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Current Sports Medicine Reports Jun 2020The iliopsoas is a deep muscle group which anatomically connects the spine to the lower limbs. It is composed of the iliacus, psoas major, and psoas minor muscles. The... (Review)
Review
The iliopsoas is a deep muscle group which anatomically connects the spine to the lower limbs. It is composed of the iliacus, psoas major, and psoas minor muscles. The iliopsoas functions as the primary hip flexor. Because the iliopsoas is important for daily activities, including sports, impairments and pathology associated with this muscle group can cause significant limitations. Evaluating pathology associated with the iliopsoas muscle group can be challenging because the patient's complaints are often vague and difficult to discern from other hip problems. This article will review relevant anatomy, discuss common pathologies, present clinical based examination methods, and outline conservative treatment interventions focusing on manual therapy and active exercises.
Topics: Humans; Musculoskeletal Diseases; Physical Therapy Modalities; Psoas Muscles
PubMed: 32516195
DOI: 10.1249/JSR.0000000000000723 -
Abdominal Radiology (New York) May 2022Low muscle mass and quality is associated with poor surgical outcomes. Psoas muscle density (PMD)is a validated surrogate for muscle quality that can be easily measured...
OBJECTIVE
Low muscle mass and quality is associated with poor surgical outcomes. Psoas muscle density (PMD)is a validated surrogate for muscle quality that can be easily measured from a clinical computed tomography (CT) scan. The objective of this study was to investigate the association between PMD and short-term postoperative outcomes in patients with acute mesenteric ischemia (AMI).
METHODS
From April 2006 and September 2019, the clinical data of all patients who underwent surgical intervention with a preoperative diagnosis of AMI and had preoperative non-contrast CT images available were retrospectively reviewed. PMD was measured by CT at the third lumbar vertebra. The lowest quartile of PMD for men and women in all patients was used as sex-specific cut-off values for low PMD. Univariate and multivariate analyses evaluating risk factors of postoperative complications and 30-day mortality were performed.
RESULTS
The cohort consisted of 88 patients with a mean age of 58.8 ± 16.2 years, of whom 21 (23.9%) patients had low PMD based on the diagnostic cut-off values (40.5 HU for men and 28.4 HU for women), 35 (39.8%) patients developed complications within 30 days of the operation, and 10 (11.3%) patients died within 30 days of surgery. Low PMD patients had a higher risk of postoperative complications and 30-day mortality than patients without low PMD patients. In a multivariate analysis, low PMD and low psoas muscle area (PMA) were independent predictors of postoperative complications. However, only low PMD remained an independent risk factor for 30-day mortality.
CONCLUSIONS
Preoperative assessment of the PMD on CT can be a practical method for identifying AMI patients at risk for postoperative complications and 30-day mortality.
Topics: Adult; Aged; Female; Humans; Male; Mesenteric Ischemia; Middle Aged; Postoperative Complications; Psoas Muscles; Retrospective Studies; Risk Factors
PubMed: 32892241
DOI: 10.1007/s00261-020-02714-0 -
Annals of Medicine 2023In the meta-analysis, psoas muscle measurements were significantly associated with mortality among men ( < 0.05), with high heterogeneity in the associations across... (Meta-Analysis)
Meta-Analysis
RESULTS
In the meta-analysis, psoas muscle measurements were significantly associated with mortality among men ( < 0.05), with high heterogeneity in the associations across all cohorts. There was very little difference in the association between PMA and PMD and mortality (HR 0.83, 95% CI 0.69-0.99, = 0.002; HR 0.85, 95% CI 0.77-0.94, = 0.041 for one SD increase in PMA and PMD in the random effects model). Combining PMA and PMD into one composite variable by multiplying their values together showed the most robust association in terms of the magnitude of the effect size in men (HR, 0.77; 95% CI 0.73-0.87, < 0.001). Indexing PMA to body size did not result in any significant differences in this association. Among women, psoas muscle measurements were not associated with long-term mortality in this meta-analysis.
CONCLUSIONS
Different psoas muscle measurements were significantly and very similarly associated with mortality among men but not among women. No single measurement stands out, although combining PMA and PMD seems to be a slightly stronger estimate in terms of effect size and should be considered in further studies.
