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Wisniewska E, Laue D, Spinnen J, Kuhrt L, Kohl B, Bußmann P, Meier C, Schulze-Tanzil G, Ertel W, Jagielski M. Infrapatellar Fat Pad Modulates Osteoarthritis-Associated Cytokine and MMP Expression in Human Articular Chondrocytes. Cells 2023; 12:2850. [PMID: 38132170 PMCID: PMC10741519 DOI: 10.3390/cells12242850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
Osteoarthritis (OA) most frequently affects the knee joint and is associated with an elevated expression of cytokines and extracellular cartilage matrix (ECM), degrading enzymes such as matrix metalloproteinases (MMPs). Differences in gene expression of the intra-articularly located infrapatellar fat pad (IPFP) and other fatty tissue suggest its autonomous function, yet its role in OA pathogenesis remains unknown. Human IPFPs and articular cartilage were collected from OA patients undergoing total knee arthroplasty, and biopsies from the IPFP of healthy patients harvested during knee arthroscopy served as controls (CO). Isolated chondrocytes were co-cultured with either osteoarthritic (OA) or CO-IPFPs in a transwell system. Chondrocyte expression of MMP1, -3, -13, type 1 and 2 collagens, interleukin IL1β, IL6, IL10, and tumor necrosis factor TNFα was analyzed by RTD-PCR at day 0 and day 2, and TNFα secretion was analyzed by ELISA. The cytokine release in IPFPs was assessed by an array. Results: Both IPFPs (CO, OA) significantly reduced the expression of type 2 collagen and TNFα in chondrocytes. On the other hand, only CO-IPFP suppressed the expression of type 1 collagen and significantly induced the MMP13 expression. On the contrary, IL1β and IL6 were significantly induced when exposed to OA-IPFP. Conclusions: The partial loss of the suppressive effect on type 1 collagen gene expression found for OA-IPFP shows the pathological remodeling and dedifferentiation potential of the OA-IPFP on the chondrocytes. However, the significant suppression of TNFα implies that the OA- and CO-IPFP could also exhibit a protective role in the knee joint, preventing the progress of inflammation.
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Affiliation(s)
- Ewa Wisniewska
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Dominik Laue
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Jacob Spinnen
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Leonard Kuhrt
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Benjamin Kohl
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Patricia Bußmann
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Carola Meier
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Gundula Schulze-Tanzil
- Institute of Anatomy and Cell Biology, Paracelsus Medical University (PMU), Prof.-Ernst Nathan Strasse 1, 90419 Nuremberg, Germany;
| | - Wolfgang Ertel
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
| | - Michal Jagielski
- Department of Traumatology and Reconstructive Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Hindenburgdamm 30, 12203 Berlin, Germany; (E.W.); (D.L.); (J.S.); (L.K.); (B.K.); (P.B.); (C.M.); (W.E.)
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Okita Y, Miura R, Morimoto M, Sadamatsu T, Kawahara T, Gamada K. Three-dimensional volume and shape of the infrapatellar fat pad during quasi-static knee extension from 30° to 0°: comparisons of patients with osteoarthritic knees and young, healthy individuals. J Phys Ther Sci 2023; 35:507-514. [PMID: 37405182 PMCID: PMC10315202 DOI: 10.1589/jpts.35.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 04/03/2023] [Indexed: 07/06/2023] Open
Abstract
[Purpose] Previous studies suggest that the infrapatellar-fat-pad is affected by aging or knee osteoarthritis, and that the infrapatellar-fat-pad in knee osteoarthritis cases may be associated with limited mobility during knee movement. This study aimed to determine changes in the shape and volume of the infrapatellar-fat-pad between 30° and 0° of knee extension in knee osteoarthritis cases and in young, healthy individuals, and to characterize differences in patellar mobility, patellar tendon mobility, and length between the groups. [Participants and Methods] We created 3D models of the infrapatellar-fat-pad, the patellar tendon, and bones using sagittal MRI with the knee at 30° and 0°. The following four parameters were determined: (1) movement of the infrapatellar-fat-pad; (2) infrapatellar-fat-pad volume; (3) angle and surface length of the patellar tendon; and (4) patellar movement. [Results] Compared with the knee osteoarthritis group, the healthy group showed (1) reduced anterior movement of the infrapatellar-fat-pad; (2) smaller volume changes only in the infero-postero-lateral portion; and (3) no changes in the angle of the patellar tendon to the tibial plateau between 30° to 0°. [Conclusion] In conclusion, between 30° and 0°, (1) the infrapatellar-fat-pad in patients with knee osteoarthritis exhibited less anterior movement, and (2) the patellar tendon angle was diminished in patients with knee osteoarthritis compared with those of young-healthy knees.
