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At least 217 records · Page 12Linked to original sources
PubMed1989

Ultrasonography of the adult hip joint.

The ultrasonographic distance between the hip joint capsule and femur was measured in 75 healthy adults. The mean distance was 5.1 (SD 0.7) mm. The shortest distance was 3.0 mm, the longest 7.0 mm. The difference between the right and left hip was 0.3 (SD 0.3, range 0-1.2) mm. No correlation was found between the ultrasonographic distance and the subjects' height, body weight, age or sex. The reproducibility of the measurement was good, and the interobserver correlation was 0.94. It is concluded that an ultrasonographic distance between the hip joint capsule and the femur of 7 mm or more, and a difference between the hips of 1 mm or more suggest an intracapsular effusion in the joint in adults.

Adolescent↗
PubMed2002

[Arthroscopy for the diagnosis and treatment of hip joint disease].

OBJECTIVE: To evaluate the value of arthroscopy for the diagnosis and treatment of hip joint disease. METHODS: Arthroscopy was performed in 54 patients (68 hips) from July 1998 to September 2001. Of the 54 patients, 36 were male and 18 female, aged from 17 to 64 years. The disease was located on the left side in 18 patients, the right side in 22, and both sides in 14. In this group, osteoarthritis was noted in 21 patients, avascular necrosis of the femoral head in 16, infection of the hip joint in 3, chondrosarcoma in 2, synovial-chondromatosis in 7, acetabular labral tears in 2, and spondylitis in 3. The procedures of arthroscopy consisted of removal of loose bodies, debridement, and biopsy. RESULTS: The operation made accurate diagnosis possible for chondrosarcoma, acetabular labral tears, and infection of the hip joint. After debridement of the hip joint for avascular necrosis of the femoral head, osteoarthritis and spondylitis, most patients in this group were free from pain, function and range of the motion were restored and the pathological process was delayed. The Harris hip scores increased by 27 on average. CONCLUSION: Arthroscopy plays an important role in accurate diagnosis and treatment of hip joint.

Adolescent↗
PubMed1977

99Tcm-diphosphonate scanning as an aid to diagnosis of infection in total hip joint replacements.

Local infection following total hip joint replacement is often difficult to diagnose. Bone scanning with 99Tcm-diphosphonate has been used in an attempt to detect such infection by assessing uptake of 99Tcm in the hip. Posterior view dot scans of patients with total hip joint replacements were analysed quantitatively to determine the ratios of dots in regions around the acetabular, trochanteric and femoral parts of the prosthesis compared with normal bone. The scans were also assessed visually. Patients with definite evidence of infection showed higher uptake than control patients. The clearest distinction in uptake between the two groups was in the femoral shaft region. The data from these two groups of patients were used to propose diagnostic criteria for detecting abnormalities on scans. These criteria were applied to scans of a third test group of patients who had painful hips, but no definite evidence of infection. The numerical method of analysis is less subjective and may therefore be preferable as a means of providing evidence for or against a diagnosis of infection in patients with painful hip replacements.

Hip Joint↗
PubMed1997

Retrospective cohort study of changes in hip joint phenotype of dogs in the United States.

OBJECTIVE: To determine whether there had been a significant improvement in hip joint phenotype of dogs in the United States by comparing results of evaluations done by the Orthopedic Foundation for Animals of dogs born between 1972 and 1980 with those of dogs born between 1989 and 1992 and determining whether there had been an increase in the percentage of dogs classified as having excellent hip joint phenotype. DESIGN: Retrospective cohort study. SAMPLE POPULATION: 270,978 evaluations. PROCEDURE: Numbers and percentages of dogs classified as having excellent hip joint phenotype during each period and change between periods in percentages of dogs classified as having excellent hip joint phenotype were calculated. RESULTS: Percentage of dogs born between 1989 and 1992 that were classified as having excellent hip joint phenotype (15,289/143,668; 10.64%) was significantly higher than percentage of dogs born between 1972 and 1980 that were classified as having excellent hip joint phenotype (9,960/127,310; 7.82%). The increase in percentage of dogs classified as having excellent hip joint phenotype was significantly higher for male (51%) than for female (27%) dogs. CLINICAL IMPLICATIONS: Results suggest that there has been an improvement in the hip joint phenotype of dogs in the United States between the 1970s and early 1990s and that the improvement has been greater among male than among female dogs.

Animals↗
PubMed1983

Computed tomography of the hip joint capsule.

In 95% of cases, computed tomography (CT) enables the articular capsule of the hip joint to be directly visualized. Articular effusion in the hip joint can also be recognized in the CT image. In inflammatory arthritis and active osteoarthrosis of the hip joint, thickening of the articular capsule or articular effusion appears in the CT image. In addition, "undulation" of the articular capsule sometimes occurs. However, we have also observed this wavy configuration of the hip joint capsule in discrete latent osteoarthrosis of the hip joint. It is, therefore, unequivocally indicative of disease only when seen in association with articular effusion or thickening of the capsule. Focal fatty accumulation of the capsule distinguished from articular capsule tissue by its low density.

