Tag: pubmed

Radiol Med. 2022 Jun 14. doi: 10.1007/s11547-022-01508-2. Online ahead of print.

ABSTRACT

PURPOSE: To evaluate efficacy and safety of radiofrequency ablation (RFA) and microwave ablation (MWA) in unresectable lung malignancies.

METHODS: Data regarding patients with primary and secondary lung tumors treated with RFA or MWA from 2008 to 2020 were reviewed retrospectively. Primary study objectives such as technical success, primary and secondary technique efficacy rates, local tumor progression (LTP) rate, LPT-free survival (LPTFS) and overall survival (OS) were assessed. Secondary study objectives were side effects and complications. RFA and MWA were compared using the Chi-square test for continuous variables. Kaplan-Meier curves were calculated for survival statistical analysis.

RESULTS: A total of 113 patients with primary or secondary lung tumor underwent 74 RFA (48%) and 81 MWA (52%). Technical success rate was 151/155 (97%); primary and secondary technique efficacy rates were 123/155 (79%) and 129/155 (83%), respectively. During the entire study follow-up, 32 cases experienced disease progression (20%), of which 18 underwent repeat ablation (12%), in 6 cases with success (4%). Residual unablated tumor happened in 4/155 cases (3%). LTP occurred in 28/155 cases (17%). The only factor associated with poorer LTP-FS was lesion diameter ≥ 30 mm (P < 0.05). One-, 3- and 5-years LTP-FS was 83%, 82%, 82%, respectively. One-, 3- and 5-years OS of the entire population was 87%, 74%, 73%, respectively. Minor and major complication rates were 53/155 (34%) and 29/155 (19%), respectively.

CONCLUSIONS: In conclusion, this study confirms the appropriateness of RFA and MWA for lung tumors treatment, in terms of safety and efficacy.

PMID:35701683 | DOI:10.1007/s11547-022-01508-2

Acta Odontol Latinoam. 2022 Apr 30;35(1):67-73. doi: 10.54589/aol.35/1/67.

ABSTRACT

The aim of this study was to determine color change after accelerated artificial ageing (AAA) of different composite cements that are used with veneers. Five cylindrical test specimens, 15 mm in diameter and 2 mm thick, were made from a single layer of each of the following: RelyX Veneer 3M ESPE (RX), Paracore White Coltene (PC), Solocem White Opaque Coltene (SO), Resin Duo Cement Densell (DC), Panavia V5 Paste Kuraray Noritake (PA) and Panavia F2.0 Kuraray Noritake (PF) (30 specimens altogether). The specimens were light cured following manufacturers’ instructions using a Coltolux LED (Coltene) unit. Initial color was determined using an Easyshade – Vita Zahnfabrik Spectrophotometer. Then, the specimens were subjected to AAA for two weeks (336 hours) with cycles of 4 hours of UV light at 60 °C and 4 hours of vapor condensation at 50 °C, successively, after which color was recorded again. Color change was determined for each specimen according to the differenceinshadeon the Vita scale before and after AAA. Results were analyzed using Kruskal Wallis test. Mean and standard deviation for each group were: RX 8.40 (1.52); PC 8.60 (3.13); SO 6.40 (3.51); DC 10.00 (0.00); PA 7.60 (3.29); PF 2.00 (0.00). The Kruskal Wallis test showed significant difference for material (p<0.05), and comparison of means showed difference between Panavia F2.0 and the other materials. A table providing equivalence between the Vita Classic and CIELAB scales was used to transfer the recorded colors to the CIELAB scale, and the color difference ΔE was calculated for each group, where ΔL, Δa and Δb are the differences in the L, a and b values before and after the AAA. The mean and standard deviation were analyzed statistically by the ANOVA test and Tukey’s test. Mean and standard deviation for each group were: RX 14.94 (2.02); PC 14.51 (4.02); SO 12.08 (4.53); DC 16.31 (0.00); PA 10.9 (3.38); PF 7.24 (0.00). The ANOVA test showed significantdifferenceformaterial (p<0.05). Tukey’s test showed two groups (PF-DC, RX, PA). Under the experimental conditions of this study, it can be concluded that accelerated ageing significantly affects the color stability of the resin based cements tested.

PMID:35700544 | DOI:10.54589/aol.35/1/67

Acta Odontol Latinoam. 2022 Apr 30;35(1):31-38. doi: 10.54589/aol.35/1/31.

