Ulnar Length Research Articles

Ulna Length in Black Children

Ulna Length in Black Children

In idiopathic cubital tunnel syndrome, ulnar nerve excursion and instability can be reduced by repairing Osborne's ligament after simple decompression.

Osborne's modified decompression involves repairing Osborne's ligament beneath the ulnar nerve after simple decompression for idiopathic cubital tunnel syndrome. In this retrospective interrupted time series, 31 patients underwent modified simple decompression and 20 patients underwent conventional simple decompression. In the modified simple decompression group, the ulnar nerve length was measured at operation in full elbow flexion and extension before and after repair of Osborne's ligament. Ulnar nerve instability during elbow motion was measured using ultrasonography before operation and at 12 months after operation. In patients treated by modified simple decompression, the ulnar nerve length in full elbow flexion reduced significantly after repair of Osborne's ligament. At 12 months after surgery, the grade of ulnar nerve instability was lower in the modified simple decompression group than in the conventional simple decompression group. The clinical outcomes did not differ significantly between the groups at 24 months after operation. Level of evidence: III.

Is there a relationship between the lengths of the ipsilateral clavicle and the ulna? An anthropometric and statistical study

Aim: Mathematical relationships between bones in close proximity are useful for determining the proper length of comminuted or severely displaced bones during surgical reconstruction. This study examined the relationship between the lengths of the clavicle and ulna to develop a length propotion formula that can facilitate obtaining the proper length of the clavicle during surgery for displaced and comminuted fractures. Methods: The study enrolled 130 individuals (76 males, 54 females)who were healty for their upper extremities and was seen in our orthopedics outpatient clinic during April 2019 to June 2019. The right and left clavicles and ulnas of each individual were measured. All measurements were peformed by two of the authors in an blinded fashion. Results. Mean overall age was 32.2 years. There were significant correlations between the clavicle and ipsilateral ulnar lengths (p=0.001). However, there was a length difference between the right and left clavicles. The left clavicle was 9.00 ± 2.16 mm longer than the right in males and 7.13 ± 2.03 mm longer in females (p=0.001). There was no significant length difference between the right and left ulnas in either sex (0.84 ± 1.033 mm in males and 0.52 ± 0.818 mm in females). Conclusion. There is a significant ratio between the clavicle and ulna lengths on both the right and left sides in both sexes, but it isn’t the same for males and females. We propose that these length proportion formula can be used for determining the clavicle length for the surgical treatment of comminuted fractures with plates and particularly with nails.

Ulna: A tool to estimate stature

Identity is utmost important in both civil and criminal cases. In many cases, manmade disaster or natural disaster, accidental cases and homicidal cases forensic experts collect evidences to fix identity of an unknown dead body. Forensic expert job become very difficult when dis-membranous or mutilated body or only a bone or a bundle of bones brought for post-mortem examination. Stature is one of the key factor for fixing identity of an individual. Many study have been conducted to formulate regression formula from different long bones for different groups of race, ethnic and regions. This study aims at formulate a regression formula to estimate stature from percutaneous length of ulna of native of Gujarat. This study was carried out in Department of Forensic Medicine, C. U. Shah Medical College, Surendranagar, Gujarat. Total 800 participants (400 male & 400 Female) were included in study. Their stature and percutaneous length of ulna were estimated with standard methods and manner. Results are analysed and studied. This study shows that there is highly significant in mean length of ulna and stature in both male and female participants (P Keywords: Ulna length, Stature, Identification.

