scholarly journals Relationship Between Insertion Torque, and Pullout Strength Depending on the Size of the Pilot Hole and Biodegradable Suture Anchor in Osteoporotic Humeral Head

2012 ◽  
Vol 15 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Yong Min Chun ◽  
Young Han Lee ◽  
Sung Hwan Kim ◽  
Yoo Jung Park ◽  
Sung Jae Kim
Keyword(s):  
Humeral Head ◽  
Suture Anchor ◽  
Region Of Interest ◽  
Insertion Torque ◽  
Pullout Strength ◽  
Mineral Density ◽  
Pilot Hole ◽  
Significant Difference ◽  
Group A ◽  
The Difference

PURPOSE: The object of this study was to investigate the difference in torque and pullout strength between the standard anchor insertion (5.0 mm) with a small awl (3.7 mm) and larger anchor insertion (6.5 mm), with a standard awl (5.0 mm) in osteoporotic humeral head.MATERIALS AND METHODS: The embalmed 24 paired cadaveric shoulders were assigned to either Group A or B. After measuring the bone mineral density (BMD) of the ROI (region of interest) in the humeral head, 5.0 mm suture anchors were inserted using a 3.7 mm awl in Group A1, and the same 5.0 mm anchors were inserted using a 5.0 mm awl in Group A2. The 5.0 mm anchors were inserted using a 5.0 mm awl in Group B1, and 6.5 mm anchors were inserted using a 5.0 mm awl in Group B2. We measured the torques at the time of the anchor insertion and pullout strengths.RESULTS: There was no significant difference in the BMD between the groups. The torque of A1 (20.6 cN.m) was significantly higher than that of A2 (13.2 cN.m), and the torque of B2 (20.8 cN.m) was significantly higher than that of B1(12.1 cN.m). However, the difference in the increased torque between group A and B was not significant. The pullout strength of A1 (204.2 N) was significantly higher than that of A2 (152.9 N), and the pullout strength of B2 (210.9 N) was significantly higher than that of B1 (149.5 N). However, the difference in the increased pullout strength between Group A and B was not significant.CONCLUSION: In severe osteoporosis, the use of a larger suture anchor with a standard awl increased the torque and pullout strength significantly, in comparison to the use of the same sized suture anchor and awl. If there is an inadequate interval between the anchors on the greater tuberosity, the use of a 3.7 mm awl and 5.0 mm anchor will be beneficial compared to that of a 5.0 mm awl and 6.5 mm anchor, considering that an increase in the pullout strength does not depend on the awl size.

Does body position, age, and heart rate induce IOP’s changes?

2021 ◽  
pp. 112067212110233
Author(s):  
Marcelina Sobczak ◽  
Magdalena Asejczyk ◽  
Malwina Geniusz
Keyword(s):  
Heart Rate ◽  
Body Position ◽  
Age Groups ◽  
Cardiovascular Parameters ◽  
Entire Cohort ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Group B ◽  
Effect Of Age

Objectives: The main goal of this research was to determine the differences between the values of intraocular pressure (IOP) in the supine and sitting positions, and to assess the effect of age and cardiovascular parameters. Methods: Seventy-two healthy adults were enrolled and classified into age groups: 20–30 years (group A), 31–40 years (group B), and 41–71 years (group C). Corneal biometry and cardiovascular parameters, such as heart rate (HR), were measured. IOP measurements were taken in the sitting position (IOPS) and in the supine position (IOPL) using the iCare® Pro tonometer. Results: A significant difference between the IOPS and IOPL in the entire cohort was found ( p < 0.001). Regarding the age subgroups, a significant difference ( p < 0.001) between the IOPS and IOPL was obtained in group A (2.6 ± 1.6 mmHg) and group C (1.5 ± 1.3 mmHg). There were no significant differences in the IOPS between groups. The highest IOP values were obtained for group A. The correlations between HR and IOPS are statistically significant for group A and group B, and for HR and IOPL-S for group B only. Multivariate analysis showed that HR has a significant influence on the difference in IOP in the two body positions. Conclusion: A statistically significant difference between the effect of age and the values of IOPS and IOPL was shown. Cardiovascular parameters showed some relevant statistical dependencies, but with a rather marginal significance in young people. The influence of body position for the measurement of IOP for healthy subjects does not seem to matter, despite the fact that there are some dependencies that are statistically significant.

