Three‐dimensional printing enhances preparation for repair of double outlet right ventricular surgery

Objective

To assess the clinical value of three‐dimensional (3D) printing technology for treatment strategies for complex double outlet right ventricle (DORV).

Methods

Twenty‐five patients with complex double outlet right ventricle were enrolled in this study. The patients were divided into two groups: 3D printing group (eight patients) and a non‐3‐D printing control group (17 patients). The cardiac images of patients in the 3D printing group were transformed to Digital Imaging and Communications and were segmented and reconstructed to create a heart model. No cardiac models were created in the control group. A Pearson coefficient analysis was used to assess the correlation between measurements of 3D printed models and computed tomography angiography (CTA) data. Pre‐operative assessment and planning were performed with 3D printed models, and then operative time and recovery time were compared between the two groups.

Results

There was good correlation (r = 0.977) between 3D printed models and CTA data. Patients in the 3D printing group had shorter aortic cross‐clamp time (102.88 vs 127.76 min, P = 0.094) and cardiopulmonary bypass time (151.63 vs 184.24 min; P = 0.152) than patients in the control group. Patients with 3D printed models had significantly lower mechanical ventilation time (56.43 vs 96.76 h, P = 0.040) and significantly shorter intensive care unit time (99.04 vs 166.94 h, P = 0.008) than patients in the control group.

Conclusions

3D printed models can accurately demonstrate anatomic structures and are useful for pre‐operative treatment strategies in DORV.     

胸腺瘤的CT观察

５２例经病理学证实的胸腺瘤ＣＴ资料表明，胸腺瘤主要以直接延伸的方式生长，部分胸腺瘤可由近及远地侵犯纵隔诸间隙或（和）类似胸膜间皮瘤一样沿胸膜、心包呈侵袭性生长，只有极少的胸腺瘤可经血行或淋巴途径向远处转移，据此，我们将胸腺瘤分为局限性胸腺瘤与非局限性胸腺瘤两类，这种分类反映了胸腺瘤生长延伸的生物学特性，诊断标准易于掌握，对指导治疗方针的制订及预后的估计有重要的参考作用。     

颈椎保健理疗仪的研制

本文介绍了一种适合治疗各种类型颈椎病的颈椎保健理疗仪。它是由颈椎按摩装置、热疗装置和颈椎牵引装置构成。治疗颈椎病时,先利用颈椎按摩、热疗装置对颈部进行揉捏推拿、振动按摩、热疗;然后利用牵引装置对椎间小关节紊乱、椎间隙狭窄（椎间盘病变）等疾病进行牵引治疗。