Estimation of stature by anatomical anthropometric parameters in first-year regular undergraduate students at Debre Markos University, North West Ethiopia

Introduction: The stature of an individual is an inherent characteristic and is considered as an important parameter of personal identification. Estimating stature from the measurement of various body parts is of particular interest to forensic scientists, anatomists and medical researchers in order to complete biological profiles after death or when measuring standing height is impossible. However, establishing the identity of an individual from mutilated, decomposed and amputated body fragments is a challenging task in medico-legal cases, and a necessity when measuring standing height is difficult. Objectives of the study: To assess the relationship between anatomical anthropometric measurements and stature in undergraduate students at Debre Markos University (DMU), Ethiopia. Materials and Methods: An institutional-based, cross-sectional, prospective study was conducted among first-year undergraduate students at DMU. The sample size was 572 and data were collected from April to June 2018. Height, weight, head circumference, head length, inter-acromial length, humeral length, ulnar length, hand length and breadth, tibial length, and foot length and breadth were measured in both sexes. The data were analyzed using SPSS version 25 statistical software. The level of significance was set at p<0.05. Results: The mean age of study participants was 21.27±1.74 years for males and 20.41±1.58 years for females. The mean height of study participants was 168.36±5.89cm for males and 165.24±4.01cm for females. The correlation coefficients (R) of anatomical anthropometric measurements with height were: head circumference (males R = 0.404, females R = 0.127), head length (males R = 0.422, females R = 0.168), inter-acromial length (males R = 0.530, females R = 0.140), right humeral length (males R = 0.539, females R = 0.163), left humeral length (males R = 0.535, females R = 0.159), right ulnar length (males R = 0.496, females R = 0.147), left ulnar length (males R = 0.498, females R = 0.144), right hand length (males R = 0.276, females R = 0.125), left hand length (males R = 0.243, females R = 0.122), right hand breadth (males R = 0.349, females R = 0.129), left hand breadth (males R = 0.331, females R = 0.124), right tibial length (males R = 0.634, females R = 0.259), left tibial length (males R = 0.632, females R = 0.258), right foot length (males R = 0.579, females R = 0.185), left foot length (males R = 0.581, females R = 0.186), right foot breadth (males R = 0.311), left foot breadth (males R = 0.306). The highest correlation was found in the right tibial length in both males and females. Conclusions: All anatomical anthropometric parameters were significantly (p<0.05) correlated with height in both sexes, except foot breadth in females. Therefore, all anatomical anthropometric parameters, including head circumference, head length, inter-acromial length, humeral length, ulnar length, hand length, hand breadth, tibial length, foot length and foot breadth, can estimate stature in both sexes, except foot breadth in females. Ethiop. J. Health Dev. 2019; 33(3):188-197] Key words: Estimation of stature, anthropometry, anatomical anthropometric parameters

Improved prediction equations for estimating height in adults from ethnically diverse backgrounds

When body height cannot be measured, it can be predicted from ulna length (UL). However, commonly used published prediction equations may not provide useful estimates in adults from all ethnicities. This study aimed to evaluate the relationship between UL and height in adults from diverse ethnic groups and to consider whether this can be used to provide useful prediction equations for height in practice. Standing height and UL were measured in 542 adults at seven UK locations. Ethnicity was self-defined using UK Census 2011 categories. Data were modelled to give two groups of height prediction equations based on UL, sex and ethnicity and these were tested against an independent dataset (n=180). UL and height were significantly associated overall and in all groups except one with few participants (P=0.059). The new equations yielded predicted height (Hp) that was closer to measured height in the Asian and Black subgroups of the independent population than the Malnutrition Universal Screening Tool (MUST) equations. For Asian men, (Hp (cm)=3.26 UL (cm)+83.58), mean difference from measured (95% confidence intervals) was-0.6 (-2.4,+1.2); Asian women, (Hp=3.26 UL+77.62), mean difference+0.5 (-1.4, 2.4) cm. For Black men, Hp=3.14 UL+ 85.80,-0.4 (-2.4, 1.7); Black women, Hp=3.14 UL+79.55,-0.8 (-2.8, 1.2). These differences were not statistically significant while predictions from MUST equations were significantly different from measured height. The new prediction equations provide an alternative for estimating height in adults from Asian and Black groups and give mean predicted values that are closer to measured height than MUST equations.