The Influence of Trabecular Microstructure on Mechanical Properties and the Pullout Strength of Suture Anchors

2010 ◽  
Author(s):  
Mariya Poukalova ◽  
Christopher M. Yakacki ◽  
Robert E. Guldberg ◽  
Angela Lin ◽  
Ken Gall
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Suture Anchor ◽  
Common Type ◽  
Tissue Fixation ◽  
Suture Anchors ◽  
Pullout Strength ◽  
Mineral Density ◽  
Trabecular Microstructure ◽  
Type Of Surgery

Suture anchors provide soft-tissue fixation, often tendons and ligaments, to bone. The most common type of surgery in which suture anchors are used is in rotator cuff repairs, where the anchor is implanted into the humerus to create a point of fixation for the supraspinatus.[1–2] Pullout strength, or the force necessary to pull the anchor from the bone, has been previously used as a metric to compare suture anchor performance. In investigating suture anchor performance, it has been suggested that pullout strength is positively correlated to bone mineral density (BMD).[2]

Utility of T2 mapping in the staging of thyroid-associated ophthalmopathy: efficiency of region of interest selection methods

2020 ◽  
Vol 61 (11) ◽  
pp. 1512-1519 ◽  
Author(s):  
Wen Chen ◽  
Hao Hu ◽  
Huan-Huan Chen ◽  
Guo-Yi Su ◽  
Tao Yang ◽  
...  
Keyword(s):  
T2 Mapping ◽  
Region Of Interest ◽  
Roc Curves ◽  
Rank Test ◽  
Selection Methods ◽  
Measuring Time ◽  
Significant Difference ◽  
Thyroid Associated Ophthalmopathy ◽  
Signed Rank Test ◽  
The Difference

Background Discriminating the stage of thyroid-associated ophthalmopathy (TAO) is crucial for the treatment strategy and prognosis prediction. Utility of conventional magnetic resonance imaging in the disease staging is limited. Purpose To investigate the performance of T2 mapping based on different region of interest (ROI) selection methods in the staging of TAO. Material and Methods Thirty-two patients with TAO were retrospectively enrolled. Two radiologists independently measured the T2 relaxation time (T2RT) of extraocular muscles using two different ROIs (hotspot [ROIHS]: T2RT-hot; single-slice [ROISS]: T2RT-mean, T2RT-max, T2RT-min). Independent-samples t test, Wilcoxon signed rank test, Spearman correlation analysis, receiver operating characteristic (ROC) curves analyses, multiple ROC comparisons, and intra-class correlation coefficient (ICC) were used for statistical analyses. Results No significant difference was found in the measuring time between ROIHS and ROISS methods ( P = 0.066). T2RT-mean demonstrated the highest ICC for measurement, followed by T2RT-max and T2RT-min, and T2RT-hot showed the poorest reproducibility. Active TAOs showed significantly higher values for all the T2RTs than inactive mimics (all P < 0.001). Significant positive correlations were found between T2RTs and CAS (all P < 0.005). T2RT-hot and T2RT-max showed significantly higher areas under the curve than that of T2RT-mean ( P = 0.013 and 0.024, respectively), while the difference between T2RT-hot and T2RT-max was not significant ( P = 0.970). Conclusion The T2RTs derived from both ROI selection methods could be useful for the staging of TAO. The results of measuring time, reproducibility, and diagnostic performance suggest that T2RT-max would be the optimal indicator for staging.

scholarly journals Radiographic Outcomes in Treatment of Thumb Basal Joint Arthritis: Does Interposition of Acellular Dermal Allograft Prevent Metacarpal Settling?

