Siu Cheong Koo - Academia.edu (original) (raw)

Papers by Siu Cheong Koo

$Research paper thumbnail of Clinical outcome of dorsal versus lateral plating in proximal phalangeal fracture: A retrospective study$

Journal of Orthopaedics, Trauma and Rehabilitation

Background: Plating of proximal phalangeal fracture is the commonly adopted fixation method. Howe... more Background: Plating of proximal phalangeal fracture is the commonly adopted fixation method. However, whether placing the implant at the dorsal or lateral aspect of the phalanx can yield a better clinical outcome is still under debate. Our study aims to compare the functional outcome of dorsal plating versus lateral plating in patients suffering from a proximal phalangeal fracture. Methods: A retrospective comparative study was performed comparing the clinical outcome of dorsal and lateral plating in proximal phalangeal fracture. Fourteen patients from our center with a total of 17 proximal phalangeal fractures (excluding the thumb) were included in this study. The total range of movement and range of movement of each finger joint together with grip strength were the main focuses of this study. Operative complications and the need for subsequent related operations were also analyzed. Results: Nine cases were treated by dorsal plating and eight cases adopted lateral plating. There wa...

The Journal of Hand Surgery (Asian-Pacific Volume)

Background: This study aims to look at the intermediate-term clinical, functional and radiologica... more Background: This study aims to look at the intermediate-term clinical, functional and radiological outcomes of patients with enchondroma in hand treated with osteoscopic-assisted curettage and artificial bone substitute or bone graft. The addition of osteoscopy allows direct visualisation of the bone cavity during and after curettage of tumour tissue without the need of creating a large opening in the bone cortex. This could lead to better clearance of tumour tissue and lower risk of iatrogenic fracture. Methods: A total of 11 patients who received surgery from December 2013 to November 2020 were retrospectively reviewed. All cases had histological diagnosis of enchondroma. Patients with a follow-up period of less than 3 months were excluded. The mean duration of follow-up was 20.9 months. For the clinical outcome, we measured the total active motion (TAM) and graded with Belsky score grip strength. For the functional outcome, the Quick Disabilities of the Arm, Shoulder and Hand Que...

Journal of Wrist Surgery, 2020

Background Distal radius fracture is one of the most common injuries. Poor functional result with... more Background Distal radius fracture is one of the most common injuries. Poor functional result with restricted wrist motion can be developed when there is intra-articular fibrous tissue development arising from articular step-off and gapping. Objectives The aim of this study is to compare the functional and radiological outcome between arthroscopic-assisted reduction and fluoroscopic reduction in treating unstable intra-articular distal radius fracture. Methods We retrospectively analyzed 12 patients with intraarticular AO type C distal radius fracture treated with arthroscopic-assisted fracture reduction and internal fixation and compared them with another group of 12 patients in which fracture reduction is assessed by fluoroscopy alone (15 males and 9 females, mean age 57.3, range 27–73). The two cohorts were analyzed for differences in radiological parameters including articular stepping and gapping, palmar tilt, radial inclination, ulnar variance as well as functional outcome in r...

Journal of Orthopaedics, Trauma and Rehabilitation, 2017

Broken medullary tubes have been used for intramedullary (IM) nailing of femoral and tibial fract... more Broken medullary tubes have been used for intramedullary (IM) nailing of femoral and tibial fractures. In these reported cases, fragments of the medullary tube were retrieved by opening the fracture sites or left in situ, which might jeopardize periosteal blood supply. We herein present the case of a 58-year-old woman who underwent IM nailing for proximal humeral fracture, which was complicated by breakage of the medullary tube intraoperatively. Different instruments including guide rods, straight forceps, and cement extract hook were used to retrieve the retained fragments from the medullary canal, but these attempts were unsuccessful. Finally, the fragments were successfully removed using an anterior cruciate ligament (ACL) ENDOBUTTON depth gauge. This case highlights that medullary tubes can break during humeral IM nailing, which could be minimized by ensuring integrity of the medullary tube prior to surgery and disposing medullary tubes with more than 100 exposures. A novel meth...

Journal of Orthopaedic Surgery, 2011

A 25-year-old woman with end-stage renal failure presented with subcutaneous calcinosis cutis tha... more A 25-year-old woman with end-stage renal failure presented with subcutaneous calcinosis cutis that grew rapidly in both hands. Radiographs showed subcutaneous lobulated calcific deposits. Magnetic resonance imaging revealed a heterogeneous mass encasing segments of the abductor pollicis longus and extensor pollicis brevis tendons. Excision of the masses was performed. Histopathology revealed amorphous calcified deposits in fibrous tissue and a foreign body reaction. There was no evidence of a tubercular lesion. Further investigation revealed the presence of hyperphosphataemia and secondary hyperparathyroidism, despite a normal serum calcium level. Oral phosphate-lowering agents failed to control the condition, and recurrence was noted 6 months later. The patient finally underwent parathyroidectomy and has had no further recurrence.

