TY - JOUR
T1 - Non-invasive haemoglobin estimation in patients with thalassaemia major
AU - Al Khabori, Murtadha K.
AU - Al-Riyami, Arwa Z.
AU - Al-Farsi, Khalil
AU - Al-Huneini, Mohammed
AU - Al-Hashim, Abdulhakeem
AU - Al-Kemyani, Nasser
AU - Al-Qarshoubi, Issa
AU - Khan, Hammad
AU - Al-Amrani, Khalfan
AU - Daar, Shahina
N1 - Publisher Copyright:
© 2014, Sultan Qaboos University. All rights reserved.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Objectives: This study aimed to validate pulse CO-oximetry-based haemoglobin (Hb) estimation in children and adults with thalassaemia major (TM) and to determine the impact of different baseline variables on the accuracy of the estimation. Methods: This observational study was conducted over a fve-week period from March to April 2012. A total of 108 patients with TM attending the daycare thalassaemia centre of a tertiary care hospital in Muscat, Oman, were enrolled. Spot (Sp) Hb measurements were estimated using a Pronto-7® pulse CO-oximetry device (Masimo Corp., Irvine, California, USA). These were compared to venous samples of Hb using the CELL-DYN Sapphire Hematology Analyzer (Abbott Diagnostics, Abbott Park, Illinois, USA) to determine the reference (Ref) Hb levels. A multivariable linear regression model was used to assess the impact of baseline variables such as age, gender, weight, height, Ref Hb and blood pressure on the Hb estimations. Results: Of the 108 enrolled patients, there were 54 males and 54 females with a mean age of 21.6 years (standard deviation [SD] = 7.3 years; range: 2.5–38 years). Te mean Ref Hb and Sp Hb were 9.4 g/dL (SD = 0.9 g/dL; range: 7.5–12.3 g/dL) and 11.1 g/dL (SD = 1.2 g/dL; range: 7.5–14.7 g/dL), respectively. Te coefficient of determination (R2) was 21% with a mean difference of 1.7 g/dL (SD = 1.1 g/dL; range: -0.9–4.3 g/dL). In the multivariable model, the Ref Hb level (P = 0.001) was the only statistically significant predictor. Conclusion: Te Pronto-7® pulse CO-oximetry device was found to overestimate Hb levels in patients with TM and therefore cannot be recommended. Further larger studies are needed to confirm these results.
AB - Objectives: This study aimed to validate pulse CO-oximetry-based haemoglobin (Hb) estimation in children and adults with thalassaemia major (TM) and to determine the impact of different baseline variables on the accuracy of the estimation. Methods: This observational study was conducted over a fve-week period from March to April 2012. A total of 108 patients with TM attending the daycare thalassaemia centre of a tertiary care hospital in Muscat, Oman, were enrolled. Spot (Sp) Hb measurements were estimated using a Pronto-7® pulse CO-oximetry device (Masimo Corp., Irvine, California, USA). These were compared to venous samples of Hb using the CELL-DYN Sapphire Hematology Analyzer (Abbott Diagnostics, Abbott Park, Illinois, USA) to determine the reference (Ref) Hb levels. A multivariable linear regression model was used to assess the impact of baseline variables such as age, gender, weight, height, Ref Hb and blood pressure on the Hb estimations. Results: Of the 108 enrolled patients, there were 54 males and 54 females with a mean age of 21.6 years (standard deviation [SD] = 7.3 years; range: 2.5–38 years). Te mean Ref Hb and Sp Hb were 9.4 g/dL (SD = 0.9 g/dL; range: 7.5–12.3 g/dL) and 11.1 g/dL (SD = 1.2 g/dL; range: 7.5–14.7 g/dL), respectively. Te coefficient of determination (R2) was 21% with a mean difference of 1.7 g/dL (SD = 1.1 g/dL; range: -0.9–4.3 g/dL). In the multivariable model, the Ref Hb level (P = 0.001) was the only statistically significant predictor. Conclusion: Te Pronto-7® pulse CO-oximetry device was found to overestimate Hb levels in patients with TM and therefore cannot be recommended. Further larger studies are needed to confirm these results.
KW - Beta talassemia
KW - Hemoglobin
KW - Pulse oximetry
KW - Validation studies
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M3 - Article
AN - SCOPUS:84907978181
SN - 2075-051X
VL - 14
SP - e468-e472
JO - Sultan Qaboos University Medical Journal
JF - Sultan Qaboos University Medical Journal
IS - 4
ER -