2019 ◽  
Vol 12 (03) ◽  
pp. 177-182
Author(s):  
Sonya Khurana ◽  
Kevin K. Chen ◽  
Jeffrey J. Brooks
Keyword(s):  
Demographic Data ◽  
Joint Space ◽  
Dermal Matrix ◽  
Radiographic Outcomes ◽  
Significant Difference ◽  
Basal Joint ◽  
Group A ◽  
The Difference ◽  
Joint Arthritis ◽  
Acellular Dermal

Abstract Background Osteoarthritis at the thumb carpometacarpal joint can have a profound impact on quality of life. Here, we evaluate radiographic outcomes in patients who have had open complete trapeziectomy, ligament reconstruction with tendon interposition, and acellular dermal matrix (GraftJacket) interposition—Group A, and compare them with those without GraftJacket interposition—Group B. Materials and Methods Thirty patients who had undergone operative treatment for thumb basal joint arthritis by a single surgeon from 2009 to 2016 were identified, and charts were retrospectively reviewed for demographic data, surgical and radiographic outcomes, and complications. Results There was no significant difference in pre- and postoperative radial abduction or pre- and postoperative palmar abduction. The difference in intraoperative joint space was significant (p = 0.006), but the difference in postoperative joint space was not (p = 0.310). The average amount of metacarpal settling was 6.9 versus 3.7 mm (p = 0.035) (Groups A and B, respectively). Three patients in Group A developed an inflammatory reaction to the GraftJacket, and one required reoperation for allograft removal. Conclusion This study suggests that thumb basal joint arthroplasty with GraftJacket interposition does not lead to more favorable radiographic outcomes at long-term follow-up. The increased costs associated with GraftJacket use may not be justified in light of these outcomes.

A Sham-Controlled Trial of Acupuncture as An Adjunct in Migraine Prophylaxis

2014 ◽  
Vol 32 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Mohsen Foroughipour ◽  
Amir Reza Golchian ◽  
Mohsen Kalhor ◽  
Saeed Akhlaghi ◽  
Mohammad Taghi Farzadfard ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Sham Acupuncture ◽  
Migraine Prophylaxis ◽  
Acupuncture Group ◽  
Migraine Headaches ◽  
Prophylactic Drugs ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Sham Acupuncture Group

Background Migraine is one of the most common types of headache, with significant socioeconomic effects. Prophylactic drugs are used to prevent migraine headaches but are unpromising. Objective To assess the effects of adding acupuncture to conventional migraine prophylaxis. Methods One hundred patients with migraine (41 male, 59 female), in whom prophylactic drugs had not produced a fall of at least 50% in the number of attacks, entered the study. The patients were randomised into two groups, sham and true acupuncture. The patients in both groups continued their prophylactic treatment and received 12 sessions of either true or sham acupuncture. Each session was 30 min and was repeated three times a week. The number of headaches in the two groups was compared at baseline, and at the end of four successive months. Results There was no significant difference in the frequency of attacks between the two groups before intervention. After 1 month, the frequency of attacks each month decreased from 5.1 (0.8) to 3.4 (1.2) in the true acupuncture group, and from 5.0 (0.8) to 4.4 (1.1) in the sham acupuncture group (a significant difference, p<0.001). The frequency continued to decrease in month 2 but increased in months 3 and 4; however, it was still significantly lower than baseline, and the difference remained significant after month 4. Conclusions Acupuncture is applicable as an adjunct to prophylactic drugs in migraineurs in whom the number of attacks does not fall with prophylactic medication.

Liver Status in a Cohort of Polytransfused B-Thalassemia Major (BTM) on Long Term Desferrioxamine (DfO) or Deferiprone (L1).

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 3732-3732 ◽  
Author(s):  
Mohsen Saleh Elalfy ◽  
Iman Abdin
Keyword(s):  
Thalassemia Major ◽  
Iron Chelators ◽  
Main Body ◽  
Liver Iron ◽  
Iron Storage ◽  
Liver Iron Content ◽  
Significant Difference ◽  
Group A ◽  
Insignificant Difference ◽  
The Difference

