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Fulltext Application of a novel nested ensemble algorithm in predicting motor function recovery in patients with traumatic cervical spinal cord injury

Wang Y, Zhang J, Yuan J, Li Q, Zhang S, Wang C, et al.

Sci Rep, 2024 Jul 29;14(1):17403.
PMID: 39075134 DOI: 10.1038/s41598-024-65755-1

Traumatic cervical spinal cord injury (TCSCI) often causes varying degrees of motor dysfunction, common assessed by the International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI), in association with the American Spinal Injury Association (ASIA) Impairment Scale. Accurate prediction of motor function recovery is extremely important for formulating effective diagnosis, therapeutic and rehabilitation programs. The aim of this study is to investigate the validity of a novel nested ensemble algorithm that uses the very early ASIA motor score (AMS) of ISNCSCI examination to predict motor function recovery 6 months after injury in TCSCI patients. This retrospective study included complete data of 315 TCSCI patients. The dataset consisting of the first AMS at ≤ 24 h post-injury and follow-up AMS at 6 months post-injury was divided into a training set (80%) and a test set (20%). The nested ensemble algorithm was established in a two-stage manner. Support Vector Classification (SVC), Adaboost, Weak-learner and Dummy were used in the first stage, and Adaboost was selected as second-stage model. The prediction results of the first stage models were uploaded into second-stage model to obtain the final prediction results. The model performance was evaluated using precision, recall, accuracy, F1 score, and confusion matrix. The nested ensemble algorithm was applied to predict motor function recovery of TCSCI, achieving an accuracy of 80.6%, a F1 score of 80.6%, and balancing sensitivity and specificity. The confusion matrix showed few false-negative rate, which has crucial practical implications for prognostic prediction of TCSCI. This novel nested ensemble algorithm, simply based on very early AMS, provides a useful tool for predicting motor function recovery 6 months after TCSCI, which is graded in gradients that progressively improve the accuracy and reliability of the prediction, demonstrating a strong potential of ensemble learning to personalize and optimize the rehabilitation and care of TCSCI patients.

Matched MeSH terms: Cervical Cord/injuries; Cervical Cord/physiopathology
Rare morbidity of permanent quadriplegia caused by neurenteric cyst of the cervical cord

Tan Chor Lip H, Jih Huei T, Chong Abdullah A, Rahman NABA

Avicenna J Med, 2019 5 31;9(2):78-81.
PMID: 31143701 DOI: 10.4103/ajm.AJM_153_18

The incidence of neurenteric cyst (NC) is rare, accounting for 0.3%-1.3% of all spine tumors. The occurrence of quadriplegia caused by NC is even scarcer. Herein we report on a young girl with a rare NC over the C2-C5 spinal cord, which led to the morbidity of permanent quadriplegia despite early surgical intervention. This case highlights the rare morbidity of cervical cord NC presenting with permanent quadriplegia that failed to respond despite early surgical excision.

Matched MeSH terms: Cervical Cord
Fulltext Pulmonary rehabilitation using mechanical insufflation-exsufflation therapy for spinal cord injury – two case studies in the University Malaya Medical Centre

Tan, J.H., Aishah A. Fauzi, Hasnan, N.

JUMMEC, 2017;20(2):31-33.
MyJurnal

There is a high incidence of 36% to 83% of respiratory dysfunction in patients with acute cervical spinal cord
injury. Complications arising from respiratory dysfunction remain one of the most common causes of morbidity
and mortality in the spinal cord injured population. Specialized pulmonary care and therapy can help individuals
with tetraplegia to maintain a stable respiratory status allowing active participation in active rehabilitation.
This would allow them to achieve rehabilitation goals of independent function and community reintegration.
Mechanical insufflation-exsufflation (MIE) therapy is an option for secretion management in individuals with
acute spinal cord injury. In this paper, we present our experience using MIE as an adjunct to management of
secretions in the spinal cord injured population at the University of Malaya Medical Centre.

Matched MeSH terms: Cervical Cord
Fulltext Upper Limb Reconstruction in Tetraplegic Patients: A Primer for Spinal Cord Injury Specialists

Liew SK, Shim BJ, Gong HS

Korean J Neurotrauma, 2020 Oct;16(2):126-137.
PMID: 33163420 DOI: 10.13004/kjnt.2020.16.e48

Cervical spinal cord injury (SCI) often causes debilitating loss of function of the upper limb. Upper extremity reconstruction surgery can restore some of the upper limb function in tetraplegic patients with SCI. The procedures are typically muscle-tendon unit transfer surgeries, which redistribute the remaining functional muscles to restore active elbow extension, key grip, and finger grasping. In addition to the tendon transfer surgeries, nerve transfers have emerged recently and are showing promising results. However, despite more than half of the tetraplegic patients can benefit from upper limb surgery, only a few of them receive the procedures. This missed opportunity may be due to the lack of communication between SCI specialists and hand surgeons, or the lack of awareness of such options among the specialists and patients. In this review, we provide a basic overview of upper limb reconstruction in tetraplegic patients with target audience of SCI specialists for their better understanding of the basic concept of surgery and information for patient consultation before referring to hand surgeons.

Matched MeSH terms: Cervical Cord
Fulltext White cord syndrome: A devastating complication of spinal decompression surgery

Vinodh VP, Rajapathy SK, Sellamuthu P, Kandasamy R

Surg Neurol Int, 2018;9:136.
PMID: 30090668 DOI: 10.4103/sni.sni_96_18

Background: Reperfusion injury of the spinal cord or "white cord syndrome" refers to the sudden onset of neurological deterioration after spinal decompressive surgery. Associated magnetic resonance (MR) findings only include focal hyperintensity on T2-weighted images without any other pathological changes.
Case Description: A patient with cervical stenosis secondary to metastatic tumor in the intradural and extradural compartments presented with lower limb paraparesis. She underwent an uneventful tumor excision accompanied by posterior cervical decompression and fusion. Postoperatively, she was quadriplegic and required ventilator support. The emergent postoperative MR scan revealed focal hyperintensity on the T2-weighted image consistent with spinal cord edema extending into the lower brain stem.
Conclusion: Very few cases of reperfusion injury of the cervical spinal cord or "white cord syndrome" are described in the literature. Here we present a patient who, following cervical laminectomy and fusion for excision of metastatic tumor, developed quadriplegia. Notably, postoperative MR showed only findings of upper cervical cord and lower brain stem edema consistent with a "white cord syndrome" without other compressive pathology.

Matched MeSH terms: Cervical Cord