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Biomedical subjects

Daniel K H Yip

Publications and source records attributed to Daniel K H Yip.

6 recordsLinked to original sources
PubMed2005

A simple device in shoulder arthroscopy: the suture assistant.

Arthroscopic reconstructive surgery in the shoulder is an extremely demanding. The advent of suture anchors, arthroscopic knot-tying techniques, and new arthroscopic instruments has greatly facilitated its development. Knowledge of the anatomy and surgical principles alone are not enough. Good visualization is critical. We describe a simple home-made device that can be very useful in improving visualization and in helping to retrieve sutures during the knot-tying stage, especially in smaller shoulders. We introduce the concept of "bringing the suture" to the instrument rather than "taking the instrument to the suture."

Arthroscopy↗
PubMed2004

Distal rotational alignment of the Chinese femur and its relevance in total knee arthroplasty.

The rotational alignments of the distal femur in southern Chinese subjects were investigated. Chinese femurs are significantly more externally rotated. This is new evidence to suggest a racial difference in the distal femoral geometry. During total knee arthroplasty, a common recommendation is to allow 4 degrees of external rotation. The clinical significance of our study is that this need to be modified to 6 degrees for Chinese women and 5 degrees for Chinese men. This racial difference can be incorporated into a new concept of "a mountain and a molehill." This concept is presented in this report.

Adolescent↗
PubMed2004

How to use cuff suture instruments: the concept of "concave in and concave out".

Arthroscopic reconstructive surgery of the shoulder is extremely demanding. The advent of suture anchors and knot-tying instruments has greatly facilitated its development. Knowledge of the anatomy and surgical principles alone is not enough. Familiarity with specific instruments is also important. We describe our experience with the Elite Cuff Stitch Suture Relay (Smith & Nephew, London, U.K.). We describe a new concept on how to use this suture passer or similar instrument. We advocate this new concept of "concave in and concave out."

Arthroscopy↗
PubMed2003

Arthroscopic surgery in the posterior compartment of the knee: Suture fixation of anterior and posterior cruciate ligament avulsions.

Anterior and posterior cruciate ligament avulsion injuries in the posterior compartment of the knee are most commonly dealt with using open approaches. We report an arthroscopic method of treatment using sutures, without the need of any metal implants, that can be safely used in patients with open physes and without the need of a 70 degrees arthroscope.

Anterior Cruciate Ligament↗
PubMed2002

Congenital anteroposterior spinal dissociation in Larsen's Syndrome: report on two operated cases with long-term follow-up.

STUDY DESIGN: The outcome of two patients with Larsen's syndrome after spinal surgery was evaluated after follow-up for 9 and 16 years. OBJECTIVE: To report on a new phenomenon of anteroposterior dissociation of the vertebrae in Larsen's syndrome. To demonstrate that it can be visualized before surgery with imaging and also seen intraoperatively. To show that the neurologic recovery after surgery is sustained and to review the technical reasons for the difficulties in achieving a surgical fusion. The critical role of CT scanning will be illustrated. SUMMARY OF BACKGROUND DATA: The results of preoperative and postoperative radiologic investigations and intraoperative findings are presented to support this new phenomenon. METHODS: Two patients underwent multiple spinal surgeries because of a deteriorating myelopathic clinical status. Intraoperatively, anteroposterior dissociation was documented in both patients. There was great difficulty in obtaining a surgical fusion, and an unusually long circumferential fusion was eventually necessary to obtain stability. Prolonged halo-vest immobilization was essential. RESULTS: Neurologic recovery was sustained over time, and the spinal deformity did not deteriorate. CONCLUSION: Awareness of this phenomenon is essential to the management of spinal deformities in Larsen's syndrome when presenting with myelopathy. Special features in the radiologic workup should be sought after so as to plan staged surgical procedures. Conventional principles of planning of fusion levels are inadequate. Early treatment is advocated, as the neurologic compromise is reversible.

Bone and Bones↗