Patella baja
Updates to Article Attributes
Patella baja (or patella infera) is an abnormally low lying patella, which is associated with restricted range of motion, crepitations, and retropatellar pain. If long standinglongstanding, extensor dysfunction may ensue with significant morbidity. It is seen in a variety of clinical scenarios including 1:
- quadriceps dysfunction:
- poliomyelitis
- tourniquet paralysis
- bony or ligamentous trauma:
- fractures
- osteotomies
- tibial tubercle transplant
- ACL repair
- total knee replacement: seen in 25% of patients 1
- achondroplasia: usually asymptomatic
Radiographic features
A number of methods for determining patella height have been devised:
- Insall-Salvati ratio: according to the relative height of the patella and length of the patellar tendon. It is assessed on lateral radiographs or sagittal cross-sectional imaging.
- Blackburne-Peel ratio: ratio of vertical distance between tibial plateau and patellar articular surface and length of the patellar articular surface.
- Norman, Egund and Ekelund method
- Caton-Linclau method
- Blumensaat
'stechnique
It is important in the setting of previous surgery to ensure that the patella has not been resected, as change in patellar morphology will clearly affect the ratio 1.
Treatment and prognosis
PatellaTraumatic/post-surgical patella baja, when post traumatic/surgical is uncommonly asymptomaticfrequently symptomatic and requires early surgical correction as conservative measures are rarely successful. Treatment requires either a tibial tuberosity osteotomy and re-implantation proximally or patellar tendon lengthening.
-<p><strong>Patella baja</strong> (or <strong>patella infera</strong>) is an abnormally low lying patella, which is associated with restricted range of motion, crepitations and retropatellar pain. If long standing extensor dysfunction may ensue with significant morbidity. It is seen in a variety of clinical scenarios including <sup>1</sup>:</p><ul>- +<p><strong>Patella baja</strong> (or <strong>patella infera</strong>) is an abnormally low lying patella, which is associated with restricted range of motion, crepitations, and retropatellar pain. If longstanding, extensor dysfunction may ensue with significant morbidity. It is seen in a variety of clinical scenarios including <sup>1</sup>:</p><ul>
-<li><a href="/articles/blumensaats-technique">Blumensaat's technique</a></li>-</ul><p>It is important in the setting of previous surgery to ensure that the patella has not been resected, as change in patellar morphology will clearly affect the ratio <sup>1</sup>.</p><h4>Treatment and prognosis</h4><p>Patella baja, when post traumatic/surgical is uncommonly asymptomatic and requires early surgical correction as conservative measures are rarely successful. Treatment requires either a tibial tuberosity osteotomy and re-implantation proximally or patellar tendon lengthening.</p>- +<li><a href="/articles/blumensaats-technique">Blumensaat technique</a></li>
- +</ul><p>It is important in the setting of previous surgery to ensure that the patella has not been resected, as change in patellar morphology will clearly affect the ratio <sup>1</sup>.</p><h4>Treatment and prognosis</h4><p>Traumatic/post-surgical patella baja is frequently symptomatic and requires early surgical correction as conservative measures are rarely successful. Treatment requires either a tibial tuberosity osteotomy and re-implantation proximally or patellar tendon lengthening.</p>
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