Background: To elucidate the differences in mechanical performance between a novel axially controlled compression spinal rod (ACCSR) for lumbar spondylolysis (LS) and the common spinal rod (CSR). Methods: A total of 36 ACCSRs and 36 CSRs from the same batch were used in this study, each with a diameter of 6.0 mm. Biomechanical tests were carried out on spinal rods for the ACCSR group and on pedicle screw-rod internal fixation systems for the CSR group. The spinal rod tests were conducted following the guidelines outlined in the American Society for Testing and Materials (ASTM) F 2193, while the pedicle screw-rod internal fixation system tests adhered to ASTM F 1798-97 standards. Results: The stiffness of ACCSR and CSR was 1559.15 ± 50.15 and 3788.86 ± 156.45 N/mm (P < .001). ACCSR’s yield load was 1345.73 (1297.90–1359.97) N, whereas CSR’s was 4046.83 (3805.8–4072.53) N (P = .002). ACCSR’s load in the 2.5 millionth cycle of the fatigue four-point bending test was 320 N. The axial gripping capacity of ACCSR and CSR was 1632.53 ± 165.64 and 1273.62 ± 205.63 N (P = .004). ACCSR’s torsional gripping capacity was 3.45 (3.23–3.47) Nm, while CSR’s was 3.27 (3.07–3.59) Nm (P = .654). The stiffness of the pedicle screws of the ACCSR and CSR group was 783.83 (775.67–798.94) and 773.14 (758.70–783.62) N/mm (P = .085). The yield loads on the pedicle screws of the ACCSR and CSR group was 1345.73 (1297.90–1359.97) and 4046.83 (3805.8–4072.53) N (P = .099). Conclusion: Although ACCSR exhibited lower yield load, stiffness, and fatigue resistance compared to CSR, it demonstrated significantly higher axial gripping capacity and met the stress requirement of the human isthmus. Consequently, ACCSR presents a promising alternative to CSR for LS remediation.

Rationale: Postoperative Candida albicans infections are exceedingly rare in urban populations, especially among patients on long-term immunosuppressive therapy. To date, there have been no reported cases of rheumatoid arthritis (RA) patients developing C albicans infections following spinal surgery. This report aims to highlight this rare occurrence and share insights on management strategies. Patient concerns: A 53-year-old Han Chinese male patient was admitted with severe pain in the right lower limb. He had a 3-year history of RA and was on continuous antirheumatic medication. The postoperative course was complicated by the development of a C albicans infection, which was confirmed after multiple diagnostic measures. Diagnoses: The patient was diagnosed with postoperative C albicans infection based on intraoperative sampling and laboratory confirmation 79 days after spinal surgery. Interventions: The patient underwent targeted antifungal therapy, including an 8-week intravenous course followed by a 3-month oral itraconazole regimen. Supportive measures included meticulous perioperative management, nutritional support, and physical rehabilitation. Outcomes: The infection was successfully controlled, leading to the complete resolution of symptoms. The patient achieved a clinical cure, demonstrating the efficacy of combined antifungal therapy and comprehensive perioperative care. Lessons: This case underscores the importance of vigilant perioperative management in RA patients, especially those with immunosuppression. Individualized treatment strategies, close monitoring of nutritional and functional status, and timely antifungal intervention are essential for preventing and managing such rare infections. Furthermore, a review of literature since 1980 has enhanced our understanding of risk factors, diagnosis, and treatment of postoperative C albicans infections, informing better clinical practice.