ABSTRACT

The aim of this study was to test two low-level laser therapy protocols by evaluating pain control, swelling and trismus in the postoperative period of lower third molar surgeries. This was a randomized, double-blind, placebo-controlled, crossover trial. Patients presenting two symmetrically impacted mandibular third molars were included. One side was randomly assigned for LLLT applied immediately after surgery (T1) and then after 24 (T2) and 48 hours (T3) (Protocol A). The other side received LLLT applied immediately after surgery and placebo after 24 and 48 hours (Protocol B). LLLT was given by intraoral application (660nm, 5 J/cm2, 10 s, 20 mW, 4 points) followed by extraoral application (789 nm, 30 J/cm2, 20 s, 60 mW, 8 points). The placebo application was similar to that of the experimental side but with laser simulation. The primary outcomes were pain control, swelling and trismus intensity at T1, T2, T3 and 7 days after surgery (T4). Data were analyzedbyANOVArepeated measures and Wilcoxon test (p<.05). The final sample consisted of 21 patients (42 teeth). There were no statistical differences for pain level between protocols A and B over time (p= .909), although the amount of analgesic medication was lower with protocol A at T2 (p=.022). There were no differences in swelling (p=.958) or trismus (p=.837) between the protocols used over time. Both protocols performed similarly for pain control, swelling and trismus. Therefore, for practical reasons, a single laser application in the immediate postoperative period could be indicated for the management of postoperative discomfort in lower third molar surgery.

PMID:35700539 | DOI:10.54589/aol.35/1/31

Phys Chem Chem Phys. 2022 Jun 14. doi: 10.1039/d2cp01725c. Online ahead of print.

ABSTRACT

Every practical method to solve the Schrödinger equation for interacting many-particle systems introduces approximations. Such methods are therefore plagued by systematic errors. For computational chemistry, it is decisive to quantify the specific error for some system under consideration. Traditionally, the primary way for such an error assessment has been benchmarking data, usually taken from the literature. However, their transferability to a specific molecular system, and hence, the reliability of the traditional approach always remains uncertain to some degree. In this communication, we elaborate on the shortcomings of this traditional way of static benchmarking by exploiting statistical analyses using one of the largest quantum chemical benchmark sets available. We demonstrate the uncertainty of error estimates in the light of the choice of reference data selected for a benchmark study. To alleviate the issues with static benchmarks, we advocate to rely instead on a rolling and system-focused approach for rigorously quantifying the uncertainty of a quantum chemical result.

PMID:35700515 | DOI:10.1039/d2cp01725c

Med Sci Sports Exerc. 2022 Jun 11. doi: 10.1249/MSS.0000000000002971. Online ahead of print.

ABSTRACT

PURPOSE: The magnitude and location of hip contact force influences the local mechanical environment of the articular tissue, driving remodelling. We used a neuromusculoskeletal model to investigate hip contact force magnitudes and their regional loading patterns on the articular surfaces in those with femoroacetabular impingement (FAI) syndrome and controls during walking.

METHODS: An EMG-assisted neuromusculoskeletal model was used to estimate hip contact forces in eligible participants with FAI syndrome (n = 41) and controls (n = 24), walking at self-selected speed. Hip contact forces were used to determine the average and spread of regional loading for femoral and acetabular articular surfaces. Hip contact force magnitude and region of loading were compared between groups using statistical parametric mapping and independent t-tests, respectively (p < 0.05).

RESULTS: All the following report comparisons with controls. Those with FAI syndrome walked with lower magnitude hip contact forces (mean difference -0.7 N·BW-1, p < 0.001) during first and second halves of stance, and with lower anteroposterior, vertical and mediolateral contact force vector components. Participants with FAI syndrome also had less between-participant variation in average regional loading which was located more anteriorly (3.8°, p = 0.035) and laterally (2.2°, p = 0.01) on the acetabulum but more posteriorly (-4.8°, p = 0.01) on the femoral head. Participants with FAI syndrome had a smaller spread of regional loading across both the acetabulum (-1.9 mm, p = 0.049) and femoral head (1 mm, p < 0.001) during stance.

CONCLUSIONS: Compared with controls, participants with FAI syndrome walked with lower magnitude hip contact forces that were constrained to smaller regions on the acetabulum and femoral head. Differences in regional loading patterns might contribute to the mechanobiological processes driving cartilage maladaptation in those with FAI syndrome.