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Affiliation(s)
- Yuriko Okita
- Sadamatsu Hospital: 537 Higashi-honmachi, Omura, Nagasaki
856-0831, Japan
| | - Ryohei Miura
- Sadamatsu Hospital: 537 Higashi-honmachi, Omura, Nagasaki
856-0831, Japan
| | - Masashi Morimoto
- Sadamatsu Hospital: 537 Higashi-honmachi, Omura, Nagasaki
856-0831, Japan
| | | | - Toshio Kawahara
- Sadamatsu Hospital: 537 Higashi-honmachi, Omura, Nagasaki
856-0831, Japan
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Tan H, Kang W, Fan Q, Wang B, Yu Y, Yu N, Duan H, Yuan P, Wang S, Chen Q, Jin C. Intravoxel Incoherent Motion Diffusion-Weighted MR Imaging Findings of Infrapatellar Fat Pad Signal Abnormalities: Comparison Between Symptomatic and Asymptomatic Knee Osteoarthritis. Acad Radiol 2023; 30:1374-1383. [PMID: 36609030 DOI: 10.1016/j.acra.2022.11.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/26/2022] [Accepted: 11/12/2022] [Indexed: 01/06/2023]
Abstract
RATIONALE AND OBJECTIVES Infrapatellar fat pad (IPFP) proton density-weighted images (PdWI) hyperintense regions on MRI are an important imaging feature of knee osteoarthritis (KOA) and are thought to represent inflammation which may induce knee pain. The aim of the study was to compare the intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI) findings of PdWI hyperintense regions of IPFP between symptomatic and asymptomatic KOA and to determine whether IVIM-DWI parameters can be used as an objective biomarker for symptomatic KOA. MATERIALS AND METHODS In total, 84 patients with symptomatic KOA, 43 asymptomatic KOA persons, and 30 healthy controls with MRI were retrospectively reviewed. Demographic, IPFP-synovitis, Western Ontario and McMaster Osteoarthritis Index (WOMAC) pain sub-score, IPFP volume and depth and quantitative parameters of IVIM-DWI were collected. The chi-square test, Binary logistic regression and receiver operating characteristic curve (ROC) analysis were used for diagnostic performance comparison. RESULTS The IPFP volume and depth were statistically significant differences between the non-KOA and sKOA groups (p<0.05). The IPFP PdWI hyperintense regions demonstrated significantly higher values of D and D* in the symptomatic KOA compared to those in the asymptomatic KOA (1.51±0.47 vs. 1.73±0.40 for D and 19.24±6.44 vs. 27.09±9.75 for D*) (both p<0.05). Multivariate logistic regression analyses showed that Higher D and D* values of IPFP hyperintense region were significantly associated with higher risks of knee pain (OR: 1.97; 95% CI: 1.21-3.19; p=0.006 for D and OR: 1.24; 95% CI: 1.09-1.41; p=0.001 for D*). Sensitivity and specificity of D value for symptomatic KOA were 80.28% and 83.33%, with an AUC of 0.78 (0.68-0.86). D* value had the sensitivity with 92.96% and a specificity of 58.33%, with an AUC of 0.82 (0.73-0.89) for symptomatic KOA. CONCLUSION IVIM-DWI can be used as an additional functional imaging technique to study IPFP with signal abnormalities on PdWI, and the D and D* values may have potential value to predict the symptom in mild-to-moderate KOA patients.