Ulna length for height in childrens weight status assessment

Ulna length for height in childrens weight status assessment

Ulnar collateral ligament insufficiency affects cubital tunnel syndrome during throwing motion: a cadaveric biomechanical study

In throwing athletes, cubital tunnel syndrome and insufficiency of the ulnar collateral ligament (UCL) are common pathologic processes of the elbow. The objective of this study was to investigate the effect of UCL tears on ulnar nerve elongation in the simulated throwing position. Eight fresh frozen cadaveric upper limbs were tested at the simulated late cocking to acceleration phase in the throwing motion using an elbow testing system. Elbow valgus laxityand ulnar nerve length and strain under 2 Nm of applied valgus torque (maximum torque in cadaveric elbow) were evaluated. Paired t-tests were used to compare all data between intact UCLs and UCLs after complete transection of the anterior oblique ligament. Linear regression analysis was used to investigate relationships between elbow valgus laxity and ulnar nerve strain. Elbow valgus laxity significantly increased after transection of the UCL. Ulnar nerve length after UCL transection was significantly greater than that in the intact condition at 60° (P = .006) and 90° of elbow flexion (P < .0001). In addition, ulnar nerve strain was positive (increased) at 60° and 90° of elbow flexion. Maximum ulnar nerve strain at 90° of elbow flexion was 3.9% ± 0.9% when the UCL was intact and 6.8% ± 0.7% after transection. UCL transection yielded significant positive correlation between elbow valgus laxity and ulnar nerve strain (P = .006; r = .4714). Increased elbow valgus laxity due to UCL insufficiency may cause elongation of the ulnar nerve and exacerbate cubital tunnel syndrome during the throwing motion.

Predator Driven Trait Changes in Anolis smaragdinus

Background: Research on the evolution of traits in regard to predator-prey relationships can illuminate the effects of migrating species and invasive species on native populations, which is increasingly relevant with heightened anthropogenic environmental disturbances shifting territories of native species. Methods: We used a replicated field experiment to test the effects that predators have on the phenotype of Anolis smaragdinus in the Bahamas. It was predicted that A. smaragdinus would rapidly evolve over six generations to have shorter fore and hind limb lengths due to the presence of the predator, Leiocephalus carinatus, driving A. sagrei and A. smaragdinus into higher habitats, which selects for shorter limb lengths. Results: ANCOVAs were performed for male and female A. smaragdinus, where only two of the thirteen measured traits, ulna length and third toe length in females, were found to have a significant year by treatment interaction between 2011 and 2017. We observed a general reduction in mean trait size when predators are present. Therefore, predators may be driving A. smaragdinus to higher perching sites which selects for smaller limb length. Also, it was found that populations of A. smaragdinus may be able to evolve in as little as six generations when predators and competitors are present. Limitations: A longer study is needed to see if other trait changes would become significant over time, since the residual means are trending in one direction. Another suggestion is to do a study with fewer experimental islands and larger founder populations. This would violate the meaning of a true founder population; however, it may allow A. smaragdinus to become fully integrated within the new environment and lead to a smaller chance of extinction. Conclusion: The study showed that the introduction of predators may cause significant phenotypic changes in female A. smaragdinus’ ulna and third toe length, while also showing a general reduction in mean trait size when predators are present. Therefore, predators may be driving A. smaragdinus to higher perching sites which selects for smaller limb length. However, the study did not show a significant change in either the fore limb length or the hind limb length between 2011 and 2017 which was predicted originally.

Anatomical study on the attachment location of forearm interosseous membrane ligament

Objective To elucidate the composition and precise attachment location of the forearm interosseous membrane ligament complex. Methods Thirty-two adult cadaveric forearm specimens were dissected to identify all ligaments of the interosseous membrane, measure the distance between the attachment site and the radius styloid process or the tip of the ulna head, and express the attachment location of the ligament by the percentage of the length to the length of the whole ulna and radius. Results The forearm interosseous membrane consists of five ligament components: central ligament, accessory ligament, distal oblique tract, proximal oblique cord and dorsal accessory oblique cord. The distal and proximal positions of the radius origin of the central ligament were 55% and 66% of the total radius length, respectively, and 30% and 42% of the total ulna length. The central points of the radius and ulna attachment location were 38% of the radius and 24% of the ulna for the accessory ligament, 10% of the radius and 16% of the ulna for the distal oblique tract, 78% of the radius and 82% of the ulna for the proximal oblique cord, and 63% of the radius and 65% of the ulna for the dorsal accessory oblique cord. Conclusion This study elucidates the precise attachment location of all the typical forearm interosseous membrane ligaments. This information is very useful for the biomechanical study of the interosseous membrane ligaments and the appropriate transplantation location of the interosseous membrane reconstruction surgery. Key words: Forearm; Anatomy; Interosseous membrane; Ligaments; Attachment location

Growth and development of the Mahogany Glider (Petaurus gracilis).