PMID:35700435 | DOI:10.1249/MSS.0000000000002971

Med Sci Sports Exerc. 2022 Jun 11. doi: 10.1249/MSS.0000000000002969. Online ahead of print.

ABSTRACT

PURPOSE: Greater articular cartilage T1ρ magnetic resonance imaging relaxation times indicate less proteoglycan density and are linked to posttraumatic osteoarthritis development following anterior cruciate ligament reconstruction (ACLR). While changes in T1ρ relaxation times are associated with gait biomechanics, it is unclear if excessive or insufficient knee joint loading is linked to greater T1ρ relaxation times 12 months post-ACLR. The purpose of this study was to compare external knee adduction (KAM) and flexion (KFM) moments in individuals after ACLR with high vs. low tibiofemoral T1ρ relaxation profiles and uninjured controls.

METHODS: Gait biomechanics were collected in 26 uninjured controls (50% females, age 22 ± 4 yrs., BMI 23.9 ± 2.8 kg/m2) and 26 individuals after ACLR (50% females, age 22 ± 4 yrs., BMI 24.2 ± 3.5 kg/m2) at 6 and 12 months post-ACLR. ACLR-T1ρHigh (n = 9) and ACLR-T1ρLow (n = 17) groups were created based on 12-month post-ACLR T1ρ relaxation times using a k-means cluster analysis. Functional analyses of variance were used to compare KAM and KFM.

RESULTS: ACLR-T1ρHigh exhibited lesser KAM than ACLR-T1ρLow and Uninjured Controls 6 months post-ACLR. ACLR-T1ρLow exhibited greater KAM than Uninjured Controls 6 and 12 months post-ACLR. KAM increased in ACLR-T1ρHigh and decreased in ACLR-T1ρLow between 6-12 months, both groups becoming more similar to Uninjured Controls. There were scant differences in KFM between ACLR-T1ρHigh and ACLR-T1ρLow 6 or 12 months post-ACLR, but both groups demonstrated lesser KFM compared to Uninjured Controls.

CONCLUSIONS: Associations between worse T1ρ profiles and increases in KAM may be driven by the normalization of KAM in individuals who initially exhibit insufficient KAM 6-months post-ACLR.

PMID:35700436 | DOI:10.1249/MSS.0000000000002969

Orthopedics. 2022 Jun 13:1-6. doi: 10.3928/01477447-20220608-01. Online ahead of print.

ABSTRACT

Manipulation under anesthesia (MUA) after total knee arthroplasty (TKA) frequently has been used as a first-line treatment to restore functional range of motion after unsuccessful physical therapy. Although there are studies reporting that MUA assisted in restoring range of motion, there is a paucity of literature on the influence of MUA on the risk of revision TKA. The goal of our study was to determine whether MUA was associated with an increase in the rate of revision TKA within 2 years of MUA. A total of 49,310 patients within a single institution who underwent primary TKA were identified from 1999 to 2019. Data were matched at a 1:3 ratio (TKA with and without MUA, respectively) based on age, sex, and body mass index. A matched comparison cohort was conducted, with the MUA cohort having 575 patients and the no MUA cohort having 1725 patients. A statistically significant increase in the rate of noninfectious etiology revision TKA was found in the MUA cohort (7.3%) compared with the no MUA cohort (4.9%; P=.034). The most common reason for revision TKA after MUA was persistent stiffness, including arthrofibrosis and ankylosis; however, aseptic loosening, ligamentous instability, and periprosthetic fracture were found to be responsible for 21.4% of revision TKA procedures. Although MUA is a commonly performed procedure for treating stiffness after primary TKA, the orthopedic surgeon should counsel patients on the association of increased rate of revision TKA after MUA, most commonly, persistent stiffness. [Orthopedics. 20XX;XX(X):xx-xx.].

PMID:35700432 | DOI:10.3928/01477447-20220608-01

J Pediatr Hematol Oncol. 2022 Jun 15. doi: 10.1097/MPH.0000000000002502. Online ahead of print.

