ObjectiveTo investigate the influencing factors for special position maintenance in patients after pars plana vitrectomy (PPV) combined with silicon oil tamponade, and to establish a nomogram model. MethodsA total of 463 patients with complex retinal detachment were selected as the research subjects, and they were divided into modeling group (324 cases) or validation group (139 cases) according to enrollment time. Time to special position maintenance of patients was recorded, and maintenance time＜12 hours was determined as poor special position maintenance, whereas maintenance time≥12 hours was determined as favorable special position maintenance. The general data of patients were collected, and the Self-Rating Anxiety Scale (SAS), Visual Analogue Scale (VAS), Optimistic Intelligence Quotient Questionnaire (OQ-Q), and special position knowledge, attitude, and performance questionnaire were used for evaluation. The influencing factors for special position maintenance in patients of the modeling group were analyzed by using the multivariate Logistic regression model. A nomogram model was established based on the influencing factors, and then performance of the model was evaluated. ResultsEducational level, preoperative OQ-Q score, postoperative SAS score, use of postural AIDS, preoperative knowledge, attitude, and performance questionnaire score of special position, and postoperative VAS score for chest distress and pain were the influencing factors for special position maintenance in patients after PPV combined with silicon oil tamponade (P＜0.05). Areas under the receiver operating characteristic curve of the nomogram model established based on the aforementioned influencing factors were 0.827-0.835, exerting favorable evaluation accuracy and clinical effect. ConclusionEducational level, preoperative OQ-Q score, postoperative SAS score, use of postural AIDS, preoperative knowledge, attitude, and performance questionnaire score of special position, and postoperative VAS score for chest distress and pain can affect special position maintenance in patients after PPV combined with silicon oil tamponade. The nomogram model established based on the aforementioned influencing factors exerts relatively high accuracy, exerting favorable evaluation performance and values of clinical application.

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