The growth and development of the endangered Mahogany Glider (Petaurus gracilis) was monitored in a captive population at Burleigh Heads, Queensland, Australia. Video surveillance confirmed that the gestation period for this species was 16 days. Morphometric data and developmental milestones were recorded from 10 Mahogany Gliders from birth to weaning. Growth curves were developed for head length, ulna length, tail length, and body weight. Weekly inspections of female pouches revealed the young's eyelid margins were visible by Day 21, the first hair erupted on the bridge of the nose at Day 30, pigmentation of the body developed at Day 63, and they started detaching from the teat intermittently, and the body was covered in short fur by Day 70. The young were left in the nest alone from Days 84 to 87, their eyes opened between Days 84 and 94, and there was a rapid increase in length and density of fur from Day 98 onwards. At Days 101 to 105 of age the young left the nest box with its mother as back young. Weaning occurred from 184 to 187 days. Typically, the reproductive rate was two young per annum per pair, but one pair produced five young in 19 months. Females produced young from 12 months to 7 years of age, males up to 9.4 years of age. The average longevity of Mahogany Gliders in the studbook in 2018 was 11.6 years. This study provides data on the reproductive biology of the Mahogany Glider that will assist in its captive breeding, management, and conservation.

Reliability of Annual Changes and Monitoring Time Intervals for Bone Strength, Size, Density, and Microarchitectural Development at the Distal Radius and Tibia in Children: A 1-Year HR-pQCT Follow-Up.

High-resolution peripheral quantitative computed tomography (HR-pQCT) imaging, together with computational finite element analysis (FEA), offers an attractive, noninvasive tool to quantify bone strength development in pediatric studies. Evidence of annual changes and errors in repeated HR-pQCT measures is limited, and time intervals required to reliably capture changes in children's bone strength or microarchitecture have not yet been defined. Our objectives were: (1) to quantify annual changes in bone strength and microarchitectural properties; (2) to define precision errors for pediatric bone strength outcomes; (3) to characterize annual changes in contrast to pediatric precision errors; and (4) to estimate monitoring time intervals (MTIs) required to reliably characterize bone development at the distal radius and tibia. We obtained distal radius (7% of ulnar length) and tibia (8%) bone properties using HR-pQCT and FEA from 38 follow-up study participants (21 girls) at baseline (mean age 10.6 years, SD 1.7 years) and after 1 year; and from 32 precision study participants (16 girls) at baseline (mean age 11.3 years, SD 1.6 years) and after 1 week. We characterized mean annual changes (paired t tests) contrasted to pediatric precision errors (CV%RMS ) and estimated MTIs. Annual increases in bone strength, total area, cortical thickness, and density ranged between 3.0% and 25.3% and 2.4% and 15.6% at the distal radius and tibia, respectively. Precision errors for all bone strength outcomes were ≤6.8% and ≤5.1% at the distal radius and tibia, respectively, and appeared lower than annual gains in bone strength at both sites. Cortical porosity decreased 19.6% at the distal radius and 6.6% at the distal tibia; these changes exceeded respective precision errors, indicating cortical bone consolidation. MTIs ranged between 0.5 years and infinity at the distal radius and 0.5 and 5.9 years at the distal tibia. Estimated MTIs suggest that pediatric bone strength, cortical bone density, and porosity development can be reliably monitored with annual measurements. © 2019 American Society for Bone and Mineral Research.