Arthritis↗
PubMed1995

A computer simulation study of normal and abnormal hip joint contact pressure.

The contact pressure on 112 normal hip joints and 66 acetabular dysplastic hip joints was analysed using a three-dimensional rigid body spring model. Geometric models were made from conventional anteroposterior radiographs, with the assumption that the acetabular surface was spherical. In normal hips, the distribution of contact pressure was almost even over the joint surface, and the maximum contact pressure was relatively low. However, in a dysplastic hip joint, the pressure was concentrated on the anterolateral edge of the acetabulum and increased enormously not only with the reduction in lateral coverage but also with the reduction in the anterior coverage of the acetabulum. This result indicates that a three-dimensional analysis is indispensable for estimating the mechanical effect on acetabular cartilage.

Acetabulum↗
PubMed2004

Bilaterally asymmetric effects of quantitative trait loci (QTLs): QTLs that affect laxity in the right versus left coxofemoral (hip) joints of the dog (Canis familiaris).

In dogs hip joint laxity that can lead to degenerative joint disease (DJD) is frequent and heritable, providing a genetic model for some aspects of the human disease. We have used Portuguese water dogs (PWDs) to identify Quantitative trait loci (QTLs) that regulate laxity in the hip joint. A population of 286 PWDs, each characterized by ca. 500 molecular genetic markers, was analyzed for subluxation of the hip joint as measured by the Norberg angle, a quantitative radiographic measure of laxity. A significant directed asymmetry was observed, such that greater laxity was observed in the left than the right hip. This asymmetry was not heritable. However, the average Norberg angle was highly heritable as were the Norberg angles of either the right or left hips. After correction for pedigree effects, two QTLs were identified using the metrics of the left and right hips as separate data sets. Both are on canine chromosome 1 (CFA1), separated by about 95 Mb. One QTL, associated with the SSR marker FH2524 was significant for the left, but not the right hip. The other, associated with FH2598, was significant for the right but not the left hip. For both QTLs, some extreme phenotypes were best explained by specific interactions between haplotypes.

Algorithms↗
PubMed2005

Reconstructed hip joint position and abductor muscle strength after total hip arthroplasty.

We evaluated 60 limbs in 30 patients with unilateral primary total hip arthroplasty and nondiseased contralateral hip. The ratio of femoral offset (FO) to the body weight lever arm (FO ratio) and the ratio of the height of hip center (HC) to pelvic height (HC ratio) were calculated on radiographs. Isometric hip abductor strength was measured by dynamometer. The ratio of normalized strength of the reconstructed side to that of the nonoperated side was calculated (strength ratio). The FO ratio correlated positively to the strength ratio (r = 0.491; P = .0059), whereas the HC ratio correlated negatively (r = -0.568; P = .0011). Slight increase of FO ratio along with restoration of normal hip joint center erring on the side of slight inferomedial cup positioning appeared to optimize hip abductor function.

Aged↗
PubMed2003

A model-based approach to stabilizing crutch supported paraplegic standing by artificial hip joint stiffness.

The prerequisites for stable crutch supported standing were analyzed in this paper. For this purpose, a biomechanical model of crutch supported paraplegic stance was developed assuming the patient was standing with extended knees. When using crutches during stance, the crutches will put a position constraint on the shoulder, thus reducing the number of degrees of freedom. Additional hip-joint stiffness was applied to stabilize the hip joint and, therefore, to stabilize stance. The required hip-joint stiffness for changing crutch placement and hip-joint offset angle was studied under static and dynamic conditions. Modeling results indicate that, by using additional hip-joint stiffness, stable crutch supported paraplegic standing can be achieved, both under static as well as dynamic situations. The static equilibrium postures and the stability under perturbations were calculated to be dependent on crutch placement and stiffness applied. However, postures in which the hip joint was in extension (C postures) appeared to the most stable postures. Applying at least 60 N x m/rad hip-joint stiffness gave stable equilibrium postures in all cases. Choosing appropriate hip-joint offset angles, the static equilibrium postures changed to more erect postures, without causing instability or excessive arm forces to occur.

Computer Simulation↗
PubMed1996

[Controversial rotation function of certain muscles in the hip joint].

The disputed rotating function of certain muscles in the hip joint. A device constructed for that study allows to determine the rotating function of the iliopsoas muscle as well as of the uniarticular adductor muscles of the thigh in every position of the hip joint by the method of threads. The iliac muscle rotates the thigh inward in every position of flexion/extension or abduction/adduction of the hip joint. The adductor magnus muscle always is a lateral rotator by those fibres which are inserted into the medical edge of the linea aspera, while the fibres attached to the adductor tubercle rotate the thigh inward. The psoas major, pectineus, adductor longus and adductor brevis muscles are able to rotate the thigh inward as well as outward. Their rotating function depends on the specific position of flexion/extension and abduction/adduction of the hip joint: Flexion and abduction intensify the lateral rotating function of these muscles, extension and adduction intensify the medial rotating function.