Abstract The liver is the main body site for iron storage. Iron chelators as DFo and L1 had problems of compliance and intolerance respectively. This prospective study enrolled 76 BTM patients aged from 9–33 years, mean of 14±4.4 to evaluate the effectiveness of both chelators judged by serum ferritin (sf) and liver iron content (LIC) using repeated liver biopsies. Fifty patients were on DFo 35 mg/kg/day 5 days per week and twenty-six were on L1 75 mg/kg/day on daily bases. Mean baseline sf values were 3678±1922 and 3573±1879 ng/ml while mean baseline LIC was 19.2±7.9 and 18.9±8.1 mg fe/g dw, while 12% and 14% showed evidence of liver fibrosis (score ≥ 3) respectively. Twenty-four months later; a decline in sf by 287±837 in Dfo (In Dfo compliant group [number = 30]who had received ≥ 75% of planned dose; sf dropped by 890±437 while increased in DFo non compliant by 621±513). While falling by 729±633 in L1 group. A decrease in LIC by 3.9±2.8 mg fe/g dw (−5.8±3.1 in Dfo compliant,+2.6±3.3 in Dfo non compliant) and falling by 2.2±3.4 mg fe/g dw in L1 group, the difference was statistically significant P< 0.05 between compliant and non compliant DFo and insignificant difference between Dfo and L1.The mean iron excretion: intake was 1.61,0.86 and 1.48 in Dfo compliant, non compliant and L1 respectively. A positive correlation was found between sf and LIC in both groups. Fibrosis was improved in Dfo compliant group better than L1 but no statistically significant difference was observed, while progressive fibrosis in 10% of Dfo non compliant group. All Dfo compliant group completed study, 18 out of 20 Dfo non compliant while six L1 patients discontinued the drug prematurely (3 severe gastrointestinal disturbances, 2 severe arthralgia and one repeated neutropenia). Conclusion: Both Dfo and L1 are effective iron chelators evident by drop in sf, LIC and improved fibrosis, however compliance and intolerance are still troublesome.

scholarly journals Clinical Effect of Suture Anchor and Double-Pulley Technique in the Treatment of Inferior Patellar Fracture

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Hang Yu ◽  
Hui Dong ◽  
Binjia Ruan ◽  
Xiaohang Xu ◽  
Yongxiang Wang ◽  
...  
Keyword(s):  
Fracture Healing ◽  
Suture Anchor ◽  
Alternative Therapy ◽  
Operation Time ◽  
Healing Time ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Clinical Healing

Objective. To evaluate the efficacy of suture anchor combined with double-pulley technique for subpatellar comminuted fractures compared with wire vertical suture and Krachow in the treatment of subpatellar fractures. Methods. Retrospectively selected 48 patients with subpatellar pole comminuted fracture admitted in our hospital from February 2013 to July 2019, 25 patients with double-pulley technique (group A), and 23 patients with vertical wire suture with Krachow suture. Patient age, gender, AT/OTA typing, injury mechanism, follow-up time, surgical time, bleeding volume, mean fracture healing time, and postoperative complications were recorded. The Insall-Salvati index immediately and 6 weeks after surgery. Bostman scores and knee activity were recorded at each follow-up, and month 12 was taken as the final result. Results. Time of surgery in group A (46.52 min) was significantly shorter than in group B (76.30 min). Intraoperative bleeding in group 15.1 ml, B, group 15.9 ml. Both incisions healed in stage I, averaging clinical healing of patella fracture within 10 weeks. There was no significant difference in mean Bostman score and knee activity at month 12 (group A: 28.4, 124.8°; group B: 28.1, 125.7°). There was no significant statistical difference in the Insall-Salvati index immediately or 6 weeks between the two groups. Group B patients had two wire fractures, fracture healing and the wire removed one year after surgery, and the remaining patients had no complications such as internal fixation loosening, fracture, delayed healing, or nonhealing of fracture. Conclusion. Compared with the treatment of subpatellar fracture with wire vertical suture and Krachow method, suture anchor with double-pulley technique has short operation time, reliable fixation, and less complications. Patients can have early functional exercise and good knee function recovery without secondary surgery. It can be considered as an alternative therapy for this fracture and deserves clinical adoption and promotion.

scholarly journals Postoperative Sore Throat, Nausea and Vomiting in Routine Nasal Surgery: Influence of Pharyngeal Packing

2012 ◽  
Vol 1 (1) ◽  
pp. 24-28
Author(s):  
Mehrdad Naderian ◽  
Ehsan Jangholi ◽  
Taraneh Kharaz Tavakol
Keyword(s):  
Sore Throat ◽  
Postoperative Nausea And Vomiting ◽  
Nausea And Vomiting ◽  
Control Group ◽  
Nasal Surgery ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Group B ◽  
Pharyngeal Packing