Topics: Male; Female; Humans; Psoas Muscles; Muscles
PubMed: 37738519
DOI: 10.1080/07853890.2023.2259798 -
European Journal of Vascular and... Jan 2022
Topics: Aneurysm, Infected; Computed Tomography Angiography; Humans; Kidney Diseases; Lumbar Vertebrae; Male; Middle Aged; Psoas Muscles; Stents; Tuberculosis, Spinal
PubMed: 34774373
DOI: 10.1016/j.ejvs.2021.09.021 -
Journal of Cachexia, Sarcopenia and... Dec 2023Segmentectomy is considered a less invasive procedure than lobectomy for patients with non-small cell lung cancer (NSCLC); however, little is known about the...
BACKGROUND
Segmentectomy is considered a less invasive procedure than lobectomy for patients with non-small cell lung cancer (NSCLC); however, little is known about the physiological mechanism underlying the lower invasiveness of segmentectomy. This study is aimed to compare the differences in the long-term changes in the psoas muscle mass after segmentectomy and lobectomy in patients with NSCLC.
METHODS
Overall 315 recurrence-free patients who underwent segmentectomy (n = 93) or lobectomy (n = 222) for clinical stage 0-I NSCLC between January 2016 and December 2018 and underwent computed tomography during the entire period of 6 months ≤ postoperative year (POY) 0.5 < 12 months, 12 months ≤ POY 1 < 24 months, 24 months ≤ POY 2 < 36 months, and 36 months ≤ POY 3 < 48 months were included. Bilateral psoas muscle area (PMA) at the L3 level was measured using each cross-sectional computed tomography scan. Differences between the segmentectomy and lobectomy groups in the mean change of postoperative PMA from the preoperative period were analysed using Student's t-test and mixed analysis of variance. Multivariable analysis was performed to identify the risk factors for PMA loss on POY 3 using logistic regression analysis.
RESULTS
The lobectomy group had a significantly larger PMA change than the segmentectomy group during each postoperative period (P < 0.001). Mixed analysis of variance revealed that the mean PMA change was significantly smaller in the segmentectomy group than in the lobectomy group during the observation period (P < 0.001). The mean change in the PMA was significantly larger from POY1 (-2.5%) to POY2 (-3.9%) and POY3 (-4.7%) in the lobectomy group (P = 0.003 and P < 0.001). However, PMA remained unchanged during the postoperative observation period in the segmentectomy group. In the multivariable analysis, the risk factors for PMA change ≤-3.3% (cut-off: mean change of PMA) at POY3 included lobectomy [odds ratio (OR), 3.32; 95% confidence interval (CI), 1.90-5.82; P < 0.001], male sex (OR, 1.92; 95% CI, 1.02-3.62; P = 0.044) and open thoracotomy (OR, 1.84; 95% CI, 1.11-3.05; P = 0.017). After propensity score matching, the mean change in PMA was smaller in the segmentectomy group (n = 75) than in the lobectomy group (n = 75) during the postoperative observation period (P < 0.001).
CONCLUSIONS
Psoas muscle mass was better maintained during the postoperative period by segmentectomy than by lobectomy. Psoas muscle mass reduction progressed over a long postoperative period after lobectomy. Segmentectomy via complete video-assisted thoracic surgery is associated with a lower likelihood of sarcopenia progression.
Topics: Humans; Male; Carcinoma, Non-Small-Cell Lung; Lung Neoplasms; Pneumonectomy; Psoas Muscles; Cross-Sectional Studies
PubMed: 37740651
DOI: 10.1002/jcsm.13328 -
The Korean Journal of Gastroenterology... Nov 2023Sarcopenia is a crucial factor in assessing the nutritional status of chronic liver disease patients and predicting their prognosis and survival. The serum ammonia level... (Review)
Review
Sarcopenia is a crucial factor in assessing the nutritional status of chronic liver disease patients and predicting their prognosis and survival. The serum ammonia level is closely associated with sarcopenia regarding ammonia, a key regulator in the liver-muscle axis. In addition, various changes in energy metabolism and hormones are also involved in sarcopenia. The psoas muscle area can represent the overall skeletal muscle mass in liver disease patients. Therefore, measuring the psoas muscle area with computed tomography or magnetic resonance imaging is considered an objective and reliable method for assessing muscle mass. Providing sufficient calorie and protein intake is crucial for preventing and treating sarcopenia. In addition, engaging in appropriate exercise and addressing concurrent hormonal and metabolic changes can be helpful.
