Hidden blood loss and its influential factors after total hip arthroplasty

Journal of Orthopaedic Surgery and Research

Yuji Wang¹  Chao Zhuang²  Rongbin Sun²  Nanwei Xu²  Xianju Zhou³  Su Ni¹  Kaisong Miao¹ 

[1] Laboratory of Clinical Orthopaedics, Department of Orthopaedics, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, 29 Xinglong Alley, Changzhou 213003, People’s Republic of China;Department of Orthopaedics, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, 29 Xinglong Alley, Changzhou 213003, People’s Republic of China;Laboratory of Neurological Diseases, Department of Neurology, Changzhou No.2 People’s Hospital, the Affiliated Hospital of Nanjing Medical University, 29 Xinglong Alley, Changzhou 213003, People’s Republic of China

关键词: Multiple and stepwise regression;    Gross formula;    Total hip arthroplasty;    Influential factors;    Hidden blood loss;   

Others  :  1146033
DOI  :  10.1186/s13018-015-0185-9

 received in 2014-11-10, accepted in 2015-01-13,  发布年份 2015

【 摘 要 】

Background

Total hip arthroplasty (THA) is a vital therapy for various hip joint diseases. However, patients have lower hemoglobin level post-operatively, remarkably inconsistent with the measured blood loss. The inconsistence is majorly attributed to hidden blood loss (HBL). In this study, we investigated the HBL and its influential factors among patients after THA.

Methods

From January 2008 to June 2014, 322 patients (99 males and 223 females) undergoing THA were enrolled in this study. All patients were assessed comprehensively before the operation. The demographic information of the patients was collected. Intra-operative and post-operative blood loss was recorded, and then, the total perioperative blood loss and the HBL were calculated. Influential factors were further analyzed by multiple and stepwise regression.

Results

The HBL was 429 ± 223 mL, with a percentage of 35.4% ± 11.0% in the total perioperative blood loss (1,155 ± 377 mL). Multiple and stepwise regression analysis revealed that HBL was positively associated with body mass index (BMI), blood transfusion volume, length of incision, change of hematocrit (HCT) between pre-operation and post-operation but negatively associated with age. As compared to male patients, female patients had a risk of increased HBL. Development displasia hip (DDH) patients had a less risk of HBL in all patients.

Conclusion

HBL is a significant portion of total blood loss in the patients after THA. Gender, age, BMI, blood transfusion, length of incision, change of HCT, and diagnosis are influential factors of HBL.

【 授权许可】

   
2015 Miao et al.; licensee BioMed Central.

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