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Fulltext Tracking traction force changes of single cells on the liquid crystal surface

Soon CF, Tee KS, Youseffi M, Denyer MC

Biosensors (Basel), 2015 Mar;5(1):13-24.
PMID: 25808839 DOI: 10.3390/bios5010013

Cell migration is a key contributor to wound repair. This study presents findings indicating that the liquid crystal based cell traction force transducer (LCTFT) system can be used in conjunction with a bespoke cell traction force mapping (CTFM) software to monitor cell/surface traction forces from quiescent state in real time. In this study, time-lapse photo microscopy allowed cell induced deformations in liquid crystal coated substrates to be monitored and analyzed. The results indicated that the system could be used to monitor the generation of cell/surface forces in an initially quiescent cell, as it migrated over the culture substrate, via multiple points of contact between the cell and the surface. Future application of this system is the real-time assaying of the pharmacological effects of cytokines on the mechanics of cell migration.

Matched MeSH terms: Traction/methods*
Fulltext Gradual reduction of supracondylar fracture of the humerus in children reporting late with a swollen elbow

Devnani AS

Singapore Med J, 2000 Sep;41(9):436-40.
PMID: 11193116

AIM: To study the outcome of gradual reduction by skin traction of supracondylar fracture of the humerus in children with swollen elbow, who seek treatment two days or longer after the injury.
METHOD: Fifteen children aged between 4 and 11 years (average 7 years 11 months), who had initially consulted a traditional practitioner, reported between 2 and 21 days (average 7.5) after the injury were treated by skin traction with the elbow kept straight and the forearm in position of comfort.
RESULTS: The average duration of stay in hospital was 14 days. All fractures healed; there was no incidence of myositis ossificans or neurovascular deficit. All patients had functional range of movements at the elbow within 6 months. Five patients developed cubitus varus deformity greater than 5 degrees, they were classified as poor result. Four out of these 5 patients had sought treatment after a delay of 7 days or longer. There were 9 good (60%), 1 fair (7%) and 5 poor (33%) results.
CONCLUSION: Gradual reduction by skin traction is safe. It is possible to achieve satisfactory reduction if the delay is up to 7 days. The results with regards to deformity and function were comparable with those obtained following open or closed Kirschner wire fixation.

Matched MeSH terms: Traction/methods*
The use of pre-operative halo traction to minimize risk for correction of severe scoliosis in a patient with Fontan circulation: a case report and review of literature

Chan CY, Lim CY, Shahnaz Hasan M, Kwan MK

Eur Spine J, 2016 05;25 Suppl 1:245-50.
PMID: 27028615 DOI: 10.1007/s00586-016-4538-9

PURPOSE: Patients with Fontan circulation have increased cardio-respiratory risk during major spinal surgery. We report a case of severe scoliosis with a Cobb angle of 123.3° in a 16-year-old boy with Fontan circulation treated with single stage posterior segmental pedicle screw instrumentation and fusion.
METHODS: Case report.
RESULTS: The use pre-operative halo-ring traction for a duration of 6 weeks in this case lead to improvement in cobb angle from 123.3°, kyphotic angle 87.1° to cobb angle of 78.0°, kyphotic angle 57.2° (on bending and stress films). The operation was completed in 150 min, blood loss 1050 ml (25 ml/kg), and cell salvage of 490 ml. He was immediately extubated post correction, but monitored in ICU for a day. Total length of stay was 8 days without any perioperative morbidity or allogeneic blood transfusion. Final post-operative radiograph showed a cobb angle of 44.2°, kyphotic angle 22.8°. Follow up at 27 months showed solid union with no significant loss of correction.
CONCLUSION: From this case experience, pre-operative halo traction is a useful surgical strategy in patients with Fontan circulation with severe kyposcoliosis to achieve adequate correction without additional osteotomies to minimize the risk of surgical correction.

Matched MeSH terms: Traction/methods*

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