Topics: Humans; Sarcopenia; Ammonia; Liver Diseases; Psoas Muscles; Prognosis; Retrospective Studies
PubMed: 37997219
DOI: 10.4166/kjg.2023.127 -
Transplantation Proceedings Sep 2022Sarcopenia is associated with adverse outcomes in end-stage kidney disease. We evaluated if pretransplant sarcopenia affects posttransplant outcomes in kidney transplant...
BACKGROUND
Sarcopenia is associated with adverse outcomes in end-stage kidney disease. We evaluated if pretransplant sarcopenia affects posttransplant outcomes in kidney transplant (KT) recipients.
METHODS
In this single-center retrospective study of adult patients with end-stage kidney disease, we analyzed the association between pre-KT psoas muscle cross-sectional area and critical posttransplant outcomes of decline in estimated glomerular filtration rate (eGFR), graft loss, rehospitalization, and mortality using Cox proportional hazard model adjusted for age, sex, and race.
RESULTS
Pre-KT abdomen and pelvic computed tomography scans performed during evaluation for KT eligibility were available for 573 KT recipients. Of these, 465 KT recipients received kidney alone transplant, 71 received simultaneous liver kidney transplant (SLK), and 37 received simultaneous pancreas kidney transplant (SPK). Patients were 49 (SD, 13) years old, 16% Black, and 60% men. For kidney alone transplant recipients, a higher psoas muscle cross-sectional area was associated with a shorter length of hospitalization (β coefficient = -0.003; 95% CI, -0.005 to -0.0007). Conversely, pre-KT psoas muscle cross-sectional area did not predict decline in eGFR, graft loss, mortality, or early rehospitalization. For SLK recipients, psoas muscle cross-sectional area did not predict any of the priori outcomes. For SPK recipients, higher pretransplant psoas muscle cross-sectional area predicted a longer length of hospitalization (β coefficient = 0.03; 95% CI, 0.01-0.05). There was no association between psoas muscle cross-sectional area and other outcomes assessed.
CONCLUSIONS
Pretransplant psoas muscle cross-sectional areas are not predictive of post-transplant decline in eGFR, graft loss, rehospitalization or mortality in kidney alone, SPK, or SLK transplants.
Topics: Adult; Male; Humans; Adolescent; Female; Graft Survival; Psoas Muscles; Retrospective Studies; Sarcopenia; Kidney Failure, Chronic; Risk Factors
PubMed: 35933230
DOI: 10.1016/j.transproceed.2022.05.035 -
Journal of Cachexia, Sarcopenia and... Aug 2023A common method for diagnosing sarcopenia involves estimating the muscle mass by computed tomography (CT) via measurements of the cross-sectional muscle area (CSMA) of...
BACKGROUND
A common method for diagnosing sarcopenia involves estimating the muscle mass by computed tomography (CT) via measurements of the cross-sectional muscle area (CSMA) of all muscles at the third lumbar vertebra (L3) level. Recently, single-muscle measurements of the psoas major muscle at L3 have emerged as a surrogate for sarcopenia detection, but its reliability and accuracy remain to be demonstrated.
METHODS
This prospective cross-sectional study involved 29 healthcare establishments and recruited patients with metastatic cancers. The correlation between skeletal muscle index (SMI = CSMA of all muscles at L3/height , cm /m ) and psoas muscle index (PMI = CSMA of psoas at L3/height , cm /m ) was determined (Pearson's r). ROC curves were prepared based on SMI data from a development population (n = 488) to estimate suitable PMI thresholds. International low SMI cut-offs according to gender were studied for males (<55cm /m ) and for females (<39 cm /m ). Youden's index (J) and Cohen's kappa (κ) were calculated to estimate the test's accuracy and reliability. PMI cut-offs were validated in a validation population (n = 243) by estimating the percentage concordance of sarcopenia diagnoses with the SMI thresholds.
RESULTS
Seven hundred and sixty-six patients were analysed (mean age 65.0 ± 11.8 years, 50.1% female). Low SMI prevalence was 69.1%. Correlation between the SMI and PMI for the entire population was 0.69 (n = 731, P < 0.01). PMI cut-offs for sarcopenia were estimated in the development population at <6.6cm /m in males and at <4.8 cm /m for females. The J and κ coefficients for PMI diagnostic tests were weak. The PMI cut-offs were tested in the validation population where 33.3% of the PMI measurements were dichotomously discordant.