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Affiliation(s)
- Hui Tan
- From the department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277, Yanta West Road, Xi'an, Shaanxi, 710061, People's Republic of China; Department of Radiology, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Wulin Kang
- Department of Orthopedics, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Qiuju Fan
- Department of Radiology, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Bin Wang
- Institute of Medical Technology, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Yong Yu
- Department of Radiology, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Nan Yu
- Department of Radiology, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Haifeng Duan
- Department of Radiology, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Puwei Yuan
- Department of Orthopedics, The Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Shaoyu Wang
- MR senior scientific marketing specialist, Siemens Healthineers, Shanghai, People's Republic of China
| | - Qing Chen
- Institute of Medical Technology, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, People's Republic of China
| | - Chenwang Jin
- From the department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277, Yanta West Road, Xi'an, Shaanxi, 710061, People's Republic of China.
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Shiraishi R, Ueda S. Relationship between the change in infrapatellar fat pad thickness assessed using ultrasonography and anterior knee pain on squatting after anterior cruciate ligament reconstruction. J Med Ultrason (2001) 2023; 50:237-243. [PMID: 36961646 PMCID: PMC11018648 DOI: 10.1007/s10396-023-01300-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 02/11/2023] [Indexed: 03/25/2023]
Abstract
PURPOSE Anterior knee pain (AKP) may occur after anterior cruciate ligament (ACL) reconstruction. The present study investigated the relationship between the change in infrapatellar fat pad (IFP) thickness assessed using ultrasonography (US) and AKP on squatting in patients after ACL reconstruction. METHODS Patients were enrolled 3 months after ACL reconstruction using the bone-tendon-bone (BTB) technique. Subjects were divided into the AKP group (numerical rating scale [NRS] score ≥ 1) and control group (NRS score < 1) using a NRS of pain on squatting, and intergroup comparisons were performed. On US evaluation, measurement angles of the knee joint were 0° and 30° in the supine position. The IFP between the femoral intercondylar notch and patellar tendon was measured on short-axis images. The changes in IFP thickness were calculated from values measured at different angles of the knee joint. RESULTS Twenty-one patients (mean age 24.9 ± 9.3 years) were included in the present study: 12 in the AKP group (9 males, 3 females) and nine in the control group (5 males, 4 females). A significant difference in the change in IFP thickness at 3 months was observed between the AKP and control groups (0.67 ± 0.44 mm vs. 1.84 ± 0.34 mm, p < 0.001). There was a negative correlation between the change in IFP thickness and the NRS score (r = - 0.720, p < 0.001) in reconstructed knees. CONCLUSION A smaller change in IFP thickness assessed using US after ACL reconstruction was identified as a factor contributing to AKP on squatting.
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Affiliation(s)
- Ryo Shiraishi
- Rokuto Orthopedic Surgery Az, 46 Onoyama-cho, Naha City, Okinawa, 900-0026, Japan
- Department of Clinical Research and Quality Management, Graduate School of Medicine, University of The Ryukyus, 207 Uehara, Nishihara-cho, Okinawa, 903-0215, Japan
- Department of Rehabilitation Therapy, Chuzan Hospital, 6-2-1 Matsumoto, Okinawa City, Okinawa, 904-2151, Japan
| | - Shinichiro Ueda
- Department of Clinical Research and Quality Management, Graduate School of Medicine, University of The Ryukyus, 207 Uehara, Nishihara-cho, Okinawa, 903-0215, Japan.