Journal of Orthopaedic Surgery, 2012

purpose. To evaluate the treatment outcome of wrist and elbow arthroscopic synovectomy for patien... more purpose. To evaluate the treatment outcome of wrist and elbow arthroscopic synovectomy for patients with rheumatoid arthritis. Methods. 3 men and 18 women aged 27 to 71 (mean, 54) years underwent arthroscopic synovectomy for rheumatoid arthritis of the wrist (n=12) and elbow (n=13). All patients had received multiple medications including non-steroidal anti-inflammatory drugs, disease-modifying anti-rheumatic drugs, and steroids, as well as physiotherapy and splintage for 6 months, but the joint pain and disability persisted. The median duration of rheumatoid arthritis was 89 (range, 24-156) and 108 (range, 36-360) months for the wrist and elbow joints, respectively. According to the Larsen grading, the radiographic stages of the wrists and elbows were classified as grade 1 (n=4+4), grade 2 (n=4+5), and grade 3 (n=4+4). Visual analogue scale for pain, the wrist and elbow flexion-extension arcs, grip strength, key pinch strength, inflammatory markers, disability and symptoms were compared

Journal of Wrist Surgery, 2012

Wrist arthroscopy is typically performed under general or regional anesthesia with the aid of a t... more Wrist arthroscopy is typically performed under general or regional anesthesia with the aid of a tourniquet to maintain a bloodless field. Since the late 1970s, local anesthesia using intraarticular infiltration has been advocated for both diagnostic and therapeutic procedures in knee and ankle arthroscopy, with good results. 1,2 Nevertheless, the large volume of anesthetic solution required for an effective procedure carries a potential risk. 3 Rolf et al described the technique of injecting anesthetic solution into the portal sites alone and reported satisfactory results. 4 We have been performing wrist arthroscopy under portal site local anesthesia (PSLA) without a tourniquet since 1998. The aim of the present study was to

Journal of Hand and Microsurgery, 2021

Hand surgery in Hong Kong was borne out of necessity. It has been changing with the social, econo... more Hand surgery in Hong Kong was borne out of necessity. It has been changing with the social, economic, and political situations. The spectrum of hand surgeries evolves with time, from infection-related hand surgeries to microsurgical or non-microsurgical operations on the huge volume of industrial hand injuries, to a wider variety of reconstructions on rheumatological, congenital upper limbs, traumatic, neurological diseases, etc, to minimally invasive surgeries on hand, wrist, and elbow. Hand surgery was deeply-rooted in orthopaedics in Hong Kong and is inseparable from microsurgeries, which have built a strong foundation for any kind of its future development.

$Research paper thumbnail of Arthroscopic assisted reduction versus fluoroscopic reduction in treatment for AO type C intra-articular distal radius fracture. A review of functional and radiological outcome between two methods$

Objectives/Interrogation: Arthroscopic assisted reduction versus fluoroscopic reduction in treatm... more Objectives/Interrogation: Arthroscopic assisted reduction versus fluoroscopic reduction in treatment for AO type C intra-articular distal radius fracture. A review of functional and radiological outcome between two methods. Methods: Between April 2016 and March 2018, 24 patients (15 males,[for full text, please go to the a.m. URL]

Journal of Wrist Surgery

Background Fifth carpometacarpal joint (CMCJ) fracture dislocation is a relatively rare injury an... more Background Fifth carpometacarpal joint (CMCJ) fracture dislocation is a relatively rare injury and most will require operative treatment because of its unstable nature. Improper reduction and fixation lead to joint surface destruction, pain, and reduced grasping power. Intra-articular fragment reduction is often obscured by dorsally displaced ulnar fragment. Therefore, fifth CMCJ arthroscopy can be advantageous in assisting intra-articular fragment reduction. However, there is no detailed description of the portal landmarks or portals' relationship with adjacent important structures in the literature. Purposes To explore the feasibility and safety of fifth CMCJ arthroscopy, locations of the portals are examined in cadaveric hand specimens. Their proximity to important anatomical structures such as dorsal cutaneous branch of ulnar nerve (DCBUN), ring finger and little finger extensor digitorum communis (EDC), and extensor digiti minimi (EDM) is measured. Methods Fifth CMCJ arthro...

Hand Surgery, 2006

Flexor tendon rupture following distal radius fracture is rare. We described a case of flexor pol... more Flexor tendon rupture following distal radius fracture is rare. We described a case of flexor pollicis longus rupture, presented five years after volar plating of distal radius fracture.