Introduction: Pharyngeal packs are commonly used to prevent of postoperative nausea and vomiting (PONV) and Sore throat during nasal surgery following tracheal intubation. the aim of this study is evaluation of effectiveness of pharyngeal packing in the prevention of PONV. Materials and methods: This study with random sampling performed on 120 adult patients scheduled for routine nasal surgery referred Boo – Ali hospital in Tehran, Iran from March 2011 to March 2012. the study was approved in the ethical committee of Azad University and written informed consent to participate in the study. All subjects randomly allocated to Group A or Group B to have and not to have pharyngeal packing during surgery, Respectively.The incidence of PONV and sore throat in the recovery room,at 2 and 6 h were recorded by a 100 mm long visual analogue scale (VAS). Data were analysed using non-parametric tests in SPSS 18. Significant difference was set at p<0.05. Results: The average age of patients was 27.6 ± 7.1 years. The average of age in Group A was 29.2 ± 2.8 years and in Group B was 27.4 ± 3.2 years. The difference in throat pain scores in the two groups at each assessment time was statistically significant. The difference in PONV scores were not statistically significant. Conclusion: The usage of pharyngeal packing during nasal surgery leads to decreased incidence of sore throat in experiment group compared with the control group. Also has no effect on the incidence of PONV. [GMJ. 2012;1(1):24-28]

scholarly journals The influence of balanced complex chromosomal rearrangements on preimplantation embryonic development potential and molecular karyotype

2020 ◽  
Author(s):  
Gang Li ◽  
Weiyi Shi ◽  
Wenbin Niu ◽  
Jiawei Xu ◽  
Yihong Guo ◽  
...  
Keyword(s):  
Embryonic Development ◽  
High Quality ◽  
Preimplantation Genetic Testing ◽  
Abnormal Embryo ◽  
Significant Difference ◽  
Molecular Karyotype ◽  
Group A ◽  
The Difference ◽  
Group B ◽  
Euploid Embryo

Abstract Background: Balanced complex chromosome rearrangements (BCCR) are balanced chromosomal structural aberrations that involve two or more chromosomes and at least three breakpoints. It is very rare in the population.The objective is to explore the difference of influence of three types of BCCR on early embryonic development and molecular karyotype.Results:Twelve couples were recruited including four couples of three-way rearrangements carriers (group A), three couples of double two-way translocations carriers (group B) and five couples of exceptional CCR carriers (group C). A total of 243 oocytes were retrievedin the seventeen preimplantation genetic testing (PGT) cycles, and 207 of these were available for fertilization.After intracytoplasmic sperm injection, 181oocytes normally fertilized. The rates of embryos forming on day3 in three groups were 87.88%, 97.78% and77.14%, which was significantly different (P=0.01). Compared with group B, the rate of embryo formation was statistically significantly lower in group C(P=0.01).Furthermore, the rates of high-quality blastocysts in three group were 14.71%, 48.15% and 62.96%, respectively, which was significantly different (P=0.00). Compared with group B andC, the rate of high-quality blastocysts in group A was statistically significantly lower (P=0.00;P=0.00). Comprehensive chromosome analysis was performed on 83 embryos, including 75 trophectodermcellsand 8 blastomeres. Except 7 embryos failed to amplify, 9.01%embryos were diagnosed as euploidy, and 90.91% were diagnosed as abnormal. As for group A, the euploid embryo rate was 10.71%and the abnormal embryo rate was 89.29%. In group B,the euploid embryo rate was 3.85%, the abnormal embryo rate was 96.15%. The euploid embryo rate was 13.04%, the abnormal embryo rate was 86.96% in group C.There were no significant differences among the three groups (P = 0.55).Conclusions:The lowest rate of high quality blastocysts has been for three-way rearrangements and the lowest rate of euploidy has been for double two-way translocations, although no significant difference. Different types of BCCR maybe have little effect on the embryonic molecular karyotype. The difference of influence of BCCR on early embryonic developmentandmolecular karyotypeshould be further studied.

Effect of pilot hole diameter and tapping on insertion torque and axial pullout strength of 4.0-mm cancellous bone screws

2011 ◽  
Vol 72 (12) ◽  
pp. 1660-1665 ◽  
Author(s):  
Kevin A. R. Kunkel ◽  
Jonathan T. Suber ◽  
Patrick D. Gerard ◽  
Michael P. Kowaleski
Keyword(s):  
Cancellous Bone ◽  
Hole Diameter ◽  
Bone Screws ◽  
Insertion Torque ◽  
Pullout Strength ◽  
Pilot Hole
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