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He J, Ba H, Feng J, Peng C, Liao Y, Li L, Cao X, Wang Z, Shen M, Wu S. Increased signal intensity, not volume variation of infrapatellar fat pad in knee osteoarthritis: A cross-sectional study based on high-resolution magnetic resonance imaging. J Orthop Surg (Hong Kong) 2022; 30:10225536221092215. [PMID: 35422165 DOI: 10.1177/10225536221092215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Infrapatellar fat pad (IPFP) is regarded as an essential knee tissue involved in osteoarthritis (OA) for its potential structural-related or metabolism-related function. This cross-sectional study aims to identify which part is more related to OA. METHODS Patients with knee OA (n = 53) and healthy controls (n = 54) were prospectively recruited. Based on high-resolution magnetic resonance imaging with a slice thickness of only 0.35 mm, IPFP structural-related parameters (volume and maximal area), metabolism-related parameter (signal), degeneration indicators, and patellar maltracking indicators (patellar translation, patellofemoral angle, and Insall-Salvati ratio) were measured. IPFP volume (maximal area, and signal) was compared between healthy controls and OA patients. The level of significance for all comparisons was set as .05. RESULTS OA patients had higher IPFP signal (672.9 ± 136.9 vs 567.3 ± 63.6, p = .009), but no significant difference in IPFP volume or maximal area compared with healthy controls. In healthy controls, IPFP signal was positively associated with age (β = 1.481; 95% CI: 0.286-2.676; p = .018); IPFP maximal area was positively related to Insall-Salvati ratio (β = 0.001; 95% CI: 0.0003-0.0017; p = .039), but not associated with patellar translation and patellofemoral angle. In OA patients, IPFP signal was positively associated with cartilage loss (β = 0.005; 95% CI: 0.003-0.007; p = .013); no correlation between knee pain and IPFP volume or maximal area was observed. CONCLUSIONS The metabolism-related function of IPFP, which can be reflected by the IPFP signal, might play a more critical role in OA progression than its structural function.
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Affiliation(s)
- Jinshen He
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Hongliang Ba
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Jing Feng
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Cheng Peng
- Department of Burns, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Yunjie Liao
- Department of Radiology, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Lifeng Li
- Department of Radiology, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Xu Cao
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Zili Wang
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Minren Shen
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
| | - Song Wu
- Department of Orthopaedic Surgery, 504354Third Xiangya Hospital of Central South University, Changsha, China
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Okita Y, Sadamatsu T, Kawahara T, Gamada, K. Volume and mobility of the infrapatellar fat pad during quasi-static knee extension after manual therapy in patients with knee osteoarthritis: a randomized control trial study. J Phys Ther Sci 2022; 34:561-570. [PMID: 35937628 PMCID: PMC9345757 DOI: 10.1589/jpts.34.561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/18/2022] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study aimed to determine whether the volume and mobility of the
infrapatellar fat pad (IPFP) change as a result of manual release or stretching during
quasi-static knee extension in patients with knee osteoarthritis (KOA). [Participants and
Methods] Fourteen patients with KOA were allocated to one of two groups: the manual
release (R) and stretching (S, control) groups. They all underwent 12 treatment sessions
in in a space of four weeks. We created 3D models of the IPFP, tibia, patella, and
patellar tendon using sagittal MRI scans with the knee at 30° or 0°. We compared the
differences in (1) the distance of anterior movement of the anterior surface of the IPFP
(IPFP movement) and (2) the volume of the IPFP, between the R and S groups, using the 3D
models. [Results] Neither group showed any anterior movement of the IPFP during
quasi-static knee extension at pre-intervention; however, both groups showed significant
anterior movement of the IPFP at post-intervention. IPFP movement decreased in the S
group, meanwhile it increased in the R group at post-intervention. [Conclusion] Anterior
movement of the IPFP was more increased by manual release than by stretching since the
latter may have shortened the distance between the patella and tibial tuberosity at 0° and
30° flexion.
