowing transcutaneous Po2 (tc Po2) measurements. tested two of them, the oxygen monitor 5300 Roche and the oxygen electrode of Huch et al. Good correlation between tc Po2, and Po2, has been reported in both in the newborn.

Limitations of Transcutaneous Po2 and Pco2 Monitoring in Infants with Bronchopulmonary Dysplasia

PEDIATRICS ◽  
1984 ◽  
Vol 74 (2) ◽  
pp. 217-220
Author(s):  
Ellen S. Rome ◽  
Eileen K. Stork ◽  
Waldemar A. Carlo ◽  
Richard J. Martin
Keyword(s):  
Bronchopulmonary Dysplasia ◽  
Premature Infants ◽  
Neonatal Period ◽  
Postnatal Life ◽  
Pco2 Monitoring ◽  
Arterial Po2 ◽  
Transcutaneous Po2

Despite the well-documented correlation between transcutaneous and arterial Po2 and Pco2 in sick neonates, the effect of maturation on this relationship has not been well characterized. Eight premature infants with bronchopulmonary dysplasia (BPD) and indwelling arterial lines beyond the immediate neonatal period were studied. Transcutaneous Po2 always underestimated Pao2 beyond 10 weeks of postnatal life, such that transcutaneous Po2 - Pao2 was -16 ± 5 torr (P < .001). Corrected transcutaneous Pco2 simultaneously overestimated PaCo2 by 9 ± 3 torr (P < .001), although this occurred over a wider range of postnatal ages. Transcutaneous Po2 monitoring may be a useful tool for estimating Pao2 in this population, provided an appropriate correction is made beyond 10 weeks of age. It is suggested that caution be exercised when using transcutaneous Pco2 measurements to estimate absolute arterial values in older infants with bronchopulmonary dysplasia.

Effect of Acute Hemorrhage on Transcutaneous, Subcutaneous, Intramuscular, and Arterial Oxygen Tensions

PEDIATRICS ◽  
1980 ◽  
Vol 65 (5) ◽  
pp. 881-883
Author(s):  
Frederick A. Matsen ◽  
Craig R. Wyss ◽  
Racheal V. King ◽  
Charles W. Simmons
Keyword(s):  
Arterial Oxygen ◽  
Peripheral Blood Flow ◽  
Danger Signal ◽  
Close Approximation ◽  
Monitoring Method ◽  
Acute Hemorrhage ◽  
Tissue Po2 ◽  
Oxygen Tensions ◽  
Arterial Po2 ◽  
Transcutaneous Po2

Although transcutaneous Po2 is a close approximation of arterial Po2 in most neonates, infants in shock often show lower transcutaneous than arterial Po2 values. For a better understanding of this discrepancy, we investigated the effect of acute hemorrhage on transcutaneous, tissue, and arterial Po2 in rabbits. With progressive hemorrhage, transcutaneous and tissue Po2 values declined steeply while arterial Po2 values did not. We speculate that the progressive decrement in transcutaneous and tissue Po2 values with hemorrhage is produced by diminished peripheral blood flow. Rather than representing a failure of the transcutaneous Po2 monitoring method, we speculate that transcutaneous hypoxia with shock may be a clinically valuable danger signal.

scholarly journals Transcutaneous PO2 measurements in seriously ill newborn infants.

1975 ◽  
Vol 50 (12) ◽  
pp. 913-919 ◽  
Author(s):  
S Swanstrom ◽  
I Villa Elisaga ◽  
L Cardona ◽  
A Cardenes ◽  
C Mendez-Bauer ◽  
...  
Keyword(s):  
Newborn Infants ◽  
Seriously Ill ◽  
Transcutaneous Po2

scholarly journals ASPECTOS GEOQUÍMICOS Y AMBIENTALES DE LOS SEDIMENTOS DEL RÍO CUCHIVERO, VENEZUELA.

2016 ◽  
Author(s):  
Arístide Márquez ◽  
Gregorio Martínez ◽  
Julio Figuera ◽  
Ivis Fermín ◽  
William James Senior ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Organic Carbon ◽  
Total Phosphorus ◽  
River Sediments ◽  
Point Of View ◽  
Poor Correlation ◽  
The Poor ◽  
Del Rio ◽  
Nitrogen Phosphorus

This paper reports the geochemical characteristics and environmental conditions of Cuchivero river sediments in Venezuela, depending on particle size, organic matter, organic carbon, nitrogen and total phosphorus, carbonates and heavy metals. The granulometry was typified by a predominance of sands with low organic matter (0.52 to 0.87%), organic carbon (0.06 to 0.09%) and carbonates content (0.54 to 2.61%) as well as high values of total nitrogen (602-985 mg / kg). The poor correlation between nitrogen, phosphorus and organic matter, suggests presence of nitrogen and total phosphorus of allochthonous origin and no Redfield organic matter. The average heavy metals in mg/kg, showed a descending concentration gradient, Fe (410)> Mn (63.14)> Zn (9.01)> Ni (3.38)> (2.21Cu)> Cr (2.09)> Co (1.13)> Cd (0.21) > Pb (0.07) mg / kg, with an association to the sands and carbonates, suggesting lithogenic origin. From the environmental point of view, there is no evidence of anthropogenic impact, as reflected by levels of organic matter and heavy metals which are below of the permissible values.

Transcutaneous Po2 Monitoring in Routine Management of Infants and Children With Cardiorespiratory Problems

PEDIATRICS ◽  
1976 ◽  
Vol 57 (5) ◽  
pp. 681-690
Author(s):  
R. Huch ◽  
A. Huch ◽  
M. Albani ◽  
M. Gabriel ◽  
F. J. Schulte ◽  
...  
Keyword(s):  
Intensive Care ◽  
Pediatric Intensive Care ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
Blood Gas ◽  
Close Correspondence ◽  
Arterial Po2 ◽  
Transcutaneous Po2 ◽  
Made In

Results are reported concerning the clinical application of the transcutaneous Po2 method (tc Po2 method) according to Huch et al. for monitoring arterial Po2. Thirty long-term continuous tc Po2 recordings were made in 22 ventilated children and infants with cardiorespiratory problems in four different pediatric intensive care units (Zürich, Göttingen, Kassel, and Mainz). These recordings were compared with 132 arterial Po2 determinations made during the same period of time. There was a linear relationship and a close correspondence between arterial Po2 and tc Po2 (r = .94). The continuous recordings have shown that the variability of Po2 is much greater than assumed so far by single blood gas analysis. This fact restricts greatly the value of single samples. Continuous tc Po2 monitoring has proved to be a great help in optimal respirator setting.

Sign in / Sign up

Export Citation Format

Share Document