Yun Yang, Fei Wang

Department of Orthopaedics, The Third People’s Hospital of Chengdu, Chengdu, China

Keywords: Hidden blood loss, risk factors, unilateral open-door cervical laminoplasty.


Objectives: This study aims to evaluate the hidden blood loss (HBL) and its possible risk factors after unilateral open-door cervical laminoplasty (UOCL) in patients with multilevel cervical spondylotic myelopathy (MCSM).

Patients and methods: Between January 2018 and March 2023, a total of 105 patients (55 males, 50 females; median age: 76 years; range, 52 to 93 years) who underwent C3-7 UOCL for MCSM were retrospectively analyzed. Data of the patients were recorded, including age, sex, height, weight, plasma albumin, blood glucose, hematocrit, American Society of Anesthesiologists (ASA) score, surgical time, and intraoperative blood loss. The HBL was calculated according to the Sehat formula, and risk factors were identified.

Results: The median surgical time was 180.7 min. The median total blood loss (TBL) and median HBL were 507.4 mL and 201.7 mL, respectively. Correlation analyses revealed that body mass index and surgical time were correlated with HBL (p<0.05). However, multiple linear regression analysis showed that HBL was positively correlated with surgical time (β=0.293, p<0.05).

Conclusion: Our study results showed that surgical time is an independent risk factor for HBL. Therefore, HBL should not be overlooked in patients with MCSM undergoing UOCL, particularly in the patients with expected long surgical time.

Citation: Yang Y, Wang F. Hidden blood loss in unilateral opendoor cervical laminoplasty for multilevel cervical spondylotic myelopathy. Jt Dis Relat Surg 2024;35(2):293-298. doi: 10.52312/ jdrs.2024.1439.

Ethics Committee Approval

The study protocol was approved by the The Third People’s Hospital of Chengdu Ethics Committee. The study was conducted in accordance with the principles of the Declaration of Helsinki.

Author Contributions

All authors contributed equally to the article. All authors approved the final manuscript and agree to be accountable for all aspects of the work.

Conflict of Interest

The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.

Financial Disclosure

The authors received no financial support for the research and/or authorship of this article.

Data Sharing Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.