Forearm lengthening and prosthetic management in children with transverse congenital forearm deficiency

In cases of transverse congenital forearm deficiency, achieving a good prosthesis fit during childhood remains a challenge. Ulnar lengthening is a treatment option for improving the prosthesis fit. The objective of this study was to evaluate surgical ulnar lengthening and the subsequent prosthesis fit. We reviewed four cases of ulnar lengthening in children with transverse congenital forearm deficiency. The procedure was evaluated in terms of the duration of lengthening, increase in ulnar length and healing index. The elbow range of motion, functional outcome (Prosthetic Upper Extremity Functional Index, PUFI) and time spent using the prosthesis per day were evaluated. The mean age at the time of the lengthening procedure was 3.5 years, the mean duration of lengthening was 58.3 days, the mean length gain was 21 mm, and the mean healing index was 70.1 days/cm. Elbow range of motion was restricted in one patient (100°–140°) and full in the other three patients. Based on the PUFI, 88.4% of activities were performed without the prosthesis. Children only used their prosthesis to perform specific tasks. Given the high complication rate and the lack of prosthesis use during daily activities, the main indication for forearm lengthening is a very short forearm that prevents prosthesis fitting. This procedure should be performed later in life – in adolescence.

A Model for Stature Prediction from Percutaneous Ulnar Length in Adult Males of Tamil Population

The objective of this study was to derive a linear regression formula for determination of stature from right and left ulnar length in males belonging to Tamil population. The subjects consisted of 112 adult Tamil males in the age group of 21 to 30 years. With the help of digital sliding caliper, length of each side ulna was measured between tip of olecranon process and tip of styloid process and for stature, using the stadiometer, the subject was asked to stand barefooted in anatomical position and distance from heel to vertex measured. The data thus collected was statistically analyzed with SPSS software (version 23) and a population specific regression equation for stature pertaining to length of right and left ulna derived respectively and statistically compared with that of other Indian populations and found to be unique for this study population group and therefore, this will be a tool of much significance for anthropologists, forensic experts and archaeologists when dealing with mutilated forearm remains from deceased Tamil males where necessity of stature estimation for identification arises.

Anthropometric Parameters for Height Estimation in Egyptian Elderly Males

Background: Aging as a natural physiological process is accompanied with nutritional and metabolic changes that is reflected by the anthropometric indices furthermore loss of muscular and fat masses rises. elderly individuals it is complex, and sometimes impossible, to measure standing height precisely because of standing straight difficulties arising from underlying mobility issues Anthropometric indices and measuring formulas are greatly trustworthy when compared with more sophisticated methodologies such as hydro densitometry, electronic bio impedance. Aim: To assess which one of the three anthropometric measures (demi-span, ulna length and knee height) is the most accurate for height estimation in Egyptian elderly males, and to provide a nationally representative regression equation for stature prediction that could be applied to Egyptian elderly males. Methodology: A cross sectional research study was conducted to estimate height in community dwelling Egyptian ambulant elderly males. The study sample consisted of 226 community dwelling elderly males. Results: The model for using knee height to estimate standing height of Egyptian elderly males [Height = 57.345 + 2.131 (Knee height in cm)], was found to be statistically significant reflecting 63.3% of standing height changes. [Table (5)] Besides there was strong statistically significant positive correlation between measured standing heights and study predicted standing heights (P value < 0.001). [Table (6)] Finally it was revealed and displayed that by using the study equation, there is no statistically significant difference between measured and predicted heights. Conclusions: In the current research study, knee height was found to be more accurate than demi-span and ulna length for estimating height of Egyptian elderly males.

Estimation of Stature from Ulnar Length in Living Adult Females of Tamil Population

Estimation of Stature from Ulnar Length in Living Adult Females of Tamil Population

Stature Estimation by Measuring Percutaneous Length of Ulna in Indian Population

Stature Estimation by Measuring Percutaneous Length of Ulna in Indian Population

Gradual ulnar lengthening by an Ilizarov ring fixator for correction of Masada IIb forearm deformity without tumor excision in hereditary multiple exostosis: preliminary results.