CONCLUSIONS
A diagnostic test employing single-muscle measurements of the psoas major muscle as a surrogate for sarcopenia detection was evaluated but found to be unreliable. The CSMA of all muscles must be considered for evaluating cancer sarcopenia at L3.
Topics: Male; Humans; Female; Middle Aged; Aged; Sarcopenia; Psoas Muscles; Cross-Sectional Studies; Prospective Studies; Reproducibility of Results; Neoplasms
PubMed: 37203274
DOI: 10.1002/jcsm.13230 -
Scientific Reports Jun 2022This study aimed to investigate the associations of computed tomography (CT)-measured psoas muscle index (PMI: psoas muscle area normalized by height) and psoas muscle...
This study aimed to investigate the associations of computed tomography (CT)-measured psoas muscle index (PMI: psoas muscle area normalized by height) and psoas muscle density (PMD: average of bilateral psoas muscle CT values [Hounsfield unit (HU)]) with mortality in patients undergoing hemodialysis. We included 188 hemodialysis patients who underwent abdominal CT. PMI and PMD were measured at the third lumbar vertebral level. We found that PMI and PMD were independently associated with the geriatric nutritional risk index and log C-reactive protein, respectively. The optimal cut-off values of PMI and PMD for men and women were 3.39 cm/m and 41.6 HU, and 2.13 cm/m and 37.5 HU, respectively. During follow-up (median 3.5 years), 69 patients died. Lower PMI and lower PMD were independently associated with an increased risk of all-cause mortality [adjusted hazard ratio (aHR) 2.05, 95% confidence interval (CI) 1.14-3.68; aHR 3.67, 95% CI 2.04-6.60), respectively]. The aHR for lower PMI and lower PMD vs. higher PMI and higher PMD was 5.34 (95% CI 2.38-11.97). The addition of PMI and PMD to the risk model significantly improved C-index from 0.775 to 0.893 (p < 0.00001). The combination of PMI and PMD may improve mortality prediction in patients undergoing hemodialysis.
Topics: Aged; Female; Humans; Male; Prognosis; Psoas Muscles; Renal Dialysis; Retrospective Studies; Sarcopenia; Tomography, X-Ray Computed
PubMed: 35729286
DOI: 10.1038/s41598-022-14927-y -
Nutrition (Burbank, Los Angeles County,... Jan 2022Skeletal muscle loss and osteoporosis are major medical and socioeconomic concerns as the global population ages. Studies have reported that skeletal muscle mass...
OBJECTIVES
Skeletal muscle loss and osteoporosis are major medical and socioeconomic concerns as the global population ages. Studies have reported that skeletal muscle mass correlates to bone mineral density (BMD). The psoas muscle index (PMI), measured as the L3 cross-sectional areas of the right and left psoas divided by the square of height, has a positive correlation with the total volume of skeletal muscle in the body. This study aimed to evaluate relationships between PMI and BMD and fracture risk estimated by the Fracture Risk Assessment Tool (FRAX).
METHODS
Preoperatively acquired, plain computed tomography images at the L3 level were used to measure PMI in 87 people with degenerative spinal diseases. We evaluated the correlation between PMI and BMD and fracture risk estimated by FRAX.
RESULTS
PMI was significantly correlated with BMD in the entire lumbar spine and femoral neck (r = 0.413 and 0.525, both P < 0.001). People with osteoporosis showed significantly lower PMI than those without (P < 0.05). PMI was also significantly correlated with FRAX score (r = -0.545, P < 0.001). Furthermore, based on the recommendation of osteoporosis treatment, participants were divided into two groups: FRAX ≥15% (R group) and FRAX <15% (C group). The R group showed significantly lower PMI than the C group (P < 0.001). Receiver operating characteristic curve analysis revealed that PMI has moderate accuracy in diagnosing osteoporosis and FRAX ≥15%.
CONCLUSIONS
PMI was significantly associated with BMD and fracture risk. PMI measurement is straightforward and may increase the diagnosis rate of osteoporosis and fracture risk.
Topics: Absorptiometry, Photon; Bone Density; Humans; Osteoporosis; Osteoporotic Fractures; Psoas Muscles; Risk Assessment; Risk Factors; Spinal Diseases
PubMed: 34474186
DOI: 10.1016/j.nut.2021.111428