Aged↗
PubMed1998

[Clinical and diagnostic imaging of labrum lesions in the hip joint].

Labral lesions are common findings in residual hip dysplasia, indicating biomechanical decompensation of the hip joint. MR-Arthrography has shown an excellent accuracy of over 90% to detect these lesions. Nevertheless, so far clinical sings, radiological diagnosis and therapeutical consequences are not well known. In a prospective study, patients suspicious for labral lesions were evaluated using a standard clinical protocol, including history, clinical signs, radiography and MR-Arthrography. Clinical signs were tested by six criteria and two provocation tests. In 11% patients clinical suspicious was wrong. Best agreement with MR-Arthrography was found for "knife sharp" groin pain (100%), impingement test (100%) and painful giving way (83%). 35% of patients showed minor (grade 2) and 52% severe (grade 3 and 4) dysplasia. Independent from grade of dysplasia, no or only slight arthrosis (grade 0 and 1) was found in 64% of patients. In 16% a single acetabular cyst could be detected on radiographs, which all could be identified as intraosseous ganglia on MR-Arthrography. Labral lesions type A (post traumatic) were found in 23% of the patients with only no or minor dysplasis (grade 1 and 2), whereas labral lesions type B (dysplastic) were found in 67% of the patients with severe dysplasia (grade 3 and 4). Clinical signs for labral lesions are typical but can also be observed in other pathologies of the hip joint. Based on the findings of this study, we recommend radiographic evaluation for dysplasia and MR-Arthrography in patients with clinical suspicion for labral lesions of the hip joint.

Acetabulum↗
PubMed2026

Effect of knee and hip joint positions on passive stiffness of the rectus femoris and vastus lateralis in healthy individuals.

Passive muscle stiffness is a key determinant of musculoskeletal function and is influenced by structural components such as titin, connective tissue, and fascia. However, the effects of joint position, muscle depth, and sex on quadriceps passive stiffness remain unclear. To investigate the passive stiffness of the rectus femoris (RF) and vastus lateralis (VL) under different joint configurations, muscle depths, and between sexes using shear wave elastography (SWE). Thirty-six healthy young adults (18 men and 18 women) participated in this randomized crossover study. Passive stiffness was assessed in four positions of knee flexion: supine with 60&#xb0; (SUP60), supine with 20&#xb0; (SUP20), sitting with 60&#xb0; (SIT60), and sitting with 20&#xb0; (SIT20). SWE measurements (m/s) were obtained from 30 regions of interest (ROIs) per muscle, categorized into superficial, intermediate, and deep levels. Data were analyzed using Generalized Estimating Equations (GEE). A significant effect of position was observed, with higher stiffness values in the SUP60 condition for both RF and VL (p&#x2009;<&#x2009;0.001). Superficial regions consistently exhibited greater stiffness compared to intermediate and deep regions across all positions (p&#x2009;<&#x2009;0.001). Additionally, men demonstrated significantly higher stiffness values than women (p&#x2009;<&#x2009;0.001). Significant interactions were found between position and muscle, as well as position and depth. Quadriceps passive stiffness is influenced by joint position, muscle depth, and sex. The SUP60 position elicits the highest stiffness, while superficial muscle regions are consistently stiffer. These findings highlight the non-uniform mechanical behavior of the quadriceps and may have implications for clinical assessment, rehabilitation, and exercise prescription. Clinical trial registration: This study was registered at Clinicaltrials.gov in June 06th, 2023. Register number NCT05905406. Link to access https//clinicaltrials.gov/study/NCT05905406.

Humans↗
PubMedDate not supplied

Neonatal mouse hip joint and hindlimb anomalies induced by prenatal exposure to Ara-C.

To induce hip joint anomalies and assess their relationship with hindlimb anomalies, pregnant mice (Jcl;ICR) were injected intraperitoneally with a single dose of 5.0 or 7.5 mg/kg of cytosine arabinoside (Ara-C) on dg 8, 9.5, or 11. On the 24th postnatal day, surviving offspring were stained by alizarin red S and anomalies were observed. Hip joint anomalies were observed only in one group exposed to 7.5 mg/kg on dg 9.5; the incidence of the hip joint anomalies in this group was about 30%. The types of hip anomalies observed were femoral shaft dysplasia, pseudoarthrosis of the femur, femoral head dysplasia, acetabular dysplasia, fusion between the femoral head and acetabulum, and pseudoarthrosis of the coxal bone. All of these anomalies were associated with preaxial hyperplasia of the hind paws and lower leg anomalies. Strangely, while newborns with no hip joint anomalies had a fairly high rate of oligodactyly, no newborn with hip joint anomalies had oligodactyly.

Animals↗