Bony exostoses are benign osteocartilaginous growths that start close to growth plates. Approximately 30-60% of patients have forearm deformities. The commonly encountered forearm deformities in these patients are bowing of the radius, with or without ulnar drift of the carpus, radial head dislocation, shortening of the ulna, and radial head dislocation. The current study reported on the results of management of radial head dislocation for type IIb Masada and Oho classification of forearm deformities by Ilizarov ulnar lengthening and without tumor excision. A series of 12 patients with Masada type IIb deformity were treated by Ilizarov lengthening at AlHadra University Hospital, Alexandria, Egypt, during the period from January 2008 to June 2014. There were eight males and four females; the right forearm was affected in seven patients. The mean age of the patients was 8.7 years (range: 7.5-10 years). All cases showed ulnar shortening with distal ulnar exostosis and radial head dislocation (Masada type IIb). All patients were operated on under general anesthesia, with application of the Ilizarov frame to the forearm. The frame used was assembled of two complete rings; the proximal one was fixed to the proximal ulna and the distal ring was fixed to both radius and ulna. Ulnar osteotomy was performed between the two rings, followed by ulnar lengthening 10 days postoperatively to lengthen the ulna and pull down the radius. Over a follow-up period of 33.2 months (24-48 months), all patients showed spontaneous reduction of the radial head and correction of the forearm deformity. The range of motion improved: flexion increased from 117.5° (110-130°) to 145° (130-160°) and extension increased to 4.6° (0-10°), whereas it was 13.8° (10-20°) preoperatively and the supination increased from 46.3° (40-50°) preoperatively to 73.6° (65-80°) postoperatively. Pronation improved from a preoperative average of 37.9° (30-40°) to 70.8° (60-80°) at the end of follow-up. The average amount of ulnar length was 27.9 mm (25-35) and the duration of external fixation was 103.3 days on average, with a range of 90-130. Thus, the average external fixation index was 3.7 days/mm (range: 3.6-4.0). Gradual lengthening of the ulna and pulling down the radius with an Ilizarov frame is an excellent method for correction of forearm deformity in patients with multiple hereditary exostosis (Masada IIb). Early intervention is the key to achieving spontaneous reduction of the radial head in all patients without the need for corrective osteotomy or tumor excision. Level of evidence: level IV.

Body Length Prediction Using Ulnar Length for Children Aged 0–23 Months in East Jakarta

Body Length Prediction Using Ulnar Length for Children Aged 0–23 Months in East Jakarta

Cross-sectional Area Just Proximal to the Carpal Tunnel According to the Ulnar Variances: Positive Ulnar Variance and Carpal Tunnel Syndrome.

We evaluated the relationship between the area around the distal radioulnar joint according to the ulnar variances and the cross-sectional area using magnetic resonance imaging (MRI) scans in this prospective study of patients with carpal tunnel syndrome (CTS). From among a total of 243 patients who had been diagnosed with CTS between March 2012 and February 2017 at our hospital, 41 patients with positive ulnar variance were enrolled in group 1. As control groups, 39 healthy volunteers who underwent MRI evaluations were included in group 2 (neutral ulnar variance) and group 3 (negative variance). Basic demographic data, including age, sex, and body mass index, were recorded for all 3 groups. An area encompassing the contents of carpal tunnel (nerves/tendons) was designated as area "A," and the area just beneath the subcutaneous fat was designated as area "B" at the levels of the lunate (L) and pisiform (P) on axial MRI. Ratios of these areas ("A/B at L" and "A/B at P") were evaluated in terms of their correlations with ulnar variance. Mean age, sex, and body mass index were not statistically different among the groups, respectively. Within each group, there was no difference between "A/B at L" and "A/B at P," respectively. When comparing the 3 groups, "A/B at L" and "A/B at P" were all significantly decreased in group 1 than in other groups. Regardless of the group, ulnar length negatively correlated with both "A/B at L" and "A/B at P" ratios. We found a positive relationship between decreased cross-sectional area around the distal radioulnar joint and positive ulnar variance on radiologic investigation. These findings show the importance of variance in the positive ulna variance to the development of CTS.