Ultra-high-molecular-weight Polyethylene (UHMWPE) Wing Method for Strong Cranioplasty

We developed a new cranioplasty method that utilizes artificial bone made of ultra-high-molecular-weight polyethylene, with a wedge-shaped edge (UHMWPE Wing). This study shows the methods and data of case series and finite element analyses with the UHMWPE Wing. A circumferential wing was preoperatively designed for a custom-made artificial bone made of UHMWPE to achieve high fixed power and to minimize the usage of cranial implants. Here, we present 4 years of follow-up data and finite element analyses for patients treated with the UHMWPE Wing between February 2015 and February 2019. Eighteen consecutive patients underwent cranioplasty using our UHMWPE Wing design. There were no postoperative adverse events in 17 of the patients for at least 18 months. One case of hydrocephalus experienced screw loosening and graft uplift due to shunt malfunction. Placement of a ventriculo-peritoneal shunt immediately returned the artificial bone to normal position. Finite element analyses revealed that a model using the UHMWPE Wing had the highest withstand load and lowest deformation. This is the first report on the UHMWPE Wing method. This method may enable clinicians to minimize dead space and achieve high strength in cranioplasty.     

Reconstructive surgery for recurrent penile curvature

Purpose

There are surprisingly few reports about reconstructive surgery for severe recurrent/persistent penile curvature (redo-PC). We present our experience.

Methods

We reviewed 9 redo-PC cases we treated between 1998 and 2016.

Results

Cases 1–3 and 5 were identified from 111 consecutive hypospadias patients we treated between 1998 and 2016 (4/111; 3.6%). Cases 4 and 6–9 had initial surgery elsewhere. Initial PC was severe (>?45°; n?=?5), moderate (30°-45°; n?=?1), or unknown (n?=?3), treated by dorsal plication (DP) in 4/9 (cases 1–4), chordectomy in 2/9 (cases 5, 6), and unknown in 3/9 (cases 7–9); no case had tunica albuginea incision (TAI). Straightening after initial surgery was confirmed by artificial erection (AE) in 4/9, not confirmed (2/9), and unknown (3/9). Cases 1, 2, 7 and 8 had had previous failed redos. Scarring of buccal mucosa used for urethroplasty caused worse PC in cases 7 and 9. After TAI (n?=?6; cases 1, 3–6, and 8) or scar removal with DP (n?=?3; cases 2, 7, and 9), AE confirmed successful straightening in all cases, without sequelae after a mean follow-up of 2.6 years.

Conclusion

TAI was most effective for redo-PC surgery. Preoperative AE and examination under anesthesia should be used to customize treatment.

     

Successful management of living donor liver transplantation for biliary atresia with single ventricle physiology—from peri‐transplant through total cavopulmonary connection: A case report

Children with single ventricle physiology have complete mixing of the pulmonary and systemic circulations, requiring staged procedures to achieve a separation of these circulations, or Fontan circulation. The single ventricle physiology significantly increases the risk of mortality in children undergoing non‐cardiac surgery. As liver transplantation for patients with single ventricle physiology is particularly challenging, only a few reports have been published. We herein report a case of successful LDLTx for an 8‐month‐old pediatric patient with biliary atresia, heterotaxy, and complex heart disease of single ventricle physiology. The cardiac anomalies included total anomalous pulmonary venous return type IIb, intermediate atrioventricular septal defect, tricuspid regurgitation grade III, coarctation of aorta, interrupted inferior vena cava, bilateral superior vena cava, and polysplenia syndrome. Following LDLTx, the patient sequentially underwent total cavopulmonary shunt + Damus‐Kaye‐Stansel at 3 years of age and extracardiac total cavopulmonary connection (EC‐TCPC) completion at 5 years of age; 7 years have now passed since LDLTx (2 years post–EC‐TCPC). We describe the details of the management of LTx in the presence of cardiac anomalies and report the long‐term cardiac and liver function, from peri‐LDLTx through EC‐TCPC completion.     

Clinical outcomes of assisted reproductive technology treatment by using a self‐injection of recombinant human chorionic gonadotropin as the final maturation trigger

Purpose

To evaluate the efficacy and safety of self‐injections of the prefilled recombinant human chorionic gonadotropin (r‐hCG) in a syringe in assisted reproductive technology (ART) treatment for the maturation trigger (MT), as compared to self‐injections of conventional hCG and intranasal administration of gonadotropin‐releasing hormone agonist (GnRH‐a).

