Publications by authors named "M Artuso"

326 Publications

Angular Analysis of the B^{+}→K^{*+}μ^{+}μ^{-} Decay.

Phys Rev Lett 2021 Apr;126(16):161802

Laboratoire Leprince-ringuet (llr), Palaiseau, France.

We present an angular analysis of the B^{+}→K^{*+}(→K_{S}^{0}π^{+})μ^{+}μ^{-} decay using 9  fb^{-1} of pp collision data collected with the LHCb experiment. For the first time, the full set of CP-averaged angular observables is measured in intervals of the dimuon invariant mass squared. Local deviations from standard model predictions are observed, similar to those in previous LHCb analyses of the isospin-partner B^{0}→K^{*0}μ^{+}μ^{-} decay. The global tension is dependent on which effective couplings are considered and on the choice of theory nuisance parameters.
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http://dx.doi.org/10.1103/PhysRevLett.126.161802DOI Listing
April 2021

Collateral ligament sprains of the metacarpophalangeal joint of the long fingers: Results of a surgical series of 15 patients.

Orthop Traumatol Surg Res 2021 May 2:102952. Epub 2021 May 2.

Institut Montpelliérain de la main et du membre supérieur, clinique Saint-Roch, 560, avenue du Colonel Pavelet, 34070 Montpellier, France.

Introduction: Collateral ligament sprains of the metacarpophalangeal joint (MP) of the long fingers are rare and mostly treated conservatively. Clinical examination to diagnose the severity of these injuries is mandatory. The purpose of our study is to report the results of 15 patients treated surgically.

Methods: Twenty-three patients, mean age 48, underwent surgery for Stage 3 radial collateral ligament (RCL) injuries of the middle finger (12), the ring finger (4) and the little finger (7). The mean time from trauma to surgery was 53 days. The clinical evaluation consisted of measuring active joint motion, performing laxity tests at 0°, 30° and 90° of MP flexion, testing for laxity and rotation, looking for a spontaneous overlapping finger (or hyperabducted little finger) in relaxed position and measuring the strength (Jamar).

Results: Among the 23 operated patients, RCL lesions were distal in 8 cases, proximal in 9, and mid-substance in 6. There were 2 Stener-like lesions. Preoperatively, 16 patients presented an overlapping finger over the next one and 7 had spontaneous hyperabduction of the fifth finger. Mean follow-up of the 15 patients reviewed was 24 months (8-56). Mean MP flexion-extension range of motion was 86°/11° (71-99/0-29). Mean MP ulnar laxity of the injured finger was 18°, 14° and 11° respectively at 0°, 30° and 90° and 19°, 16°and 13°on comparison to the same digit on the opposite side. Mean MP radial laxity of the injured finger was 28°, 22° and 10° respectively at 0°, 30°, 90°, same digit on opposite side was 29°, 21°, 11°. There were no postoperative overlapped or hyperabducted fingers concerning spontaneous lateral laxity in extension. The postoperative rotational laxity test showed differences of arc in supination and pronation between operated finger and healthy side of respectively -12% and +8%.

Conclusion: The postoperative results of RCL repair of the MP in the long fingers are good in spite of some residual ligamentous distension, revealed by the laxity tests. The lateral laxity sign as a simple painless clinical sign for diagnosing complete RCL tears requiring surgery needs a validating study in order to spread its use.

Level Of Evidence: IV; retrospective study.
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http://dx.doi.org/10.1016/j.otsr.2021.102952DOI Listing
May 2021

Bipedicle strap flaps for reconstruction of longitudinal dorsal finger defects: a review of 42 cases.

J Hand Surg Eur Vol 2021 Apr 28:17531934211008796. Epub 2021 Apr 28.

Hand, Peripheral Nerves, and Microsurgery Unit, Private Hospital La Chataigneraie, Beaumont, France.

We report our experience with 42 bipedicle strap flaps in 42 fingers of 37 patients for the reconstruction of long longitudinal dorsal finger defects. Twelve cases were compound lesions with tendon lacerations. All flaps healed without infection, congestion or necrosis. At follow-up, mean total active interphalangeal joint mobility was 150° and 108° in patients without and with tendon lacerations, respectively. The median scores of the short version of the Disability of Arm, Shoulder and Hand questionnaire were 5 and 7, respectively. Patients were able to return to work or to their daily activities after a mean of 6 weeks. The patients were satisfied with the appearance in 34 of the 42 flaps. We conclude that the flap is a useful option for reconstructing dorsal digital lesions. It has a texture similar to the normal dorsal digital skin, and it is easy to perform without needing microsurgery. IV.
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http://dx.doi.org/10.1177/17531934211008796DOI Listing
April 2021

Observation of a New Excited D_{s}^{+} Meson in B^{0}→D^{-}D^{+}K^{+}π^{-} Decays.

Phys Rev Lett 2021 Mar;126(12):122002

Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France.

Using pp collision data corresponding to an integrated luminosity of 5.4  fb^{-1} collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B^{0}→D^{-}D^{+}K^{+}π^{-} decay is studied. A new excited D_{s}^{+} meson is observed decaying into the D^{+}K^{+}π^{-} final state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be m_{R}=2591±6±7  MeV, Γ_{R}=89±16±12  MeV, and J^{P}=0^{-}, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as D_{s0}(2590)^{+}, is a strong candidate to be the D_{s}(2^{1}S_{0})^{+} state, the radial excitation of the pseudoscalar ground-state D_{s}^{+} meson.
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http://dx.doi.org/10.1103/PhysRevLett.126.122002DOI Listing
March 2021

Use of Gracile and semi-tendinosus tendons (GRAST) for the reconstruction of irreparable rotator cuff tears.

BMC Musculoskelet Disord 2021 Apr 5;22(1):331. Epub 2021 Apr 5.

Unité de chirurgie du membre supérieur, Clinique Saint Jean l'Ermitage, 272 avenue Marc Jacquet, 77000, Melun, France.

Background: Irreparable rotator cuff tears are common and difficult to treat. Techniques for "filling the loss of substance" require fixation to the rotator cuff stump (tendon augmentation) or to the glenoid (superior capsular reconstruction), which are complicated by the narrow working zone of the subacromial space. The main objective of this study was to determine whether a braided graft of gracilis (GR) and semitendinosus (ST) could fill a loss of tendon substance from an irreparable rupture of the supra- and infraspinatus, by fixing the graft to the greater tuberosity and the spine of the scapula.

Methods: This was a cadaveric study with the use of ten specimens. The GRA and ST tendons were harvested, braided and reinforced with suture. An experimental tear of the supraspinatus (SS) and upper infraspinatus (IS) retracted at the glenoid was made. The GRAST transplant was positioned over the tear. The transplant was attached to the greater tuberosity by two anchors and then attached to the medial third of the scapular spine by trans-osseous stitching. The percentage of filling obtained was then measured and passive mobility of the shoulder was assessed. We proceeded to the same technique under arthroscopy for a 73 years old patient whom we treated for a painful shoulder with irreparable cuff tear. We inserted a GRAST graft using arthroscopy.

Results: The Braided-GRAST allowed a 100% filling of the loss of tendon substance. Mobility was complete in all cases.

Conclusion: This technique simplifies the medial fixation and restores the musculo-tendinous chain where current grafting techniques only fill a tendinous defect. The transplant could have a subacromial "spacer" effect and lower the humeral head. The donor site morbidity and the fate of the transplant in-vivo are two limits to be discussed. This anatomical study paves the way for clinical experimentation.
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http://dx.doi.org/10.1186/s12891-021-04197-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8020539PMC
April 2021
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