ABSTRACT

The number of studies evaluating teicoplanin lock therapy in coagulase-negative staphylococcus-associated catheter infection in pediatric malignancies is limited. The aim of this study was to evaluate the efficacy of teicoplanin lock therapy in pediatric cancer cases. Twenty-two patients with coagulase-negative staphylococcus-associated totally implantable venous access device infection, who had undergone teicoplanin closure treatment, were included in the study. Demographic data, number of lock treatment days, and treatment success data were obtained from the medical files of the patients. Fourteen of the patients (63.6%) had acute lymphocytic leukemia, 3 (13.6%) had acute myelocytic leukemia, and 5 (22.7%) had solid cancer. The median neutrophil count was 240×103/μL (interquartile range: 0 to 1195×103/μL). Between patients with and without catheter removal, no statistically significant difference was found in terms of baseline C-reactive protein, absolute neutrophil count, and the day of starting systemic teicoplanin treatment (P>0.05). The overall port survival rate of teicoplanin lock therapy was 72.7%. Within an average of 4 days, negative cultures of 16 (72.7%) patients whose catheters had not been removed were obtained. In conclusion, we suggest that teicoplanin lock therapy is an effective and safe treatment for catheter-related infections, caused by methicillin-resistant coagulase-negative staphylococcus.

PMID:35700426 | DOI:10.1097/MPH.0000000000002502

J Pediatr Hematol Oncol. 2022 Jun 7. doi: 10.1097/MPH.0000000000002495. Online ahead of print.

ABSTRACT

BACKGROUND: Germ cell tumors (GCTs) may occur from the neonatal period to late adulthood, characterized by extensive clinical and pathologic heterogeneity. MicroRNAs are a family of small noncoding RNAs that regulate a wide array of biological processes including carcinogenesis. MicroRNAs may be used for many purposes in clinical diagnostics. Numerous studies have proven the diagnostic value of microRNA371-373 and microRNA302/367 expression in malignant GCT. The diagnostic value of microRNA375 is disputable, because while its value is confirmed by some research data, there are still others denying it.

METHODS: The results of our own research on the relative expression of 10 microRNAs, including microRNA375, associated with GCT in the tumor tissues of 84 children and adolescents are presented.

RESULTS: In our research, overexpression of microRNA 371-373, 302/367 detected in the group of malignant GCT subtypes. Statistically significant expression of microRNA375 have been defined not only in the group of malignant GCT subtypes, but also in the group of immature teratomas. Among malignant GCTs, high expression of microRNA375 is specific for yolk sac tumors. In the group of seminomas, embryonic carcinomas, and mature teratomas expression of microRNA375 was observed imperceptible, even so the results were statistically insignificant.

CONCLUSION: Expression of microRNA 371-373, 302/367 is representative of malignant GCT subtypes. Statistically significant and high expression of microRNA375 attributable for yolk sac tumors and immature teratomas.

PMID:35700382 | DOI:10.1097/MPH.0000000000002495

Vopr Kurortol Fizioter Lech Fiz Kult. 2022;99(3):25-31. doi: 10.17116/kurort20229903125.

ABSTRACT

Epilepsy is a chronic disease characterized by recurrent, mostly unprovoked seizures with impaired motor, autonomic, mental or mental functions that occur as a result of excessive neuronal discharges in the gray matter of the cerebral cortex. The problem of the activity of medical rehabilitation for epilepsy in the professional community remains debatable, despite the obviousness of the arguments and judgments presented.

PURPOSE OF THE STUDY: Development of an effective and safe complex for the rehabilitation of young children with epilepsy, accompanied by impaired movement function.

MATERIAL AND METHODS: The study included 123 young children (from 9 to 24 months) with epilepsy accompanied by impaired motor function. By the method of simple randomization, all patients were divided into 4 groups: 3 main groups and a comparison group. All children of the study groups, except for the comparison group, received medical rehabilitation: in the 1st group – classical massage with the exception of the cervical-collar zone; in the 2nd group – kinesitherapy according to the method of V. Voigt; in the 3rd group – a complex effect, including classical massage with the exclusion of the neck-collar zone and kinesitherapy according to the method of V. Voigt. Children of the comparison group received basic therapy. The effectiveness of medical rehabilitation was analyzed using the Gross motor function classification system (GMFCS) and the Griffiths intellectual development scale.

RESULTS: Differences in GMFCS scores before and after medical rehabilitation were statistically significant in group 3. In patients with impaired movement function and suffering from epilepsy, the positive dynamics during complex rehabilitation was more pronounced than when using one isolated technique.

CONCLUSION: Complexity in planning and prescribing a course of rehabilitation determines the greatest efficiency in reducing the deficit of physical activity. With an increase in the index of epileptiform activity according to electroencephalography data without any clinical manifestations, it is not required to cancel rehabilitation measures, it is necessary to strengthen control over the patient.

PMID:35700373 | DOI:10.17116/kurort20229903125