Methods

Between January and April, 2017, 396 patients who underwent oocyte retrieval were recruited. Of these, 396 patients were classified into three groups, according to the types of MT: (1) the urinary human chorionic gonadotropin (u‐hCG) group that consisted of patients who had a self‐injection of u‐hCG (n = 127); (2) the GnRH‐a group that received nasal administration of GnRH‐a (n = 159); and (3) the r‐hCG group that had a self‐injection of r‐hCG (n = 110). Several ART outcomes were evaluated.

Results

The mature oocyte retrieval rate was not different between the u‐hCG, r‐hCG, and GnRH‐a groups and the fertilization and cleavage rates were similar between the three groups. The clinical pregnancy rates did not significantly differ between the GnRH‐a group and the u‐hCG group; however, it was significantly lower in the GnRH‐a group, compared to the r‐hCG group. No difference was observed in the incidence of moderate or more severe ovarian hyperstimulation syndrome among the three groups.

Conclusion

The self‐injection of the prefilled r‐hCG is a favorable MT for ART patients.     

Alterations in the anterior chamber angle after implantation of iris-fixated phakic intraocular lenses

PURPOSE: To evaluate anterior chamber angle alterations after phakic intraocular lens (pIOL) implantation using the Pentacam rotating Scheimpflug camera (Oculus) and the effect on intraocular pressure (IOP) and anterior chamber inflammation. SETTING: Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan. METHODS: Twenty eyes of 11 patients with high myopia who had implantation of pIOLs (Artisan/Verisyse, model 204, Ophtec BV) were included. All pIOLs were fixated on the iris near the 3 o'clock and 9 o'clock positions. Angles at the 2, 3, 4, 8, 9, and 10 o'clock positions, IOP, and postoperative flare were evaluated retrospectively. RESULTS: The mean angle degree at 2, 3, 4, 8, 9, and 10 o'clock was 40.3 degrees +/- 3.3 (SD) preoperatively and 36.5 +/- 5.8 degrees postoperatively; the postoperative angles were significantly narrower than the preoperative angles (P<.001). The mean angles at 3 o'clock and 9 o'clock were 39.8 +/- 3.7 degrees and 40.6 +/- 3.5 degrees, respectively, preoperatively and 32.7 +/- 6.0 degrees and 31.3 +/- 5.4 degrees, respectively, postoperatively. The postoperative angles at 3 o'clock and 9 o'clock were narrower than the preoperative angles (P<.001). There was no significant difference between preoperative IOP and postoperative IOP (P = .22). The flare at 1 month (r = 0.573, P = .0071) and 1 year (r = 0.700, P = .004) was significantly correlated with the angle change. CONCLUSION: Partial localized narrowing of anterior chamber angles that occurred after pIOL implantation induced acute and chronic anterior chamber inflammation in patients with large angle alterations.     

Utility values in Japanese patients with exudative age-related macular degeneration

Purpose  

To investigate the utility values associated with visual loss due to age-related macular degeneration (AMD) in Japanese patients.     

Inhibition of the proliferation of human periodontal ligament fibroblasts by hyaluronidase

Hyaluronan (HA) exists in various living tissues as one of the major matrix macromolecules, and is well known to play an integral role in cell differentiation and proliferation. The present study was conducted to elucidate whether or not the proliferation of periodontal ligament (PDL) cells are affected specifically by the degradation of HA by hyaluronidasze (HAase). Human PDL fibroblasts were isolated and cultured with and without 15-150U/ml bovine testicular HAase from 1 to 11 days after seeding. The cells were also cultured with anti-CD44 antibody of 2 microg/ml. For the control against the anti-CD44 antibody treatment, 2 microg/ml IgG was used. The HA-dependent pericellular matrix was visualized by particle-exclusion assay. The number of cells was counted by MTT assay during the proliferation. The mRNA levels of HA synthases (HASs), HAases (HYALs) and CD44s were examined by a quantitative real-time PCR analysis. The cell proliferation was inhibited by the treatment with HAase and anti-CD44 antibody in cultured PDL fibroblasts. HASs mRNAs were down-regulated, whereas HYALs mRNAs were up-regulated significantly by the treatment with HAase and anti-CD44 antibody. The CD44s mRNA level exhibited no significant changes. These results suggest that HA may contribute to modulate the proliferation of cultured human PDL cells through a CD44-mediated mechanism.