X-ray pelvimetry in common marmoset (Callithrix jacchus - LINNAEUS, 1758)

Abstract

The common marmoset is an important Neotropical primate for biomedical research. With the intention of providing pelvimetric values that allow the selection of animals with better characteristics for reproduction, we studied the X-ray of the pelvis, in ventro-dorsal projection of 12 adult animals, six males and six females, belonging to the National Center of Primates -CENP. The measurements were made to right diagonal diameters (RDD), left diagonal diameter (LDD), bi-iliac middle diameter (BIMD), bi-iliac upper diameter (BIUD), bi-iliac lower diameter (BILD), sacrum-pubic diameter (SPD), and the input area of the pelvis (IAP), which were compared in relation to sex and bodily correlated with the biometrics. The results of the means and standard deviations regarding pelvimetry (cm) were: for the RDD in males of 1.91±0.14 and in the females of 2.05±0.08; LDD in males of 1.85±0.16 and in females of 2.03± 0.08; BIMD in males of 1.46±0.12 and in the females of 1.5±0; BIUD showed in males 1.3±0.1 and in females of 1.3±0.06; BILD in males of 1.35±0.15 and in females of 1.25±0.08; SPD in males of 1.68±0.09 and in females of 1.93±0.13; IAP in males of 1.9±0.26 and in the females of 2.23±0.13. It was concluded that the pelvis of Callithrix jacchus could be classified as dolicopelvic type, there is sexual dimorphism in relation to the pelvis of adult animals and that the bodily measurements have low positive correlation with pelvic measurements.Keywords: radiology, pelvis, primates RESUMO O sagui-de-tufo-branco se destaca como um importante primata neotropical para as pesquisas biomédicas. Com o intuito de fornecer valores pelvimétricos que permitam a seleção de animais com melhores características para a reprodução, estudaram-se radiografias da pelve, em projeção ventrodorsal, de 12 animais, sendo seis machos e seis fêmeas, adultos, pertencentes ao Centro Nacional de Primatas -CENP. As mensurações realizadas foram referentes aos diâmetros diagonal direito (DDD), diagonal esquerdo (DDE), bi-ilíaco médio (DBIM), bi-ilíaco superior (DBIS), bi-ilíaco inferior (DBII), sacropúbico (DSP), além da área de entrada da pelve (AEP), os quais foram comparados em

Radiographic evaluation of the forelimbs and hind limbs of marmosets (Callithrix spp.)

“…Pelvic narrowing was visualized radiographically in five marmosets (four females and one male). The pelvic diameter values obtained by pelvimetry were inferior to those described for twelve C jacchus , six males and six females, whose pelvis presented sexual dimorphism and were classified as dolicopelvic . Thus, dimension of the pelvic cavity of the four females showing a decrease of 56.95%‐68.60% of the pelvic inlet area suggested an increased risk of obstructive dystocia in case of gestation, especially given that marmosets frequently give birth to twins or even triplets .…”

“…The pelvic diameter values obtained by pelvimetry were inferior to those described for twelve C jacchus, six males and six females, whose pelvis presented sexual dimorphism and were classified as dolicopelvic. 18 Thus, dimension of the pelvic cavity of the four females showing a decrease of 56.95%-68.60% of the pelvic inlet area suggested an increased risk of obstructive dystocia in case of gestation, especially given that marmosets frequently give birth to twins or even triplets. 3,6 Regarding normal marmosets, the values of the pelvic inlet area were similar to those described for C jacchus, including 1.9 cm (± 0.26) for males and 2.23 cm (± 0.13) for females.…”

“…Pelvimetry (Figure ) was performed in the ventrodorsal view of the pelvis, as previously described for marmosets: upper bi‐iliac diameter [straight transverse line drawn at the shortest diameter of the sacroiliac articulation (right—point A, left—point B)]; lower bi‐iliac diameter [straight transverse line drawn at the ilio‐pubic junction (right—point C, left—point D)]; right diagonal diameter [line drawn from point A to point D]; left diagonal diameter [line drawn from point B to point C]; middle bi‐iliac diameter [straight transverse line of the right ilium (point E) to the left ilium (F) drawn at the point of intersection of right and left diagonal diameters]; and sacrum‐pubic diameter [measured at the central point of the upper bi‐iliac diameter (G) to the cranial portion of the pubic symphysis (point H)]. The area of the pelvic inlet was calculated as follows: (bi‐iliac medium diameter/ 2) × (sacrum‐pubic diameter/ 2) × π.…”

“…All measurements were performed in triplicate by a single examiner, using ClearCanvas Workstation ® software. Pelvimetry ( Figure 1) was performed in the ventrodorsal view of the pelvis, as previously described for marmosets 18 The ventrodorsal view was used to determine the femoral mechanical angles. 19 The mechanical lateral proximal femoral angle The measurement of varus/valgus alignment of the femur and tibia in the craniocaudal view was obtained as described for human patients.…”

Pelvimetry in bitches N.R.D. (no race defined)

“…differently from the consulted authors who worked with the specific Boston Terrier and Scottish Terrier breeds (ENEROTH et al, 1999); Brazilian Fila, German Shepherd, Pinscher, Poodle, Rottweiler and Teckel (PÁFARO, 2007) and French Bulldog (CAMPOS, 2010). We can also highlight authors who have worked with other species, namely, cattle (OKUDA et al, 1994b); buffalo herds (OLIVEIRA et al, 2001); primates (VALLE et al, 2006;PINHEIRO et al, 2016); cats (PÁFARO et al, 2007;MONTEIRO et al, 2013) and anteaters (MARTINS et al, 2018).…”