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Affiliation(s)
- Yuriko Okita
- Department of Rehabilitation, Sadamatsu Hospital, Japan
| | | | | | - Kazuyoshi Gamada,
- ReaLine Lab., GLAB Corp.: 889-1 Kurose-cho, Munechika-Yanakuni, Higashihiroshima, Hiroshima 739-2504, Japan
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Katayama N, Noda I, Fukumoto Y, Kawanishi K, Kudo S. Effects of isometric contraction of the quadriceps on the hardness and blood flow in the infrapatellar fat pad. J Phys Ther Sci 2021; 33:722-727. [PMID: 34658513 PMCID: PMC8516604 DOI: 10.1589/jpts.33.722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 07/01/2021] [Indexed: 01/01/2023] Open
Abstract
[Purpose] This study aimed to clarify the influence of the isometric contraction of the
quadriceps (ICQ) with low intensity on the circulation in the infrapatellar fat pad (IFP).
[Participants and Methods] The participants were 7 males and 5 females, with an average
age of 21.5 ± 1.4 years. IFP hardness was measured using shear wave ultrasound
elastography and Biodex. Tissue oxygenation was measured via near-infrared spectroscopy
using oxygenated hemoglobin (O2Hb), deoxygenated hemoglobin (HHb), and total hemoglobin
(cHb) as indices. The mean values were calculated for three periods: 1 min of rest
immediately before the exercise task (before ICQ), the lower limit of the 10 sets during
the exercise task (during ICQ), and 3–4 min after the exercise task (after ICQ). IFP
hardness was compared between resting conditions and ICQ, and tissue oxygenation was
compared before, during, and after ICQ. [Results] ICQ significantly increased IFP
hardness. Tissue hemoglobin, O2Hb, and cHb decreased significantly during ICQ and
increased after ICQ compared to that before ICQ. HHb decreased during ICQ and recovered
significantly after ICQ. [Conclusion] In healthy participants, low-intensity ICQ increases
the hardness and oxygenation of the IFP. This study may partly explain the unknown pain
relief mechanism of exercise therapy.
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Affiliation(s)
- Naoya Katayama
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankoukita Suminoe Ward, Osaka-shi, Osaka 559-8611, Japan.,Osaka Gyoumeikan Hospital, Japan
| | - Issei Noda
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankoukita Suminoe Ward, Osaka-shi, Osaka 559-8611, Japan
| | - Yusuke Fukumoto
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankoukita Suminoe Ward, Osaka-shi, Osaka 559-8611, Japan
| | - Kengo Kawanishi
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankoukita Suminoe Ward, Osaka-shi, Osaka 559-8611, Japan
| | - Shintarou Kudo
- Graduate School of Health Sciences, Morinomiya University of Medical Sciences: 1-26-16 Nankoukita Suminoe Ward, Osaka-shi, Osaka 559-8611, Japan.,Inclusive Medical Science Research Institute, Morinomiya University of Medical Sciences, Japan
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Difference in Movement between Superficial and Deep Parts of the Infrapatellar Fat Pad during Knee Extension. J Funct Morphol Kinesiol 2021; 6:jfmk6030068. [PMID: 34449659 PMCID: PMC8395910 DOI: 10.3390/jfmk6030068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/08/2021] [Accepted: 08/11/2021] [Indexed: 02/02/2023] Open
Abstract
(1): The superficial and deep parts of the infrapatellar fat pat (IFP) have different morphological and functional characteristics. Knee pain often occurs during movement, and it is important to clarify the movement of the IFP during knee joint movement. The purpose of this study is to clarify that the movement of the superficial and deep parts of the IFP are different during knee extension in vivo using ultrasonography (US). (2): US was performed on 15 knees of 15 healthy adults. The probe was placed longitudinally at the center of the patellar tendon and the IFP was imaged. Measurements were taken during active extension of the knee from 90 degrees to 10 degrees of knee flexion at a rate of 30 times/min. The captured US videos were analyzed using Flow particle image velocimetry (Flow PIV) fluid measurement software. The region-of-interest (ROI) was set at the superficial part and the deep part of the IFP, and the flow velocity was calculated for each. (3): The flow velocity of the deep part (1.37 ± 0.13 cm/s) of the IFP was significantly faster than that of the superficial part (0.80 ± 0.23 cm/s). (4): Our results show that the flow velocity of the IFP is different between the superficial and deep parts and that US may be a better assessment tool for the movement of the IFP.
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