Postoperative Infection

A bacterial infection usually causes the postoperative infection; it could be due to any reason, ranging from prolonged surgery and a patients susceptibility, to the negligence of health care workers. In case of surgery, it also depends on the skill of the surgeon. An overview of different medical complications can explain the reasons more efficiently.

Bacterial infection relating to or resembling the eye; is fortunately a rare but very harmful complication of cataract surgery. Normally referred as Endophthalmitis, (as it relates to the vitreous humour of the eye cavity) it is the accumulation of morbific matter in an abscess or a vesicle and the discharge of pus confined to the posterior segment.

The microorganism Staphylococci are considered the cause of the most infections. These are more prevalent in hotter climates. Contemporarily, conjunctive cultures performed preoperatively, have confirmed a high prevalence of these organisms.

Endophthalmitis

It is a global condition, throughout the earlier half of the 20th century there was an incidence of 11 per 1000 operations (1.1%), improving to 2 incidences per 1000 operations (0.2%) by 1960s. but after that -with all the advances of cataract surgery- today our results have advanced little. Infection prevention has improved little in recent times.

Orthopedic Surgery

In orthopedic surgery overuse of antibiotics is problematic in treating post-surgical infections. Antibiotics used postoperatively can disguise the symptoms of infection from resistant organisms.

Causes

Inadequate surgical practices or inadequate sterile technique is concerned as a major reason in the occurrence of Endophthalmitis. There is no clear answer for prevention.
Bacteria are brought into the eye during surgery. If the innoculum is persistent and the immune system is not strong enough to fight it then an infection is imminent.

These particular surgical incidents may be reason to induce the risk: Prolonged surgery, Rupture of posterior capsule, Vitrectomy, Retention of lens fragments, Wound dehiscence, Polypropylene Haptics, and Left eye significantly.

Preoperative arterial calcification is major risk factors for arterial complications in TKA, also the history of prior grafts, large flexion contracture, diabetic patients and prolonged postoperative epidural.

Patient

Three factors immerge as the main cause in most patients,

1. the state of immune system
2. Age as a causative factor
3. Diabetes is also considered a reason but not consistently.

The Patients suffering from obesity, stiff knees, or hypertrophic arthritis are more at risk of orthopedic infection.

Diagnosis and Treatment

Intuition is required to evaluate postoperative infections. Patients are more likely to prevail when antibiotics are avoided as much as possible (to assess the presence of infection), and prompt treatment is often achieved when infection is found in early stage.

Early identification of the problem and immediate treatment is a necessity. Suitable postoperative evaluation is required to accomplish early diagnosis. Surgical removal, culture and antibiotic cover is also necessary.

The diagnosis of orthopedic infection needs many considerations following total knee arthroplasty (TKA), it has to be checked whether the wound has gone intensely infected Or the infection is only superficial or deep in the tissue, to check whether multiple organisms are infected, and also the possibility of true infection or wound inflammation.

Escalation and fast manipulation are the required option to consider when rupture occurs; postponing might lead to quadriceps atrophy and global instability.

In high-risk patients, in case of ruptures, symptoms include knee buckling or inability to climb stairs or inclines. Best procedures to avoid infections require augmentation rather than suture repair or stapling, as suture repair has a high rate of deep infection.

Prevention

The bacteria normally implanting this problem are organisms that usually inhabit the conjunctive sac. Repeated infection by less normal bacteria could point to an external alien source. Usual surgical prophylactic procedures should be observed literally, no surgical teams should be self-satisfied and sterile procedure should be thoroughly considered.

Routine surveillance must be performed of practices, by all personnel and possible sources of contamination has to be considered.

For example:

1. Re-use of medications vials, bottles, drop or ointments.
2. Routine washing of hands between patients for all personnel.
3. In surgical ward: operative staff, scouts, anesthetists, technicians, postoperative.
4. Theatre wear should include: masks, gloves, gowns, shoe cover and appropriate cover of theatre dress for external visits.

Prevention starts with careful knee positioning during surgery and avoiding pressure. Treating nerve palsy includes removing the dressing and flexing the knee.

Preoperative evaluation should include measuring pulse rates at all points on the leg and doing arterial vascular studies. Prevention is imperative to avert arterial and neurovascular complications after total knee arthroplasty (TKA), because nerves are close to the bone surfaces, the surgeon needs to be skilled enough to exercise extreme caution to refrain from the laceration of the vessel, thrombosis, or compartment syndrome.

Avoidance of compression bandage, caution while placing retractors and avoiding hyperextension after creating bone cuts can avoid arterial injuries. Surgery may be required again, if no improvement is made after 2 months. Neurolysis may be considered for persistent palsy.